HCIE-Datacom V1.0 H12-891_V1.0-ENU Real Questions For Best Preparation

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Page 1 of 16

1. Which of the following parameters should be modified to re-establish the is-IS neighbor relationship?

Modify the Cost value of the IS-IS interface

Modify the send interval for the IlH of the IS-IS interface

Modify the Level of the IS-IS interface

Modify the IP address of the IS-IS interface

2. The following description of VRRP load sharing is correct? (Multiple choice questions).

When configuring priority, make sure that the same router acts as a master in the three VRRP backup groups

You can create multiple VRRP backup groups on one interface of a router . The router can act as a master for one VRRP backup group and as a backup for other VRRP backup groups

When you deploy load sharing, hosts in the same LAN are required to configure the IP addresses of different virtual routers as gateway addresses for missing provinces

VRRP load sharing requires at least two virtual routers to provide forwarding services at the same time

3. In route-policy, what are the BGP attributes that can be used for the apply clause?

AS-Path

MED

Local-Preference

Day

4. The following description of MP-BGP is incorrect? (Single choice questions).

The MP_UNREACH_NLRl of the update message, excluding the path nationality.

MP-BGP can be used to assign tags.

MP_REACH_NLRI and MP_UNREACIH_NLRI are optional transition properties.

A complete MP_REACH_NLRI attribute structure contains address family, next hop, and prefix information.

5. As shown in the following figure, R1 and R2 establish a neighbor relationship for Level2, which is critical: placed as follows, then the following about The route entry for R2 is correct

The 0:/64 router appears in the IP routing table

2022:/64 Routers appear in the IP routing table

2019::/64 Routers appear in the P routing table

2021:-/64 Router will appear in the P routing table

6. Auto-negotiate mode is to obtain the maximum interface rate and operating mode, the

network administrator configures all Ethernet interface rates of a working switch to 10OMbps, and the operating mode is configured as Full-duplex, when a network card is configured After the auto-negotiate workstation is connected to the switch, the negotiation result is that the interface rate is 10OMbps and the working mode is half-duplex, which of the following explanations is the most reasonable for this phenomenon?

The problem is on the workstation's NIC, mostly due to the aging of the NIC driver on the workstation, which causes the workstation NIC to learn the interface rate and operating mode configured on the switch

Port rate negotiation is negotiated through the initial port sending FLP, and the operating mode is not negotiated through FLP

STP initializes the port into the blocking state, causing auto-negotiation to fail, so the port should be configured as an edge port

At higher port rates and operating modes, the workstation's network interface card cannot be configured as auto-negotiate

Auto-negotiation is not configured on the switch, resulting in the switch not being able to send FLP messages to the workstation, causing the workstation to set its own operating mode to Half-duple

7. The following statement about IS-IS (IPv6) is correct?

In order to support the processing and calculation of IPv6 routes, IS-IS has added TLV232 and 236

By default, IS-IS has the multi-topology feature turned on

IS-IS works at the data link layer and only needs to add a new TLV to support IPv6

In order to support the processing and calculation of IPv6 routes, IS-IS has added NLPID to the 129 TLV

8. Which of the following IEEE standards is specific to Gigabit Ethernet?

8023z

8023ab

8023ad

8023af

9. Router RI and Router R2 run BGP. Both routers are in the AS65234 The route for router R2 exists in the BGP routing table of the router RI, but not in the IP routing table of the router RI . So what causes the problem to occur? (Single Choice Questions).

Synchronization is turned off

The

BGP neighbor relationship is Down

Router R1 does not enable BGP Multi-hop

Routing is not optimal

10. When configuring ISIS zone authentication, which ISIS message will carry the authentication letter? (Single choice questions).

ISIS?Level-1?SNP?LSP?

ISIS?Level-2?SNP?LSP?

Hello message of ISIS's Level-1.

Hello message of ISIS's Level2-

Page 2 of 16

11. The Option field in OSPEv3 appears in all LSAs

True

False

12. For Layer 2 VPN technology, the following statement is correct? Multi-select

VPLS is a widely used technology in the live network, which can provide transparent transmission of three-layer messages and achieve multi-point access.

The VPLS configuration is complex and the Layer 2 network transmits BUM packets.

BGPEVPN supports features such as tenant isolation, Multi-homing, and broadcast suppression.

BGPEVPN addresses mac address drift and multi-tenancy that VPLS cannot support.

13. Which of the following configurations for OSPFv3 route aggregation is correct?

[Huawei]ospf3 1 [Huawei-ospv3-1]area 1 [Huawei-ospf3-1-area-0001] abr-summary fo0:0 0:48 cost 400

[Huaweijinterface gigabitethernet 1/0/0[Huawei-GigabilEthemnet1 / 0/0] asbr-summany fcOO:0048 cost 20

[Huawei] ospfs 1 [Huawei-ospf3-1] asbr-summary fcO0:O:0:.48 cost 20 tag 10o

Huawei]ospv3 1 [Huawe-ospt/3-1]area 1 Huawei-osph3-1-area-0001]asbr-summary fc000:048 cost 20 tag 100

[Huawei] ospfv3 1 [Huawei-ospfv3-1] abr-summary fc000:0;. 48 cost 400

14. In different scenarios, RSTP provides different protection functions, and the wrong statement about this statement is

The root protection feature is enabled for the specified port, and its port role can only remain as the specified port

When the anti-TC-BPDU packet attack feature is enabled, the number of times the switching device processes IC BPDU packets per unit time is configurable

after the BPDU protection function is enabled on the switching device, if the edge port receives RST BPDU, the edge port will be set to a non-remote port and the spanning tree calculation will be re-performed

Start the specified port of root protection, when the port receives a better RSTBPDU, the port will enter the Discarding state and is no longer forwarding packets. If the port does not receive a better RSTBPD for a period of time then automatically revert to the normal Forwarding state

15. BGP routing policies can control the publication and acceptance of routes

TRUE

FLASE

16. What are the following advanced features supported by BGP EVPN?

ARP broadcast suppression

VRRP overVXLAN

Multi-active gateway

WI-AN Qos

17. MACsec provides users with secure MAC layer data sending and receiving services .

Which of the following is not a service available by ACsec?

User data encryption

Data source authenticity verification

Integrity check

Controllability check

18. The following description of the PPPoE data frame is correct? (Multiple choice questions).

Once a PPPoE session is established, all Ethernet packets are unicast

The Ethernet_Type domain is fixed to Ox8863

When PPPoE passes session data, Code must be set to Ox0

The Session_ID of the PPP session is not allowed to change and must be the specified in the Discovery phase

19. The following statement about VXLAN gateways is incorrect

Layer 2 gateway: Used to solve the problem of tenant access to the VXLAN virtual network, it can also be used for subnet communication of the same VXLAN virtual network.

Layer 3 gateway: Used for cross-subnet communication of VXLAN virtual networks and access to external networks.

VXLAN Layer 3 gateways can be divided into centralized gateways and distributed gateways.

Layer 2 gateway and VPN instance binding.

20. In an MPLSVPN network, when a packet enters the Internet and is forwarded, it is encapsulated with two layers of MPLS tags, and the processing of the packet in the following options is described correctly?

The penultimate hop device receives packets with an outer label of 3

The Egress PE appliance receives an UNlabeled IP packet

The Egress PE device correctly sends packets to the appropriate VPN

based on the inner tag The packet pops up the outer label on the penultimate hop device and forwards it to the Egress PE device

Page 3 of 16

21. In 0SPFv3, Router-LSA is generated by each router, which describes the interface address and cost of each link of the router, and also includes the RouterlD of the neighbor router

True

False

22. In the VXLAN implementation, the mapping relationship between VNI and BD is

1:N

N:1

1:1

N: M

23. As shown in the figure, which of the following options satisfies two routers to establish an ISIS neighbor? (Single choice questions).

Both routers are of The Level-1 type.

Both routers remain of the default type.

One of the two routers can be of the Level-1-2 type and the other of the Leve1-1 type.

The ISIS process numbers of the two routers must be consistent.

24. Comparisons for primary switch elections in the stack include?

MAC address

Health status

Stack priority

Stack ID

25. SSH uses asymmetric encryption algorithms AES and DES to achieve security for data transmission, and uses HMAC to ensure the complete integrity of integer data

TRUE

FALSE

26. D Class IP address range 239000-239255255,

What does 255 do? Radio

SSM multicast address, the multicast address segment is valid for the whole network

Any legitimate multicast traffic and multicast application can adopt this address

Locally managed multicast address, which is valid only locally

Link-local multicast address, where traffic that uses that address includes network control messages and that address range is only the multicast address segment used by the

routing protocol

27. The role of Link-LSA in OSPFv3 does not include?

Advertise to other routers on the link optional that is set in the Network LSA from which this link originates

Advertise the per-port ID of this router to other routers on the link

Advertise the link-local address

of this interface to other routers on the link Advertise this IPv6 prefix list to other routers on the link

28. The following link-LSA for OSPFv3 is correct?

Contains both the link-local address of this interface and all IPV6 prefixes of the same area on this router.

Contains both the link-local address of the interface and all IPv6 prefixes on the interface.

?Link-LSA???Prefix?Prefixoptions???Ox00,?? Prefix????IPv6??????

The Option field exists in the header of the LSA, not in the data area of the Link-LSA

29. If four routers run ISIS and have established an adjacency relationship, and the area code and router rank are marked as shown in the figure, what is the cost value of R4 reaching

10022/32?

30. If the Option field value in the 0SPFv3 Hello message issued by the router's GIgabit Ethermet0/0 interface is 0x000013, the following description is correct

The Gigabit/thernetO/0/0 interface of Router A adds IPv6 routing to compute

Router A's Gigabit/thernetO/0/0 interface belongs to the NSSA zone

Router A supports AS-An External-LSA flood

Router A is an OSPFv3 device with forwarding capability

Page 4 of 16

31. When troubleshooting a local area network, you notice a large number of frame alignment errors, FCS errors and LAG conflicts, and the possible cause of these problems is?

Switches and terminals are interconnected over 10/100/1000base-T Ethernet links, and switches and terminals operate in half-duplex mode

There is a mode mismatch on the 1000base-LX/LH link

The operating mode does not match

on a 10/1000/1000base-T Ether link This type of error occurs in most environments

32. The following statement about IPSec VPN is correct?qo

Two routers establish an IPSec VPN in brutal mode, so that the two devices can interact with a minimum of 4 messages to establish a tunnel.

Brutal mode can support NAT traversal, while main mode does not support NAT traversal.

The two routers can establish OSPF neighbor relations and exchange intranet routes through the IPSec VPN tunnel

The two routers establish IPSecVPN in main mode, and from the 5th packet (included), the payload's data will be encrypted.

33. RTA is the source DR router, RTB is the RP router, and the multicast source sends multicast data to the RTA, but the PIM is not visible on the RTB Register the multicast source to which the message is registered, then the possible causes are?

Multicast network statically configures RP, while RTA router does not statically configure RP

The RP elected by RTA is not an RTB

RTB to RTA has no unicast routing, causing the RTB to fail RPF checks for the source

The multicast network dynamically elects the RP instead RTA failed RPF check for BSR

34. What commands are related to BGP route reflectors? (Multiple select).

reflect between-clients

group 1 internal

peer reflect-client

reflector cluster-id

35. The command to configure VRRP preemption delay is?

vrrp vrid 1 preempt-mode timer delay 20

vrrp vrid 1 preempt-delay 20

vrrp vrid 1 preempt-timer 20

vrrp vrid 1 timer delay 20

36. Regarding the MPLS handling mode of TTL, the following description is correct?

Pipe mode. When an IP message passes through an MPLS network, the IPTTL minus l at the entry point is mapped to the MPLS TTL field

MPLS tags in the TTL, which mean the same as the TTL domain in the IP header. TTL prevents mpLS networks from creating routing loops

In Unifor mode, when an IP message passes through an MPLS network, the inbound IPTTL is minus 1. The MPLSTTL field is a fixed value

In MMLSVPI, if you need to hide the structure of the MPLS backbone network, you can use the Uniform mode on Ingress for private network messages

37. Users within a typical VPN can only communicate with each other, not with Internet users, and with Internet. But VPN individual sites may have access to internet's needs. The correct description of the implementation of VPN interconnection with internet is? (Multiple choice questions).

is implemented on the user side, and the CE is directly connected to the Internet. Each user site can be connected to the Internet separately, that is, the CE of each site is configured with a default route to the Internet.

Implementing a complex implementation on PE and having security implications, PE devices may be subject to Dos attacks on the Internet.

Implemented on PE, the PE device issues a default route to the CE to the Internet and adds a default route to the VPN instance routing table pointing to the Internet Gateway o

Implemented on the user side, the implementation method is simple, and the public network and private network routes are isolated, safe and reliable.

38. Which address prefix in the following options indicates that the address is globally unique and globally routable among unicast addresses in IPv6, similar to a public address in IPv4? (). Single choice questions).

::1/128

FE80:/10

FE80::/10

2000:;/3

39. CORRECT TEXT

When configuring the source NAT and having no pat configuration parameters, which of the following statements is true? (Radio) A Perform destination IP address and destination port translation

B. Only source P address translation occurs

C. Only destination IP address translation occurs

D. Simultaneous source P address and source port translation

40. CORRECT TEXT

When the BFD detection intervals on both ends are 30ms and 40ms, are the following options described correctly? An

BFD session can be established, which takes 40ms after negotiation

BFD session can be established, which takes 30ms after negotiation

BFD sessions can be established, each occurring at its own interval

BFD sessions cannot be established

Page 5 of 16

41. If a Huawei S series switch needs to designate a member switch as the primary switch of the stack, it can power on this switch first, and then power on other member switches after 20s.

True

False

42. The network administrator defines a traffic policing policy as follows:

256K bytes

48128 bytes

32K bytes

80128 bytes

43. The following statement about is the ISIS protocol LSP message is correct

LSP fast diffusion feature, first diffuse less than the specified number of LSPs, to speed up the synchronization process of LSDB

By configuring an LSP-generated smart timer, the timer automatically adjusts the delay time based on the frequency of changes in routing information

When the link status information increases, the message length of the LSP can be increased so that each LSP can carry more information.

Reducing the minimum time interval for sending LSPs per port can speed up the diffusion of LSPs.

44. When DLDP detects the presence of a one-way link in the fiber, the default actions of Huawei equipment include: the DLDP state machine migrates to the Disable state, outputs Trap information, and automatically sets the interface to a blocked state.

True

False

45. A router receives a BGP route with the community attribute NO-Export, how will the router handle the BGP route?

Drop the route directly.

No more advertising to other BGP routers.

Advertise only to IBGP neighbors.

The route is advertised normally, but the route is not used to forward data.

46. What are the types of link types included in OSPF's route LSA?

Stubnet

P-2-P

VLINK

Fransnet

47. Level-1-2IS transmits Level-2LSP to the Level-1 area if the AT location 1 in Level-2LSP is delivered It means that the Level-1lS in the area can be accessed to the outer area through Level-1-2IlS

True

False

48. MSTP switches treat RSTP switches as MSTP domains, MSTP, which are formed by a single switch The interchange resolves the RSTBPDU to MSTBPDU, where IRPC is 0

True

False

49. 001.00001. Huawei sis pob enable topogy s andard Hhuawelitis ]l p6 importroute ospfv3

1 [Hu

C. [Huawei] sis 1 [Huawel-isis-1] networkentity47001.000000200 Huawe-ss 1 ipb6enable topologist standard Huawei is l p6 importroue esgp.31lese! [Huaweisis-1] quit [Huawei

D. HuaweJ IsIS

[Huaweij isis 1 Huavei-isis-1]networkentity470001.000000020Huawei-sis-1limpotroueosph31 ltuowe.is- ut tuawl sph 1 fhuwf spol Jronea d2222 [Huawei) isis 1 Huawe-sis-1] is level level-1 [Huavei-sis-1 etworkentity 47001.0000020 Huawel-d.-1[impotroteosph-1 le e. [tuawelts a ut ltunweospfv3 1 [Huawei

50. What is the significance of reserved multicast address 224000~22400255?

The multicast address range is reserved for the management of multicast addresses, and is valid locally

The address identifies Global lnternet, and the address range is valid for the entire network

This multicast address range is reserved for the management of multicast addresses, which cannot transmit multicast traffic to the Internet

Any legitimate multicast traffic and multicast application Junhui adopts an address change

The multicast address range is reserved for link-local multicast traffic, including network control messages, and the address range is only valid locally

Page 6 of 16

51. Router RL and Router R2 run BGP both routers are in the AS65234 The router R2 route is present in the BGP routing table of router RI, but not in the P of router R1 road

With BGP, both routers are in the AS65234 Route cry PD is done by the right big worker

By the table, so what causes the problem to occur? A, synchronization is turned off

The

BGP neighbor relationship is Down

Router R1 does not enable BGPMulti-hop D Routing is not optimal

52. Regarding the BGP alliance, the following description is wrong? Radio

The consortium divides an AS into sub-AS, and the alliance external AS still considers the consortium to be an AS

Subsystems within a consortium can use private AS numbers. Huawei NE/AR routers, a consortium can be configured with up to 32 subsystems.

Consortium can easily detect the routing loop within the AS because EBGP is running between the subAS

The subas number of the federation, which by default is advertised to the BGP peer outside the federation

53. A lot of overwave techniques have emerged in the process of replacing the IPV4 addresses used in the network with lP6 addresses. These technologies are divided into two categories, one is IP4IPV6 coexistence technology, the other is PA/IP>6 interoperability technology, which of the following options sleep in IPv4/IPv6 coexistence technology?

NAT64

IPv6 over IPv4

Dual Stack

ISATAP

54. CORRECT TEXT

A router Router LSA is shown in the figure, and the error in the following statement is?

A This router supports external routing ingestion

B. This router is a DR

C. The Router ID of this router is 100121

D. This router has established an adjacency relationship

55. Which of the following LSAs propagate in a single region only?

Router LSA

Summary LSA

Network LSA

AS External LSA

56. An existing router running OSPF is connected to zone 0 and zone l. You configured zone l as the Stub domain .

What classes does an LSA that operates only inside zone l contain?

1LSA,2 3LSA

3LSA 4LSA1 2

1?LSA? 2?LSA

1??LSA,2??LSA 5??LSA

7?LSA

57. In an MPLS VPN network, different CE devices exchange routing information with the same PE device using different routing protocols, and different CE devices use routing protocols that are independent of each other.

True

False

58. A routing tool can define multiple entries .

Which tool will automatically add a deni-any entry at the end of the configuration?

Route policy

Community-tilter

IP-prefix

AS-path-filter

59. As shown in the following figure, R1 and R2 establish a neighbor relationship with LeveL2, and the key configuration is as follows, so is the following route entry for R2 correct?

0::/64 The router will appear in the IP routing table

2022::/64 Routers appear in the IP routing table

2019::/64 Routers appear in the IP routing table

2021::/64 Routers appear in the IP routing table

60. After configuring the VLAN-based MAC address drift detection function, if the MAC address drifts, you can configure the actions of the interface according to your needs .

Which of the following is not a configurable action?

Send an alert

The MAC address blocks

Interface blocking

Traffic filtering

Page 7 of 16

61. XLAN uses BGP EVPN to establish a tunnel, what type of message is used? (Single choice questions).

Typel

Type2

Type3

Type4

Type5

62. Regarding the OSPFv3 protocol, what is the error described below?

Under the sukugan of a shared router, each OSPFv3 process runs independently

Multiple instances can be run in the same OSPFv3 under the same interface

Can support running multiple instances on a single link

OSPFv3 message header will contain instance IDFu Duan flogging

63. Network managers can use CAR technology in traffic policing .

What of the following technologies can be applied in CAR?

Double barrel two-speed

Double barrel single speed

Single barrel single speed

Three barrels of single quick

64. BGP authentication can prevent illegal routers from establishing neighbors with BGP routers, BGP authentication can be divided into MD5 authentication and Keychain authentication, please ask which BGP messages will be carried below BGPKeychain authentication information? (Multiple select).

Update

Notification

Keeplive

Open

65. The following statement about isis protocol LSP messages is correct

The isP rapid diffusion feature, which first diffuses out LSPs that are smaller than a specified number, speeding up the synchronization process of LSDB

By configuring an LSP-generated smart timer, the timer automatically adjusts the delay time based on the frequency at which the routing information changes

As link status information increases, the packet length of the LSP can be increased so that each ISP can carry more information.

Reducing the minimum interval at which LSPs are sent per port can speed up the diffusion of LSPs.

66. Which of the following configurations is the correct OSPFv3 route aggregation configuration:

[Huawei]ospfv3 1 [Huawei-ospfv3-1J]area 1 [Huawel-ospfv3-1-area-0001]abr-summary fc00:0-0:48 cost 400

[Huawei] interface gigabitethernet 1/0/0 [Huawei-GigabitEthernet1/0/0]asbr-surmary fcO0-0:0:48 cost 20

[Huawei]ospfv3 1 [Huawei-ospfv3-1]asbr-surmary fcO0-0:0::48 3 cost 20 tag 100

[Huawei]ospfv3 1 [Huawei-ospfv3-1]abr-surmary fcO0:0:0:48 cost 400

(Huaweijospf3 1 Huawei-ospfv3-1Jarea 1 Huawei-ospfv3-1-area-0001]asbr-sumary fcO0:0:0: 48 cost 20 tag 100

67. The message types of ISIS mainly include SNP, IIH, and LSP

True

False

68. What type of prefix does a router running BGP advertise to its IBGP neighbor (assuming the router is not configured as a route reflector)? (radio).

Prefixes are learned through other IBGP neighbors, or prefixes are learned from EBGP neighbors, or prefixes are learned through routing introduction

A prefix that exists in the routing table

Prefixes are learned through other BGP neighbors, or prefixes are learned locally through network or routing introduction

Prefixes are learned through EBGP neighbors, or prefixes are learned locally through network or routing introduction

The prefix is learned through an EBGP neighbor, or the prefix is learned from an from RR

69. The following statement about static VXLAN tunnel configuration is correct?

A BD needs to create an NVE country, and when there are multiple BDs, multiple NVE interfaces must be created

An NVE interface can be associated with multiple VNls, so you can create only one NVE interface when there are multiple BDs

For a VXLAN tunnel, you need to create a corresponding NVE interface, in which you explicitly specify the source IP address and the destination IP address, so there are multiple VXLAN tunnels on the VTEP that must be vE interfaces The destination address of the VXLAN tunnel is specified in the

NVE interface, and multiple VXLAN tunnels can create only one NVE interface

70. What kind of scenario can use AS-path-filter? (Multiple select).

A Filters routes received from BGP neighbors based on the AS PATH attribute carried by the route, such as the command peer

x.x.x as path-filter import

The apply clause in Route policy

Filter routes sent to BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peer x.x.x.x as path-filter export

The if-match clause in Route-policy

Page 8 of 16

71. The following description of ISIS's routed infiltration is correct? (Multi-select)

ISIS routing penetrates | Can be used in Pv6 environments.

Route penetration for ISIS can be deployed on Level-1 routers.

Route penetration for ISIS does not include aggregated routes.

Route penetration of ISIS does not cause neighbor concussions.

Route infiltration of ISIS is used to prevent routing loops.

72. The following description of LDP reliability is incorrectly? (Radio).

LGP GR takes advantage of the high difference between the LS forwarding plane and the control plane to realize that the device forwards without interruption when the protocol is restarted or the master-standby is reversed

Manually configured LDP FRR policies default to 32-bit backup routes that trigger LDP to establish backup LSPs

LLDPFRR also allows LSPs to be generated for tag mappings from non-optimal next hops, and as a live LSP backup, supervising forwarding table entries

LDP and IGP linkage, the need for IGP has been routed to release, to ensure that LDP and LGP path consistent

73. CORRECT TEXT

If you need to configure routing policies on one router .

Which of the following parameters does an administrator use to route when deploying a routing policy? (Multiple select).

A Protocol

B. Application

C. Size of the packet

D. Throughput

E. Identification of a specific terminal system

74. After you divide an interface of the firewall into the Untrust security domain, the interface belongs to the Untrust zone and no longer belongs to the Local zone.

TRUE

FALSE

75. If the OSPF protocol is running in the network, after configuring the non-osseous thousand region in the OSPF region as the Totally Stub region, the ABR router sends a message to Totally The Stub area issues an LSA with an LSID of 0000, which category the LSA belongs to LSA? (Single choice questions).

LSA3

LSA1

LSA5

LSA2

76. The following statement about OSPF route filtering is incorrect. (Single choice questions).

In the NSSA area, filtering for external route ingestion and advertisement can be configured on ASBR or ABR

Filtering for the three types of LSAs needs to be configured on the ABR across OSPF regions

Interface-based filtering of LSAs allows all LSAs in the inbound and outbound directions except grace LSAs

Based on the link state database, when calculating routes, the fiter-policy import command is used, which only affects the route addition in the route table, and has no effect on the OSPF link state database

77. Regarding MP-BGP, the following description is wrong?

A. Radio

A. MP-BGP needs to assign a private label to the VPNv4 route

B. PE and CE are routed through BGP interaction, you need to create a BGP process on ce for each VPN instance

C. The message type and VPNv4 routing publishing policy for MP-BGP are the same as for BGP-4

D. MP-BGP advertises VPNv4 through two attributes, MP_REACH_NLRI and MP_UNREACH_NLRI Route

78. 0SPFV2 is running on the IPV4 network IGP: OSPF3 is running in the IPV6 network, OSPF35 OSPFV2 has the same message type. Includes hello messages, DOD messages, LSR messages, LAU messages, and SAX messages about OSPP The following statement is correct?

The hello packet of OSPFv3 carries the IPV6 address prefix of the router interface

OSPFv3 uses the authentication field of the packet header to complete the packet authentication

OSPFv3 uses the link-local address as the source address for sending packets, which can be forwarded outside the range of the originating link

OSPFv3 sends OSPFv3 packet using the IPV6 multicast addresses FF02::5 and FF02

79. Which of the following options uses an alternate channel to enable communication between IPV6 addresses?

DualStack

6to4

ISATAP

NAT64

80. Four routers R1, R2, R3, and R4 run IS, and the I5S router type is noted in the diagram. All four routers have an area address of 49001, and looking at the routing table on R1l shows the following results, the reason why R did not reach the route of 1034344

The routing policy configured on the ARO filters the System-ID of the default route

R2 from conflicting with R3

R and R4 Zone Planning Errors The System-ID of

R2 conflicts with R1

Page 9 of 16

81. The router connects two EBGP neighbors through two parallel Serial cables, what do you do to achieve bidirectional negative sharing between two EBGP neighbors connected by these two parallel Serial cables? (Single choice questions).

Without any method, BGP automatically implements load sharing of traffic across different autonomous systems on the available links

Use the Loopback interface to establish an EBGP neighbor relationship, configure EBGP Muti-hop, configure the Loopback interface as the update source, and then use IGP to implement Equivalent path load sharing between Loopback addresses

Configure the EBGP neighbor relationship with the Loopback interface as the update source, and the IGP in each AS needs to introduce two equivalent paths to the loopback address of the EBGP neighbor; And you need to use the command "next-hop?local"

Use the command "ebgp-load-balance" at both ends

To configure an EBGP neighbor relationship with the Loopback interface as the update source, the IGP in each AS needs to introduce two equivalent paths to the EBGP neighbor loopback address ; And the commands "ebgp maxhop" and "next-hop-local" are used

82. As shown in the following topology, EBGP is running between AS100, AS200, AS300, AS400, and the neighbor relationship is established S400 When you receive a BGP route from ASI00 for a 1.1.1.1/32 network segment, is the path order recorded in the ASPath

properties correct?

10,200,3

400,300,200,100

100, 200,300, 400

300, 200,100

83. As shown in the figure,

in the context of IPv4 and IPv6, the SEL field in the NET address of the ISIS is always valued as 00?

True

False

84. Regarding BGP MED, which of the following descriptions is correct?

In the BGP routing rules, MED has a lower priority than AS Path, Praferred-value, Local-Preference, etc Origin

The default value for the

BGP routing MED is 0

By default, if there is no MED value in the route attribute, it is processed by 0 If the bestroute med-none-as-maximum command is configured, MED is processed as the maximum 4294967295

By default, BGP routing rules can MED comparison of routes from different autonomous systems

85. CORRECT TEXT

Regarding how the device handles messages in the MPLS network model, what is the following description of the error?

The label forwarding path LSP is determined and established by various protocols during the forwarding of messages. There is certainly no stripping of the label on the

Both

LER and LSR are labeled.

For IP packets entering the MPLS domain, the device discards them.

86. As shown in the figure, SWA, SWB runs the PSTP protocol, and Cost of Path remains the default without modification, so the following statement is correct

GEO/0/1 on ASWB is Alternative port

GE0/0/2 on SWB is Alternative port

SWA On GEO/0/1 for backup port

SWB will become the root bridge

87. As shown in the figure, a company wants to achieve secure mutual access between the head office and branches through MPLSVPN, and at the same time requires that the IPN traffic of the branch bank must be forwarded through the head office to achieve traffic monitoring

A. VPN routing information can be exchanged between

A. CE and PE using BGP messages

B. When Hub-CE passes routing information with Hub-PE, you need to configure a route on Hub-PE that allows receiving AS numbers to be repeated 1 time to receive routes published by Hub-CE

C. Between Hub-CE and Hub-PE, and between Spoke-PE and Plan-CE, routing information can be exchanged using the OSPF protocol

D. An MP-IBGP peer relationship is established between Spoke-PE and THE VPN routing information is exchanged.

88. When the ABR is a type 5/7 LSA switch router for the NSSA zone, then the ABR can be paired to Category 7 LSA is a derivative of 5 LSAs for aggregation.

True

False

89. The Layer 3 logical interface on XLAN L3 Gateway that enables communication between different VXLAN virtual networks is?

Layer 2 sub-interface

NVE interface

VBDIF interface

VLANIF interface

90. Which of the following VPN technologies may have two IP message headers in one message?

GOES

SSL VPN

IPsec VPN

L2TP

Page 10 of 16

91. The following statement about the BFD one-arm echo function is correct (multiple choice).

The BFD one-arm echo function must be configured with local identifiers and carrier identifiers

The default destination IP address for the protocol message for BFD one-arm echo is 22400184

After the BFD one-arm echo function is turned on, the destination IP and source IP of the BFD message are inducted

BFD One-Arm Echo function is suitable for scenarios where one device supports BDD and the other device does not support

92. After BGP introduces routes for other protocols, the next hop in the BGP routing table is consistent with the next hop of the introduced routing protocol

True

False

93. In order for routers at both ends of the IPv6 over lPv4 manual tunnel to exchange routing information, OSPV3 can be enabled on the tunnel, osPFv3 will be able to form a normal neighbor relationship, and the tunnel interface will be treated as a P2P link interface.

TRUE

FALSE

94. As shown in the figure, there are two IP6 networks that can access the IPv4 network, and the IPsec tunnel needs to be established between the two IPv6 networks to communicate, which of the following requirements? (). Single choice questions).

ESP + tunnel mode

AH + transmission mode

AH + tunnel mode

None of the above options are correct

95. If a router only needs to forward iPv6 packets, you do not need to configure any IPV4 agreements and addresses on that router.

True

False

96. What messages does an NMS (Network Management Station) running SNMPv1 send to the agent?

Trap,Get? Set

Get,Set? Getnext

Get,Set,Getnext? GetBulk

Get,Set? GetBulk

Get Trap

97. The switch can suppress traffic by suppressing traffic and extremely other failures can affect operations, which of the following traffic suppression configurations is the wrong configuration

[Quidway] wan 10 [Quidway-wan10] multicast-suppression 1000 [Quidway-van10] quit

[Qudway ineface gigabtethemnet /0'1 [Quidway-GigabitEfthemetO0/O/1]multicast-suppression 80TQuidway- GigabitEthernet0/0/1]quit

Quidway inteface gigabiethenet ou0/1 [Quidway-GigabtEthernet/0/1J,broadcast-suppression 80 IQuidway-GigabitEthernet//1]Jqut

[Quidway] icmp rate-limit enable [Quidway] icmp rate-limit total threshold 20

[Quidway ] wan 10 [Quidway-wani0] broadcast-suppression 1000 [Quidway-van10] quit

98. As shown in the figure, a company sets up an OSPF network. The links in the figure all form OSPF adjacencies, and all OSFP devices declare their own loopback addresses. One day SIR2 The two links of the S2AR1 suddenly failed, and in order to detect if the network was operating properly, the engineers performed a device status check, which is correct as described below

R5 can normally learn the loopback route to R2

R3 can not learn the loopback route to R2

R1 can normally learn the loopback route

R3 of R2 The loopback route of R2 can be learned normally

99. Regarding the Stub region and the NSSA region of the OSPF protocol, the following statement is incorrect with a single choice

Neither the Stub region nor the NSSA region allows injection of Type4 LSA

Type5 LSA injection is not allowed in the Stub region, while Type5LSA injection is allowed in the NSSA region

Type7LSA injection is not allowed in the Stub region, while Type7LSA injection is allowed in the NSSA region

Both the Stub region and the NSSA region allow injection of Type3 LSA

100. The following description is correct regarding route control

IBGP routes can be introduced using the impot-route BGP command

AS-path-fiter is for AS-path, which affects the routing of paths.

OSPF, ISIS, and BGP can issue default routes.

In Node 10, if-match community-fiter1 and f-match as-pah-fiter1 are "and the relationship

Page 11 of 16

101. WRED is configured on the newly deployed router HW The following description of the WRED feature is correct as? (Multiple select).

WRED can set different drop thresholds and packet loss rates for packets of different priority

When traffic exceeds the minimum threshold, WRED starts dropping all ingress traffic (tail drops).

Avoid global synchronization by selectively dropping multiple TCP streams Low- bandwidth traffic is easier to drop than high-bandwidth traffic

102. In order to reduce the number of OSPF routes in some unscheduled areas, the OSPF protocol has developed special area functions, and the following characteristic description of ospf special areas is correct? (Single choice questions).

ASBR-Sunmary-LSA is allowed to be published to NSSA regions

AS-External-LSA is allowed to be published to Stub regions

Any OSPF zone can be configured as a special zone

Special area routers cannot establish OSPF neighbor relationships with regular area routers

103. If you delete a declared route entry on a BGP router, the BGP routing ring is triggered to send an Update message for route scattering, which carries the accepted mandatory attribute of the route entry that was discarded.

True

False

104. What is the relationship between CIR, BC, and TC?

CIR=TC/BC

CIR=BE/TC

TC=CIR/BC

TC=BC/CIR

105. You need to configure smart policy routing on the router to specify that specific traffic is forwarded through an interface. When policy-based routing is applied, what are the two most typical types of information that can be used to forward traffic along a particular path?

The TTL and source IP address of the packet

Source A address and the Layer 2 source address

Source IP address and specific protocol (such as FTP, HTTP, etc.)

Service type header and message length

106. The command to adjust the LINK cost value for the IS-IS interface is? (Radio)

ISIS cost

ISIS timer hello

lSIS circuit type

ISIS circuit level

107. The correct statement about the IGMP proxy is? Multi-select

The downstream interface of the IGMP proxy device generates multicast relay table items

IGMP proxy can detect the link status with the linkage through the information of the member host joining/leaving the multicast group, and realize the rapid switching of the primary and standby device links

IGMP proxy is typically deployed on devices between hosts that are members of the access device The

IGMP proxy device cannot send query messages to downstream member hosts in place of the IGMP queryer to maintain group membership

108. In Huawei devices, when SIS introduces external routes and sets external route tags for route information, the Metric type of ISIS does not need to be modified and remains default.

True

False

109. The following statement about IPSec VPN is correct

Brutal mode can support NAT traversal, while main mode does not support NAT traversal.

The two routers establish IPSecVPN in main mode, and from the 5th message (included), the payload's data is often encrypted.

Two routers establish an IPSec VPN in brutal mode, so that the tunnel is built with a minimum of 4 messages interacting between the two devices.

The two routers can establish an OSPF neighbor relationship through the IPSec VPN (19) channel and exchange intranet devices by

110. Is the following description of the differences between IGMP name versions correct?

IGMPv1/v2 cannot elect the queryer itself, while IGMPv3 can

IGMPv1 does not support specific group queries, while IGMPv2 does

IGMPv1/2/v3 cannot support the SSM model

For members to leave, IGMPv2/v3 can actively leave, while IGMPvl cannot

Page 12 of 16

111. The following description of the LDPLSP establishment process is correct?

By default, LSRs are for the same FEC, and the received tag mappings can only come from the optimal next hop, not from the non-optimal next hop.

When a network topology change causes the next hop neighbor to change, the free label keep method is used. LSR can quickly rebuild the LSP by directly using the labels sent by the original non-optimal next-hop neighbor. Liberal needs more memory and tag space.

In the DoD mode of label publishing, for a specific FEC, the LSR does not need to obtain a label request message from upstream to distribute the label.

The process of establishing a

LSP is actually to bind the FEC to the tag and advertise this binding to the LSP upstream LSR process.

112. When there are multiple redundant links in an IS-IS network, multiple equivalent routes may occur. Regarding equivalent routing within an IS-IS network, which of the following descriptions is wrong?

When the number of equivalent routes present in the networking is greater than the number configured by the command, and these routes have the same priority, the next hop device System IlD large routes are preferred for load sharing

After you configure the equivalent routing priority, when the IS-S device forwards traffic to the destination segment, it will not use load sharing, but forward the traffic to the next hop with the highest priority

For each of the equivalent routes, you can assign a priority, with the highest priority routes preferred and the rest as backup routes

If load sharing is configured, traffic is evenly distributed across each link

113. You want to set the DSCP value of VolP traffic in HW network devices to EF. According to the differentiated service model RFC, traffic token EF should be set to:

DSCP is set to decimal 36

IP ToS is set to OXEF

IP Experimental ECN

DSCP is set to decimal 5

Bitstream 101110

114. For the description of firewall security zones, the following statement is correct?

The same interface of a firewall can belong to different security zones

Different security zones of the firewall, the priority can be the same

The built-in security zone of the Firewall can be deleted

Different interfaces of the firewall can belong to the same security zone

115. What's wrong about vrrp timers is?

MASTER DOWN = (3*ADVER_ INTERVAL) + Skew_ time

Skew Time= (255-Priority)/255

By default, the time period for VRRP advertisement messages is 2 seconds

By default, the VRRP preemption delay is I seconds

116. What command can be used to prevent users from accessing multiple devices through the HUB on the switch's access port? (Radio).

[Huawe interface Gigabithemeto/0/1[Huawei-GigabiEthermeto/O/lport linktypetrunk [Huawel-GigabithemetO/1]port trunk allow pass vlan 10

[Huawei interface GigabiEthemet/0/1[Huawe-GigablEthemetO/0/1Jpor ink type acess(Huawei GigabitEthemet/O/Tipsg enable

Huawei interface GigabiEthemetO/0/1Huawei-GigabiEthemetO/OJport link-type acces Huawei GigabilEthemet/0/1port-secunty enable0

[Huawei iterface Gigabithemeto/0/1 (Huawei-GigabitEthemeto//1)pot ink type access(Huawel-CigabiEthemeto/1]portisolate enable

117. CORRECT TEXT

What are the ways to divide VLANs in Huawei switches? (Multi-select) A Subnetting based on IP.

B. Division based on QoS

C. Partitioning based on port

D. Division based on protocol

E. Division based on MAC address.

118. Regarding the description of the hello message in the PIM-SM message, the error is?

Hello messages are sent to multicast address 224005

Elect dr in multiple router segments with hello messages

Routers periodically use hello messages to stay in touch

In a PIM-SM network, a newly started multicast router needs to use hello messages to discover neighbors and maintain neighbor relationships

119. Regarding the difference between NSR and NSF, the correct one is?

The NSR must rely on a neighbor router to complete

Both NSR and NSF require a neighbor router to complete

NSF must rely on neighbor routers to complete

NSF does not require a neighbor router to complete

120. What is the following description of LDP reliability?

LGP GR (Graceful Restart) takes advantage of the high difference between the LS forwarding plane and the control plane to realize that the device forwards without interruption when the protocol is restarted or the master-standby is reversed

Manually configured LDP FRR policy defaults to a 32-bit backup route that triggers LDP to establish a backup ISP

The LDP ERR can also generate an ISP for a tag map from a non-optimal next hop, and create a forwarding table entry as a backup of the primary LSP

LDP and LGP linkage, the need for IGP to suppress the release of routes, to ensure that LDP and LGP paths are consistent

Page 13 of 16

121. There are many ways to establish a cluster on a box switch, what methods does Huawei frame switch support to establish a cluster?

Set up via a cluster card on the motherboard

Establish

through the cluster daughter card on the interface board. Establish

through the service interface on the interface board Established by switching the cluster card on the network board

122. What improvements have been made to the IGMPv2 protocol compared to IGMPv1? (Multiple Choice)

Added maximum response time field

Added high group messages

Added specific group query message

Added a specific source group query packet

123. There is a new HW office that needs to use their router as a DHCP server. When configuring the DHCP server to provide DHCP services to the current office, what of the following items need to be configured?

Exclude unused IP addresses from the DHCP server

Configure the timeout period for ping packets

Configure the startup file for the DHCP server

Configure manual binding

Configure dhcp address pool

124. A VRRP virtual router configuration VRID is 3 and the virtual IP address is 100 1. 1. 10, so what is the virtual MAC address?

O0-00-5E-00-01-64

01-00-5E-00-01-03

01-00-5E-00-01-54

00-00-5E-00-01-03

125. Regarding the FTP protocol, which of the descriptions below is correct?

In FTP Passive mode, the client completes the initialization of the TCP session for control and data

In FTP Active mode, the server tells the client which port it expects to send data on by commanding "PORT"

FTP always uses a TCP session to transmit control information and data information

FTP always uses TCP port 20 to establish a data session, and ICP port 21 to establish control will always use

FTP TCP port 21 to establish a data session, TCP port 20 to establish a control session

126. IPV6 multicast introduces the concept of multicast scope, which of the following ways is the multicast scope concept implemented? Multi-select

When the group shake source sends IP6 multicast data, the TTL value of the packet is set to limit the transmission range of the group shake

There is a special field in the IPv6 multicast address that specifies the propagation range of multicast.

Multicast scope is just a concept of spreading scope, and there is no specific technical implementation.

During network configuration, the administrator uses the configuration command at the edge of the network to limit the multicast scope.

127. Router A has an IP route entry with a purposeful CIDR block of 10001/32 and an outgoing interface of GigabitEthernetO/0/1. Now add the following configuration: acd number 2000 rule 10 permit source1001.10#traffic classifier test if-match acl 2000 # traffic behavior test remarkdscp cs3#traffic policy test classifier test behavior test#

interfaceGigabitftherneto/0/1 ip address 1001212552552550 traffic-policy test outbound#assuming router A received a destination IP of 10001 Of packets, the following statements are correct:

If the data packet source lIP address is 1001.2, it can be forwarded with the DSCP field marked CS3

If the packet source IP address is 1001.1, it can be forwarded while the DSCP field is marked as CS3

If the packet source IP address is 1001.2, it cannot be forwarded

If the packet source IP address is 1001.2, it can be forwarded while the DSCP field remains unchanged

128. What is the wrong description of the function of OSPFv3 protocol authentication?

OSPFv3 can only establish a security alliance SA using manual mode

Huawei router OSPFv3 IPSec authentication can not only support transmission mode, but also support tunnel mode

OSPFv3 authentication relies on IPv6 packet authentication headers and encapsulation security net load headers

The OSPFv3 protocol header removes the Type and Automation fields

129. If multiple candidate RPs are configured in a multicast group, which of the following parameters does the RP that elect the group from multiple candidate RPs need to be compared?

The mask length of the group range for the C-RP service that matches the group address that the user joined

C-RP priority

The IP address of the

C-RP interface Number of

C-RP interface

130. You are now troubleshooting a LAN, and you suspect that the error is due to a mismatch in the work mode .

Which switch interface error indicates that the 10/100/100O IEE gigabit interface operating mode does not match? (Multiple choice questions).

Alignment error

FCS error

Super Small Frame

Excess Conflict

Lag conflicts

Page 14 of 16

131. Which of the following does the digital certificate not contain?

Digital envelopes

Issued by

Digital signature

Public key information

132. To build a loopless Layer 2 network, which of the following schemes is optimal? (Single Choice)

Stacking + Link Aggregation

TRILL+MSTP

??+MSTP

Link Collection + MSTP

133. Regarding route Policy, the following description is correct as? (Multiple selection) Multiple selection

Advanced ACLs can be applied in route-policy to filter routes

The table entry exceed::0 less-equal 128 indicates that all IPv6 routes are allowed through

If more than one node is defined in Route-policy, at least one node in each node should have a matching pattern of permit

Route-Policy can filter only the default route

134. Regarding the DSCP field, the following statement is incorrect: single selection

The DSCP value can be 0, and packets use the default forwarding mechanism when 0

When the value of DSCP is EF, it indicates that the data belongs to the accelerated forwarding class.

In addition to indicating the priority of the data, DSCP can also indicate the probability of data being discarded. The CS class in

DSCP divides data into 8 priorities.

135. Which is the correct description of optimal routing election for each protocol in the following options? (Radio).

Route entries in BGP that are unreachable for the next hop are also placed in the IP routing table. In the

BGP protocol, the best route to reach the same destination circumference is selected by comparing the cost values of the route entries.

The OSPF protocol puts all the routing information in the LSDB into the IP routing table.

From BGP and OSPF, different route entries to reach the same destination segment are learned, and the optimal route is selected to join the IP route table by comparing the protocol's preference value .

136. As shown in the figure, all routers run OSPF, which is correct in the following statement:

Both R2 and Zone 0 generate Router LSA

R2 generates Router LSA only in Zone 0

R2 forwards the R1-generated Router LSA to R3

R2 Forwards the R3-generated Router LSA to R1

137. What does IPV6 enable topology ipv6 mean under IS-IS protocol view?

Does not have any meaning

SPF calculation for IPv6 is not supported

SPF calculation is performed separately in the topology of IPv4 and IPv6,

IPv4, IPv6 using the same topology for SPF calculation

138. The following is the correct statement about the LSA of OSPFv3?

Inter-AreaPrefix-SA's LinkStatelD contains the prefix

Router-LSA and Network-LSA does not contain routing information

When the Intra-AreaPrefixLSA's ReferencedLinkStateType-2, referencedLinkStatelD contains the interface to DR ID

Inter-AreaPrefirLSA also contains LinkLocal information file

139. As shown in the figure, private network routing information is exchanged between PEl and PE2 and their respective CE via OSPF, and the same is configured on PEI and PE2 Domain

D. When routing is introduced from BGP to OS9PF on PE2, the following limited types of LSAs may be passed to E2?

Type7 LSA

Type5 LSA

Type3 LSA

Type1 LSA

140. In a multicast network, what causes multicast traffic to not forward properly?

The router does not have an RPF route

PIM is not enabled on the RPF interface

The upstream router will receive the PIM Join message dropped

Multi-router egress network, this router is not DR

Page 15 of 16

141. When the ACL in the VRP has multiple matching rules (rules), the matching order is about Which of the following statements is true? (Confirmed).

By default, matching is based on the principle of "depth first"

By default: Match in the order in which the perfect is matched first, then deny is matched.

By default, rule-ID is followed Match from small to large

There is only one matching order and cannot be modified

142. ipv6 link-local addresses can be generated through stateless autoconfiguration

TRUE

FALSE

143. The following information about MPLS tags describes the error as? (Single choice questions).

By default, devices support php features, and the ERAS node that supports PHP assigns a tag value of 3 to the penultimate hop node

When the tag value is 0, the tag must be ejected and the message must be forwarded based on IPv4

The MPLS tag is 4 bytes long and encapsulated between the link layer and the network layer.

If the bottom of the label identifies S=0, it indicates that the label is the bottom label and is directly forwarded to the I

144. In broadcast networks, elections to DIS begin only after a neighbor relationship has been established

True

False

145. The topology diagram and configuration are as follows, and now we hope that there is no buttoned route entry of 10033/32 in the Rl route table

Configure route summarization on R3 to summarize the routes to 10000/16

Configure route rollup on R2 to summarize the route as 10000/16

Configure filter-pollcy on top of R1 with 10033/32 via ACL

Also applied in the Import direction

Configure flter-policy on the above, match 10033/32 through ACL, and apply the answer in the expo direction

146. The following about BGP routing, what is the wrong description?

Non-aggregate routes take precedence over aggregate routes.

In the case of PrefVal, Local_Preference equality, if the BGP preference of the locally generated route, IBGP route, EBGP route is equal, the valid reference of this generation is preceded by priority.

See the following entry in the BGP routing table: • *172 16 1. 11/32 0 00010 0? Indicates that the route is available non-optimal.

For next_hop unreachable routes are invalid cat by and do not participate in the preference. Flogging case

147. The link quality of a company's network is poor, often failures lead to route oscillation, and even occasionally there are routing loops, in order to prevent the recurrence of these phenomena, the network administrator decided to deploy URPF in the whole network to improve the stability of the network

True

False

148. The means of the LAND attack is that the attacker sends an SVN packet message with the same source and destination addresses to the target host, the source port and the destination port are the same, and the receiver waits for the final ACK packet to be sent, the connection is always in a semi-connected state, resulting in a full limited TCP reception Waste of resources

True

False

149. An advanced access control list is a sequence of rules consisting of permit |deny statements that can match IP messages based on which attributes?(). Multiple select).

Destination port number

Source address

Destination address

Source port number

150. The following description of IGMPv1 and IGMPv2 is correct? (Multiple select).

IGMPv2 message types include member departure packets

IGMPv2 does not support specific group queries

IGMPv1 supports universal group queries

The IGMPv1 message type does not contain members leaving the packet AD

Page 16 of 16

151. Regarding the BGP ring protection mechanism, is the following description correct?

The AS_ PATH attribute is used between autonomous systems to prevent ring cats

The Cluster List property is used for loop guard within the reflector cluster, and the router rejects the route when it finds that the Cluster List of the route entry contains its own Cluster I

Routes learned from IBGP are not advertised to IBGP neighbors and are used to prevent routing loops inside the A

You can use the AS_ CONFED_SET attribute to prevent loops within a consortium.

152. Router HW cannot access hosts in the remote network, router HW runs routing protocols and only pings the remote file server address 105401 on router HW with extensions

through a default route remote network, the result of ping on the router HW is rendered as 'requ.' est time out', according to the above description, the error in the following analysis is?

The next hop router for router HW did not reach the destination address

Router HW does not have a legitimate router to reach the destination address

Ping is successful, but congestion occurs on the path to the destination address

There is a firewall in the remote destination network, and the destination address can be reached without releasing ICMP traffic

ICMP packets, but the destination device fails to reply