HCIE-Routing & Switching (Written) V3.0 H12-261_ V3.0 Actual Questions

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1. Which of the following description about the label space of MP L S is wrong?

When the penultimate hop LSR p er forms label switching, if t h e value of t h e label after the exchange is found to be 3, the label will be ejected by de f ault and the pa c ket will be sent t o the last h o p

If the outgoing label va l ue is 0, the router will directly d iscard the packet

Above 1024 is the label space shared by dynamic signaling protocols s u ch as LD P , R SVP-TE, MP-BG P , e tc .

16~10 2 3 is the label space shared by st a tic LSP and static C R-L SP

2. Regard i ng the description of IGMP Snooping, which is cor r ect? ( Multip l e Choice) A. I G MP Snooping solves the problem of multic a st packets broad c ast at Layer 3

B. I G MP Snooping does not consume the CPU of the switch

C. IGMP S n ooping builds a MAC multicast address table by monit o ring I G MP messages sent by the host D. IGMP S n ooping runs at the link l a yer and is a multicast restriction mech a nism on the Layer 2 Ethernet switch, which is used to manage a nd control multicast groups

3. Configure queue-based tr a ffic s h aping. If the queue length exceeds the cache s i ze, the tail is discarded by default.

True

False

4. What is the three-la y er logical interface used to implement di f ferent VXLAN virtual network communication on the VXLAN L3 Gat e way?

Layer 2 sub-interface

NVE inter f ace

VBDIF in t erface

VI ANIF i n terface

5. VXLAN uses BGP EVPN to establi s h a tunnel. What kind of packets are used? A. Type3

B. Type5

C. Type4

D. Type2

E. Type1

6. When t here a r e multiple redu n d an t links in an IS-IS network, multiple equal-cost ro u tes may appea r . Regarding equal-cost r outes in an IS-IS ne t work, which of the f o llowing desc r iptions is wrong?

When the number of e qual-cost routes in the ne t working is greater than the number c onfigured through commands, and the priorities of these routes are the same, the r oute with the higher Syst e m ID of the next hop device is pref e r r ed for load sharing

After the equal-cost ro u ting p r iority is configured, when the IS-IS device forwa r ds the t r a f fic to the destination network segment, it will not adopt the load sharing method, but will forward the tra f f i c to the next hop with the highest priorit y .

For each r oute in the e qual- c ost ro u te, the priority c an be specified, the route with the higher pri o rity will be preferred, and the rest will be used as backup routes

If load sharing is conf i gure d , the tra f fic will be evenly d i stributed to each link

7. An eng i neer uses two routers to t est IPv6 services, and simulates the interconne c tion between hea d qu a rte r s and branc he s by running BGP4+.

The logical topology of the network is shown in the figure. Reg a rding the tr a nsmission of IPv6 routes betwe e n two devices, which of the following statements is wrong?

When routing is transmitted, it will carry recognized manda tor y attributes such as AS_Path

BGP4+ transmits routing inf o rmati o n betwe e n peers throu g h Update pa c kets

When routing, the Next_Hop att r ibute must be an IPv6 global unicast address

If the Update message carries the MP_REACH_NLRI attribute, it means that the advertised route is reachab l e

8. Which of the following state m ents about RAD I US is correct?

MAC authentication does not requi r e a userna m e and pass w ord, so you cannot use R ADIUS to authenticate a user.

RADIUS a uthentication and Portal authentica t ion cannot be u s ed together. Because P o rtal authentication is usually used, the Portal serv e r can be used to authenticate users.

RADIUS protocol aut h entica t ion, authorization, and a u dit s e p aration.

RADIUS supp o rts both wired a n d w i reless access methods.

9. In addition to stateless address autoconfiguration, IPv6 devices can also obtain infor m ation such as add r ess, gateway and D NS through DHCPv6.

True

False

10. What is the meaning of ipv6 enab l e topology ipv6 in IS - IS p r otocol view? A. Doesn't have any meaning

B. Does not support IPv6 SPF calcul a tion

C. SPF calc u lation is performed sepa r ately in the topology of I Pv4 and IPv6

D. IPv4 and IPv6 use the same topology for SPF calculation

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11. A home user has op e ned a 10Mb / s broadb a nd. To improve the user exp e rience, the operator can stabilize at 12Mb/s when measuring speed. If we use token buck e t t e chnology to achieve this demand, which of the following methods is optimal?

cir 10000 pir 120 0 0

cir 10000 c b s 10000 pbs 12000

cir 8000 pir 12000

cir 10000 cbs 12000 pbs 12000

12. In the intranet MPLS BGP VP N F network, when a packet enters the p u blic network for forwa r din g , it

will be encapsulated with two la y ers of MPLS labels. The following description of the two-layer label, which is wrong?

By default, the router assigns the s a me label value to all VP N v4 routes destined for the peer P

The private network label is carried and distributed when the route is delivered by MP-BG

The p u blic network lab e l is distribu t ed by the LDP protocol.

The egre s s PE uses t h e inner la b el when d eter m ining which eg ress CE the message s h ould be sent to.

MPLS BGP VPN us e s two layers of labels: public network labe l s (also k n own as outer labels) and private network labels (al s o known as inner la b els).

13. The fo u r routers are runni n g I S -IS and have established ad j acency relationships. The area num be rs and router levels are marked as shown in the figure. If route p e netration is configur e d on the R1 device, what is the cost of R4 to 10.0.2.2/32?

14. T h e to p ology map and configura t ion are as follows. Now I hope t hat there is no detailed routing entry of 10.6.3.3/32 in the R1 routing table. Which of the following statements can achie v e this requi r emen t ? (Multiple C h oice)

Configure route summarization on R3 and summarize the routes to 10.0.0.0/16.

Configure route summarization on R2 and summarize the routes to 10.0.0.0/16.

Configure filter-policy on R2, match ACL 10 . 0. 3 .3/32, and a p ply it in the e x pot directi o n.

Configure filter-policy on R1, match ACL 10 . 0. 3 .3/32, and a p ply it in the import direction.

15. The Level-1-2 IS will send Level-2 LSPs to the level-1 IS Leve l -1 area in the domain. If the A TT position in the Level-2 L S P is 1, it me a ns the area Access to t h e external a r ea throu g h l e vel-1-2 IS. A. T rue

B. False

16. As s hown in the figure, PC1 and PC2 are h osts on the same network segment. W hich of the following d escriptions of the IPv6 nei g hbor s tatus b etween P C 1 and PC2 are correct? (Multiple questions)

If the MAC ad d ress information of PC2 can be queri e d on P C1, the nei g hbor relatio ns hip may be St al e at this time

If the MAC address information of PC2 c an be queri e d on PC1, the neighbor relatio ns hip may be Pro b e at this time

There may be five neighb o r sta t es betwe e n PC1 and PC2, which are Incomplete, R eachable, Stale, Delay and P r obe

If the MAC address i n formation of PC2 can be queried on PC1, then the neigh b or relationship - Reachab l e

17. Und e r VXLAN, di f fe r ent VPN su b net need to a ccess, wherein a subnet information follows, E V PN the R T10: 10both, R T1000: 100ep o rt, VPN under R T100: 100. What is the configurati o n of another subnet? (Mu l tiple choice)

Configure 1000: 1 000 b othevpn un d er VPN

Configure 1000 : 1000 both under EVPN

Configure 1000 : 1000 expot under EVPN

Configure 10 : 10both und e r VPN

18. IPv6 int r oduces Solicited-Node address, which of the following description about the address is correct?

This is a specific address, w hich is used to resolve MAC addresses in A R PV6.

The Solicited-N o de a d dress on the router interf a ce is automatically gene r ated, and th e re can be multiple.

If the Sol i cited-Node address is not configured , the router wi l l automatically generate o ne on each interface.

IPv6 introduces Solic it ed-Node address to support IPV6 mu l t i cas t .

19. Which types of m e s sages are support e d by the BGP protocol? (Multiple Choice) A. Open

B. Keepalive

C. Update D. Hello

20. T h e rou t er HW1 exists as an M P LS LSR router in the network of t he operator HW. The router receives a p acket carrying a label, but the label entry does not exi s t in i ts L FI B.

So how does the rou t er h andle the m e ssage?

Router HW1 uses LDP to crea t e an LSP and crea t es a new path for the label carried i n the packet in the LFI

Router HW1 will disc a rd the message.

Router H W1 will forward the message using the default label.

Router HW1 will strip the label and find the IP destination address of the FI

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21. In the MPLS-BGP-VPN environ m ent, if the label is only dis t ributed thr ou gh BGP or LDP, the MP L S

label of the packet has at mo s t two layers of labels. A. True

B. False

22. Rega r di n g the stub area in the O SPF protocol, the following statement w hich is correct? (Multiple

Choice)

ASBR cannot exist in the stub area.

The virtual link cannot t raverse the stub area.

stub area is not allowed to inject type7 LSA

The backbone a rea c a nnot be c onfigur e d as a stub ar e a.

23. In SSM, which versi o n of IGMP needs to be used? A. I G MPV3

B. I G MPV4

C. IGMPV2

D. IGMPV1

24. W hich layers are shared in the O S I reference model and the TCP / IP model? (Multiple Choice) A. E xpressi o n layer

B. Application layer

C. Transport layer D. Session l ayer E. Data link layer

25. The OSPFv3 protocol is a separately developed protocol. It di f f ers from OSP F v2 i n that OSP F v3 is based on links rather than network segments. Wh i ch of the fol l owing statement is i n correct?

The two r outers conn e cted to the link can e s ta b lish neighbor relationshi p s even if their IPv6 address prefixes are di f ferent.

The two r outers conn e cted to the link can e s ta b lish neighbor relationshi p s even if no unicast IPv6 add r ess is configur e d.

The routing information ob t ained by the OSPFv3 router from the neig h bor uses the link-local addre s s of the neighbor as the next hop of the forwarded packet.

All OSPFv3 interfaces use the Link-local addre s s as the destination address of the pa c ket e x c ept t h e virtual link.

26. When running OS P Fv3 on a Huawei route r , the OSPFv3 process will automatically select an interface ad d ress as the R outer ID of the process.

TURE

F ALSE

27. Non-St o pping- F or wa rding (NSF) and N o n-St o pping R o uti n g (NSR) a r e two solutions for high reliabilit y . W hich of the f o llowing statements are correct? (M u ltiple choice)

NSR routers need to negotiate NSR support through specific p acket negotiation.

After the NSF is enabled, the router perf o rms the master/sl a ve switchove r . The routi n g table and the forwarding table remain unchanged. Therefore, tra f fic is not lost during the G R time.

After the NSR is enabled, if the ma i n control board fails when the service batch backup is not completed, the NR switch cannot be completed.

NSF routers do not ne e d to s upport NSF through specific pac k et negotiation.

28. As shown in the following figu re , R1 and R2 establish the neighb o r re l ationship of Level2. Which of the following statement about the R3 route entry is correct? ( M ultiple choice)

2020::/64 router will appear in the IP routing table.

2022::/64 router will appear in the IP routing table.

2019::/64 router will appear in the IP routing table.

2021::/64 router will appear in the IP routing table.

29. MQC is the same as PBR, and c a n only be called un d er the three-layer interface of t h e device. A. TRUE

B. F ALSE

30. Which of the following description is true about BGP aggre g ation?

After the Aggre g ate ipv4-add r ess mask is configur e d, only t h e ag g rega t ed routes a r e advertised and the detailed r outes are not advertised.

For IPv6 r outes, BGP supports manual ag g re ga tion and aut o ma t ic aggre g ation.

BGP enables automatic aggregati o n by default

Manually agg r egate r o utes in t he BGP local routing table.

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31. Man-i n -the-middle at t acks or IP/MAC spoofing attacks can cause inform a tion leakage and other hazards, and are more common in intranets.

In order to p r event man-i n -the-middle a ttacks or IP/MAC spoofi n g attacks, w h at con f iguration methods can be adop t ed?

Enable DHCP Snoop i ng to check t he CHAD D R field in the DHCP RE Q UEST message

Limit the maximum number of MAC add r esses that can be lear n ed on t h e switch inte r face

Configure T rusted / Unt r usted interface

Configure the linkage betwe e n D H CP Snoopi n g and DAI or IPSG on the switch

32. Which of the following Commun i ty attributes c a n ensure that the propa ga tion range of BGP routing entries is only within the AS? (Multiple choice)

No_Export_Subconfed

No_Export

Internet

No_Adve r tise

33. A router is configured for OSPF a n d is connected to two ar e as: area 0 a n d area 1. You configure area 1 as a stub area. Which LSA typ e s will exist i n side area 1 ?

Type 7

Type 1 and 2

Type 1, 2, and 5

Type 3 and 4

Type 1, 2, and 3

34. Which of the following statemen t s about VLAN aggr e gation are correct? (Multiple qu e stions) A. Sub-VLAN is used to is o late the broadcast domain

B. A Super VLAN can contain one or more Sub-VL A Ns

C. Super Sub-VLAN contains physical interfaces, which can establish a three-layer VLANIF interface

D. Sub-VLAN contains physical interfaces, and c a n establish a t hree-layer VLANIF interface

35. ping -a X -c Y -s Z - vpn-instance M 10.5.2, what is the meaning of this command? (Multiple choice) A. The ICMP request of t h e ping, the packet size i s Z (excludi n g IP and ICMP head e r)

B. The source IP address of the ping packet i s X C. The ping packet belongs to VPN instance M D. The ping sends Y ICMP requests

36. Which of the following are u s ed in Ethernet networks? (Multiple Choice) A. Non-Ca no nical format MAC addre s ses.

B. CSM A /CD for media acces s .

C. Canonical format MAC addresses. D. 802.5 encapsu l ated fr a mes.

E. 802.3 encapsulated fr a mes

37. The firewall has created some s e c urity zones by default. Wh ich of the f o llowing secu r ity zones does not exist on the firewall by default?

T rust

Local

Internet

DMZ

38. What a r e the benefits of OSPF a r ea division? (Multiple cho i ce)

It can reduce the size of LS D B and thus reduce the consumption of router memory

LSA can also be reduced with the division of areas, reducing the consumption of router CPU

A large n u mber of LSA flooding is restricted to a single area

Routers in an area can und e r s tand the topology details outsi d e their area

39. BGP c a n only auto- a ggr e gate ro u tes whose s o urce is I n complete. A. T rue

B. False

40. IGMP SSM Mapping statically binds the multicast source to the multicast group, so t h at group members of IGMPv1 and CGIPv2 can also access the SSM multicast network. Which of the following statements a bout ICIP SSM Mapping is wrong?

The addr e ss of the SSM multic a st gro u p is 232.0.0.0-232. 2 55.255.2 5 5

Statically configure the SSM addre s s mapping r u les on the I G MP querie r , and map the gro u p join information in the IGMPv1 or IGMPv2 membership report to the group leave information

ICMP SSM Mapping d oes not process IGMPv3 rep o rt mess a ges. In order to ensure that hosts run n ing any version of IGMP on t he same network segment can get S SM serv i ces, it i s nece s sary to run IG M Pv3 on the multicast router interf a ce conn e cted to the n etwork seg m ent whe r e the member host i s located

If IGMP SSM Mapping is not enab l ed, neither IGMPv1 nor IGMPv2 support the deployment of SSM multicast

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41. In multicast network, what ha p pe n s to multic a st tra f f i c that c annot be fo r war d ed nor m ally? (Multiple choice)

The router does not have RPF routes.

PIM is not enabled o n the RPF interface.

The upstream router d iscards the r eceived PIM Join messa g e.

Multi-router exit network, th i s router is not DR

42. The IS-IS neighbor b etween R 3 and R1 is not established. According to the information in this figur e , what is the p ossible cause?

The S y s tem ID of R3 a nd R1 a r e d u plicated

IS-Levels of R3 and R 1 do not match

The circuit-type of the int e rconnection interface betwe e n R3 and R1 d oes not match

IH cert i fication of R3 and R1 failed

43. About the description of MPLS lable related information, w h ich of the following is wr o ng?

The length of the MP L S label is 4 b y tes and it is encapsula te d betwe e n the link layer a nd the netw o rk layer.

By default, the device supports the PHP feature, and the la b el value of the egress node supporting PHP which is allocated to the penultimate hop n o de is 3.

If the bottom mark of the label is S=0, it indicates that t h e l a bel is the bottom label and directly perfor m s IP forwarding.

When the tag value is 0, it indicat e s that the tag should be e j ected, and the packet m u s t be forwar d ed based on IPv4.

44. The following is about the LDP protocol session establishm e nt process, which is the correct description? (Multiple choice)

After the T CP connect i on is successfully establ i s hed, the a c tive party sends an initialization mess a ge to negotiate the pa r amet e rs r e lated to the LDP session.

The party with the larger t r ansmission ad d ress acts as the active party a n d initia t es t h e establishment of TCP connection.

The Hello message discovered by the LDP ne ig hbor uses TCP p a ckets. The destination a d dress is the multicast address 224.0.0.2.

After both parties receive the Keepalive messa g e from the pee r , the LDP session is established succe s s ful l y .

45. T raditional BGP-4 can only manage IPv4 unicast routing informa t ion. In order to provide support for multiple network layer prot o cols, MP-BGP extends BGP-4.

MP-BGP us e s address f a milies to d istinguish di f ferent network layer protocols. Wh i ch o f t he following add r ess families are currently support e d? (Multiple Choice)

BGP-VPNv4 address family

BGP - IPv6 unicast address family

BGP-VPN instance IPv6 add r ess f a mily

DBGP-IPv4 broad c ast address family

46. Which of the following statements about the fo r mat of OSPFv3 packets a re correct? ( Multiple choice) A. There is n o change in the option field of the Hello message

B. Hello message no lon g er conta i ns address information, but carries Interface ID C. Removed Authenticat i on and Auth T y pe fields

D. OSPF version number c hanged fr o m 2 to 3

47. Which of the following descriptions are correct about IGMP v 1 and IGMPv2? (Multiple choice) A. I G MPv2 d oes not support specif i c g roup queries

B. I G MPv1 message ty p e does not include member leave messages

C. IGMPv1 supports gen e ral group query

D. IGMPv2 message ty p es i n clude member leave messages

48. As shown in the figure, S W A, SWB, and SWC all run RST P . What a r e the port roles of GE 0 /0/2 on

SWB and GE0/0/1 on SWC?

Alternati v e port, Bac k up port

B a ckup port, Root port

Root port, Designated port

Backup p ort, Alternative port

49. The D H CPv6 s erver supports to p r ovid the ho s t with other c onfigurati o n information such as the DN S

server addr e ss. A. TURE

B. F ALSE

50. As s hown in the figure, in the I P v4 and IPv6 environment, the SEL field in the ISIS N ET address always takes the value 00.

T rue

False

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51. Which of the following statements a bout the attributes of the ISIS protocol LSP message are correct? (Multiple choice)

The LSP fast flooding feature first spre a ds out LSPs s maller than the sp ec ified number to speed up the synchronization process of the LSD

Configure an intelligent timer gene r ated by the LSP, which c an automatically ad j ust the delay time according to the change f r equ e ncy of the routing in f ormation.

When the link state inf o rmation increases, the packet length of the SP can be inc r ease d , so that each LSP can carry more information.

Reduce the minimum interval f o r sending LSPs on an interf ac e to speed up LSP diff u sion.

52. What is the main rea s on why R S TP converges faster than STP? A. RSTP inc r eases the t y pe of port st a tus

B. RSTP has less overhead

C. RSTP is n ot based on timer convergence

D. RSTP has a smaller t i mer

53. The multicast IP address is 229 . 130.130.1, a n d its corresponding MAC add r ess is _ _. A. 01-00-5E - 12- 8 2-01

B. 01-00-5E - 82- 8 2-01

C. 00-00 - 5E - 02- 8 2-01

D. 00-00 - 5E - 82- 8 2-01

54. Reg a rd i ng BGP recognized arbit r ary attributes, which of the following d escriptions a re correct? (Multiple choice)

Must be t r ansmitted between BGP neigh b ors

All BGP routers must be identified

It is not required to be i n the Update message, a nd it can be decided w he ther to add to the Update message according to the specific situation

BGP router may not recognize

55. W hat a r e the differe nc es between traff i c polici n g and traffic shaping? ( M ultiple Choice)

For traffic shaping, the rou t er will buffer excess p ackets u ntil the ba n dwid t h is available again.

For traffic policing, you can adjust t h e usage of the cache for t r affic e xceeding CI

For traffic shaping, you can adjust the usage of the buffer for traffic exce e ding CI

Apply traffic shaping in the direction of the entrance and use traffic policing in the direction of the exit.

Traff i c pol i c ing uses t h e t o ken bucket algorithm, and traffic s h aping uses the SPD alg o rithm.

56. By default, the switch c onfigures the MAC ad d ress table to be e mpt y . Host A c onnected to the switch sends the fi r s t unicast d a ta fra m e. What operation will the sw i tch perform after receiving the data frame? A. The switch will discard the data frame

B. The switch forwards the data frame out of an int e rface according to the destination MAC address of t h e data frame.

C. The switch records the source MAC address of the data frame and floods the data frame.

D. The switch caches the data f r ame and waits for the destinat i on host to s e nd the data frame and then forwa r d it.

57. Which of the following attac k s are DoS (Denial of Service) attac k s? (Multiple Choice) A. Single packet a tta c k

B. Source IP address spoofing attack

C. Man-in-t h e-middle att a ck

D. Flood attack

58. If the host HW1 in t h e HW device network wants to join a video conference, what does the host do?

Send IGMPv2 membership report u nicast to the default rout e r on the local network.

Send a unicast IGMPv2 membership report to the RP

Sending an IGMPv2 membership r eport through multicast on the local network, and the multicast add r ess carried in the IGMPv2 mem b ership rep o rt is the joined m ultic a st a d dress.

Send the IGMPv2 membership r ep o rt through multicast on the l ocal network. The de s tination multica s t add r ess sent by the IGMPv2 membe r ship rep o rt is "all PIM routers" 224.0.0.2 multicast a ddress.

59. Which of the following sta t ements about stack split i s wrong?

If the main and stand b y switches a r e in two stacking systems after the s tack is s pli t , t h e sta c k s y st e m whe r e the or i ginal main switch is located up d ates the topolog y , re- d esignat e s the standby switch, the original s tandby s witch is promoted to the main in the new s ta c king system, a nd the new s tandby s witch is elected at t h e same time

If the master and backup swi t ches are still in the same st a c k system after the sta c k is split, the slave switches separated from the origi n al master and b a ckup switches will re-elect the master a nd backup switches due to the t i meout of protocol packet s .

After the s tack is s pli t , t he MAC ad d resses of the two st a ck ing systems will change immediately

After spl i tting, multiple stacking systems will have the sa m e IP address and MAC ad d ress. In ord e r to avoid network failures, t h e stacking will perform MAD detection. The party t hat fails the MAD detect i on competition will shut down all physical devices e xcept the res e rved side port

60. If the Sticky MAC fun c tion of the interfa c e is enabled, w hat is the number of MAC a ddresses le a rned by the interfa c e by default?

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61. As s hown in the figure, there a r e two IPv6 networks that c an a c cess the IPv4 network. At the same t ime, an IPSEC t u nnel needs t o be established between the two IPv6 networks for communica t ion. Which of

the following encapsulation m odes can meet the requirements above?

ESP + tunnel mode

None of t h e above options

AH + transmission m o de

AH + tunnel mode

62. Which of the following statemen t s about BFD applications are correct? (Multiple choice)

The single-arm echo function is to d etect the connectivity o f t h e forward i ng link through the loop b ack ope r ation of BFD packets

BFD multi-hop detecti o n means that BFD c an detect any path betwe e n two s y s tems. T h ese paths m a y span many hops o r overl a p in some parts.

The linkage betw e en BFD and OSPF is to ass o c iate BFD with OSP F , a n d notify OSPF through BFD's rapid detection of link failures, thereby accelerating OSPF's r esponse to network topolo g y changes

BFD single-h o p detection refers to the IP connectivity dete c tion of two direct l y connect e d systems

63. Which of the following BGP attri b utes are not requi r ed to be included in the Update message of BGP

routing? (Mu l tiple choice) A. M ED

B. Local-Preference

C. AS_ PA TH D. Origin

64. Which of the following proto c ol uses TCP ports 443, 179, 137, 1 10, and 2 3 in orde r ? A. HTTP S , B G P , NetBios Na m e, Serve r , POP3, T elnet

B. LDA P , SNM P , TFT P , POP3, T elnet

C. BG P , P O P3, SNM P , T FT P , T elnet

D. HTTPS, S NM P , POP3, DNS, T elnet

E. Finge r , DHCP Serve r , NetBios Name Serve r , POP3, T elnet

65. Which of the following description of BGP neighbors are wr ong? (Multip l e questions) A. BGP router supports auto m atic neighb o r discovery

B. MD5 authentication must be confi g ured for BGP to establish neigh b ors

C. BGP needs to establish a UDP connection befo r e establishing neigh b ors

D. BGP needs to exchange link state information to establish neighb o r relati o nships

66. 1.Which of t h e following advan c ed features does BGP EVPN s u ppor t? A. ARP broadcast suppr e ssion

B. VRRP o ver VXLAN C. Multi-live gateway D. VXLAN Q os

67. When B GP EVPN T ype2 r o uting is used to transmit IRB type routi n g, w hat does the information carried include? (Multiple choice)

Host IP address

Host MAC address

Layer 2 VNI

Three-tier VNI

68. Reg a rd i ng the di f ference between NSR and N S F , which one is correct? A. NSR must rely on neighbori n g rou t ers to complete

B. Both NSR and N S F need neig h bor routers to complete

C. NSF must rely on neighbor r o uters to complete

D. NSF does not need ne i ghb o r route r s to complete

69. Reg a rd i ng the sliding wind o w of TCP, which of the following de s criptions are wrong? (Multiple

Choice)

After the r etransmissi o n tim e r expires, the sender has not r eceived the acknowledgement and will retransmit t h e unconfirmed data.

The sender does not n eed to t r ansmit a comple t e window size message.

TCP sliding wind o w allows mu l tiple packets to be sent before receiving an acknowled g ment

The sliding wind o w size can only be increased or left unchanged

The sender an n ounc e s the initial window size

70. Reg a rd i ng BGP/MP L S IP VPN r o uting interaction, which is wro n g i n the following de s cription?. A. The ingress PE will c o nvert the IPv4 route rece iv ed from the CE into a VPNv4 r oute, and save it according to di f ferent V P N instances

B. The exchange b etwe e n PE and CE i s IPv4 routing informati o n

C. After the e gress PE re c eives the VPNv4 route a d vertised by the ingress PE, i t f i lters the VPNv4 route according to the R T attri b ute carried b y the route

D. The egress PE can send IPv4 r outes to the remote CE through BG P , IGP or stat i c rou t ing

Page 8 of 12

71. If the O SPF protocol is running on the network, configure t he non-backbone area in the OSPP a r ea as the LSA with the ls-id of 0. 0 .0.0 in t he Totally S t ub Totally Stub ar e a. Which LSA does the LSA belong to?

LSA5

LSA2

LSA1

LSA3

72. Which of the following desc r iptions about the di f ferences b etween IGMP versions are correct? (Multiple choice)

For mem b ers to leave, IGMPv2 / v3 c an leave activel y , but IG M Pv1 cannot

I G MPv1/v2/v3 cannot support the SSM model

IGMPv1 does not support specif i c g roup queries, while IGMPv2 supports

IGMPv1/v2 cannot elect a querier by itself, while IGMPv3 can

73. As shown in the figure, an eng in eer uses 4 routers to conduct b ranch network interoperability t e sts. Among them, R1, R2, and R3 in bra n ch 1 deploy OSPF to a chieve network interope r abi l it y , and R2, R3, and R4 in b r anch 2 depl o y IS-IS t o achieve netwo r k interopera bi lit y .

Now the e n gineer w ants to implement R1 to access the loopback address of R4. Which of the following operations can meet this requiremen t ?

No confi g uration is re q uired

Advertise the default r o ute only in t h e OSPF process of R2

In the OSPF process of R2 and the IS-IS proc e ss, respect i ve l y advertise the default route

Advertise the default r o ute on l y in t h e IS-IS proc e ss of R2

74. After t h e BGP connection is s uccessful, then down, what are the rea s ons for the impossible? A. Open packet negotiation failed.

B. The mandatory attribute in the routing up d a t e message is lost.

C. After the BGP connection is established, the k e epalive pack e t is not received within the negotiated holdtime.

D. Received incorrect B G P packe t s .

75. Hu a wei S series swi t ches, If you need to spe c ify a member swit c h as the stack master switch, y o u can power o n this first s w itch 20 and then to the other membe r s of the po w er switch.

T rue

False

76. There is a new HW o f fice that needs to use their router as a DHCP s er v e r .

When configuring the D H CP serv e r to provide DH C P services f o r t he current o f fice, which of the followi n g items need to be configu r ed? (Multiple Choice)

Exclude u nused IP addresses from the DHCP server

Configure the timeout period of ping packets

Configure the s tartup file of the DHCP s er v er

Configure manual bin d ing

Configure DHCP ad d r e ss pool

77. Regarding route import, which of the following descriptions i s correct? (Multiple Choice)

There are two types of exte r nal rou t es imported by OSP

The first t ype of external route is preferr e d to the second type of external route.

Using the default-r o ute imported command in BGP is only u s ed to import the default route that alr e ady exists in the local IP routing table

When IS I S imports e x t ernal ro u tes, if the imported route type is not specifi e d, Level-1 routes will be imported by default on the L1/2 router

When IS I S imports e x t ernal ro u tes, if the imported route type is not specifi e d, Level-1 routes will be imported by default on the L1 router

78. Which of the following description of the 802.1s deployment features is correct? A. Multiple bridges share a spanning t r ee instance

B. All VLANs share a spanning tree i n stance

C. Each VLAN shares a spanni n g tree instance

D. Multiple VLANs share a spanning t r ee instance

79. In addition to statel e ss address a utoconfigura t ion, IPv6 devices can also obtain information such as add r esses, g ateways, and DNS thro u gh DHCPv6.

T rue

False

80. Regard i ng the description of t he extended features of ISIS, which of the following is c orrect? (Multiple C h oice)

If there a r e devices fr o m o t her manufacturers on the network that do not support the LSP fragmentation function, t h e fragment extension m o de must be c onfigur e d to Mode-1, ot h erwise the devices of o ther manufacturers cannot recognize the packet.

When the amount of information in the link state protocol data message PDU to be re l eased by ISIS is too large, the ISIS router will generate multiple LSP fragments to carry mo r e ISIS information.

After the r outer's LSP fragment extension function is enabled, you can use this function without restarting the IS I S proce s s .

ISIS can choose whether to perform authentication verificati o n on the rec e ived SNP and LSP pack e ts.

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81. H u awe i' s two switc h es, SWA and SWB, are connected th r ough s even Ethernet por t s and are configured w ith st a tic link agg r egation. The corres p onding p or t s on the switch SW are Et h ernet 1/0/2, Ethernet 1/0/3, Ethernet 1/0/4, and Et h ernet 1/0/5, Ethernet 1/0/6, and Ethernet 1/0/ 7 . The configuration mode is configured in the order of the ports. If the switch SWA a nd SWB support only 6 ports in each agg r egation gro u p.

Ethernet1/0/7 Unselected port w ith consistent p ort configur a tion

Ethernet1/0/6 Unselected port w ith consistent p ort configur a tion

In the c a s e that the c o nfigu r ations of the ports a re the same, the SWA randomly selects one of the seven ports as the aggr e ga t ion gr o up Unselected port.

Ethernet1/0/1 Unselec t ed port w hen the configurations of the ports are the same

82. Which of the following categories can ACL be divided into? A. Advanced ACL

B. Layer 2 A CL

C. User-defined ACL D. Basic ACL

83. Which of the following features does the IS- I S p r otocol ha v e? (Multiple c h oice) A. Does not support net w ork e lement level division

B. Su i table for large-c a p acity routing delivery

C. The bottom layer is t h e data link layer

D. Good scalability

84. A router have received a c o mmunity attribute of a No-Export of BGP routing, how d o es the router deal with the BGP routing?

Discard the route directl y .

No longer communicate to other BGP routers.

Only advertise to IBGP neighb o rs.

properly a dvertise the rout e , but do not use the routing to forward d ata.

85. 1 6 8.2.1, 192.1 6 8.3.1 and 1 9 24.1 r espectivel y .

If the OSPF protocol is e nabled on the 4 routers at the same t i me, the BDR selected by OSPF is . A. R TB

B. R TC C. R TD D. R T A

86. Assume that the BGP/MPLS IPv4 VPN, OSP F , LDP and Static routing are configu r ed on the PE. Which of the following pr o tocols are required to co n figure to en a ble the GR to ob t ain NSF function? (Multiple C h oice)

OS P F

M PLS LDP

BGP

Stat i c rou t ing

87. An MSTP swi t ch treats an RSTP s w i tch as an MSTP domain consist i ng of a single switch. The

MSTP switch resolves the RSTP B PDU to an MST BPDU, where the I R PC i s 0. A. True

B. False

88. In the lab network, the network is b uilt as follows. SW1 is t h e default configuration a n d SW2 disables

ST P . Which of the following description about scenario is correct?

G0/0/2 of sw1 en t ers Discarding st a te

G0/0/1 of sw2 en t ers Discarding st a te

G0/0/2 of sw2 en t ers Discarding st a te

No interface is blocked

G0/0/1 of SW1 en t ers Discarding state

89. ISIS IPv6 cost 50 is configur e d on the interface. What is the m eaning of this comma n d? A. I S-IS o f t h e interface

B. The I S-IS cost o f the i n terface is both 50 and the cost is both 60

90. Which of the following is optimal for building a loop-fr e e Layer 2 networ k ? A. Stacking + link aggre g ation

B. TRILL+MSTP

C. Sta c k ing + MSTP

D. Link Aggregation + MSTP

Page 10 of 12

91. What is wro n g ab o ut the descri p tion of the pe r manent multicast address? A. All routers running PIM pro t ocol listen to 224.0. 0 .100

B. All routers li s ten on 2 2 4.0.0.2

C. All hosts a nd routers in the network segment listen to 224.0.0.1

D. All routers running O S PF p rotocol listen on 224.0.0.5

92. If we c onfigure a VPN instance o n the r o ute r , i f we ne e d to view the VPN route on t h e Hu a wei ro ute r , which of the following commands should be used?

display ip routing-t a ble vpn-instance vpn -instance-name

display

display vpn routing-t a ble ip vpn-instance

93. W hich of the following description is wrong ab o ut BGP route se l ection? A. Non-agg r egated r o ut e s take precedence over a ggr e gated r o ute s .

B. In the case where Pref-Val and local_prefe r ence are equal, if t he BGP preference of the locally generated route, the IB G P route, and the EBGP r o ute are the sa m e, the locally generat e d valid route takes precedence.

C. See the f o llowing entry in the BGP r outing table: * 172.16. 1 .11/32 0.0.0.0 10 0? Ind i cates that the r o u t e is available non- o ptimal.

D. The route that is unre a chab l e for nexthop is an invalid rou t e and does not participate in the prefer e nce.

94. Which of the following configuration of OSPFv3 route ag gr egation is correct? A. [Huawei] ospfv3 1

[Huawei - ospfv3-1] area 1

[Huawei - ospfv3-1-a r ea - 0.0.0.1] abr- summary fc0 0 : 0: 0 : : 48 c o s t 400

B. [Huawei] i nterface g igabitethernet 1 / 0/0

[Huawei - Gi g abitEtherne t 1/0/0] asbr-surmary fc00: 0: 0: : 48 co s t 20

C. [Huawei]ospfv3 1

[Huawei - ospfv3-1] asbr-surmary f c 00: 0 : 0: : 48 3 c o st 20 tag 1 00

D. [Huawei]ospfv3 1

[Huawei - ospfv3-1] abr-su r mary fc00: 0: 0: : 48 cost 400

E. [Huaweilospfv3 1 [Huawei - ospfv3-1] area 1

[Huawei - ospfv3-1-a r ea - 0.0.0. 1 ] asbr- s umary£c00: 0: 0: : 48 c ost 20 tag 100

95. The base AC add r ess of a PC is 548 9 98FB 65D8. The a d ministrator wants this PC to obtain the specified IP add r ess 192.168. 1 1/ 2 4 from the DHCP serve r , so the command configured b y the administrator should be .

dhep static -bind ip address 192.1 6 8.1. 1 1 mac-address 5489 -9 8FB-6 5 D8

dhep static -bind ip address 192.1 6 8.1. 1 1 24 m a c- address 5 4 89 - 98FB-6 5 D8

dhep server static -bind ip address 192.1 6 8 . 1. 1 1 255.255.2 55 .0 mac- address 5489-9 8 FB- 65D8

dhep server static-bind ip-add r ess 192.168.1. 1 1 mac- addre s s 5489-98F B - 65D8

96. Which scenario can us e AS-path -filter? A. apply clause in Route-policy

B. I f-match c l au s e in Rou t e-policy

C. Filter the r oute sent to the BGP neighbor accord i ng to the A S_PATH attribute carried in the route. For example, the command peer x.x. x .x a s-path-filter export

D. Filter the r oute received to the BGP neighb o r according to t he AS_PATH attribute carried in the rou t e. For example, the command peer x.x.x.x as-path-filter import

97. What is the d efault aging time of the MAC address table of Hua w ei switches in seconds? A. 400

B. 500

C. 300

D. 5

98. Reg a rd i ng the char ac teristics of CE dual-ho m ing, which of the f ollowing statement is incorrect?

CE a ccesses the backbone n et w o r k through two links. These two links can be used f o r load shar i ng or as active and standby links.

CE and PE form a CE dual- h oming network, wh i ch can ensure h i gh network availabilit y .

The VRFs of two PEs connected to the same CE can belong to d i f ferent V PNs.

In CE dual-homing ne t working, l oops may o cc u r , and route-ta g s can be used to solve loop p r oble m s.

99. In an MPLS VPN network, di f ferent CE devic e s can exchange r o ut i ng information w ith the same PE device using di f ferent routing protocols. The routing protocols used betw e en di f ferent CE devices and the same device are inde p e n dent of each othe r .

T rue

False

100. Which of the following sta t ements about OSPF route filtering is incorrect?

In the NSSA area, the filte r ing for the import and communication of extern a l rou t es can be do n e on the ASBR or on t he AB

The filtering for the three types of L SAs needs to be confi g u r ed on the ABR betwe e n OSPF areas

Backbone interface filtering LS

Y ou can filter in and out di r ections. All L SAs e xcept Grace LSA

Based on the link s t ate database. When cal c ulating the rou t e, use the filter- p olicy im p ort command. This filtering method only a f fects the route addition in the r o uting table, and has no e f fect o n the OSPF l ink state database

Page 11 of 12

101. As shown in the figure, in the h u b&spoke multicast mode of MPLS bgp VPN, in order to realize that the branch can only communicate with the headquarters, the branches cannot commun i cate with each othe r . Which of the following schemes can the R T be set?

Headquarters: Import T arget: 12:3 Export T arget: 12:3 Branch 1: I m port T arget: 12:3 Export T arget: 12:3 Branch 2: I m port T arget: 12:3 Export T arget: 12:3

Headquarters: Import T arget: 1:1 Export T arget: 3:3 Branch 1: I m port T arget: 3 :3 Export T arget: 1:1 Branch 2: I m port T arget: 3 :3 Export T arget: 2:2

Headquarters: Import T arget: 2:2 Export T arget: 3:3 Branch 1: I m port T arget: 3 :3 Export T arget: 1:1 Branch 2: I m port T arget: 3 :3 Export T arget: 2:2

Headquarters: Import T arget: 12:3 Export T arget: 3:12 Branch 1: I m port T arget: 3:12 Export T arget: 12:3 Branch 2: I m port T arget: 3:12 Export T arget: 12:3

102. Application of the two-speed d o u ble-b a rrel in tra f fic policing, the number of tokens in the C bucket is TC, a number of tokens in P bucket i s T P . When a packet of le n g th B enters, which of the following statements is correct? (Multiple choice)

If TP-B>0 and TC-B>0, t he packet is marked as gre e n.

If TP-B>0 and TC-B<0, the packet is marked as yello w .

If TP-B<0 and TC-B<0, the packet i s marked as red.

If TP-B>0 and TC-B<0, the packet i s marked as green.

103. When d eploying BGP/MPLS IP VP N , when two VPNs have a common si t e, the common site m u s t not use overlapping address spa c es w i th other sites of the two V P N s .

TRUE

F ALSE

104. As sh o wn in the configura t ion, if the administrator config u res OSPF on R1 but R1 cannot lea r n the routes of other routers, what are the p ossible reasons? (Multiple Choice)

[R1] ospf

[Rl-ospf-1] area 2

[R1-ospf-1 -a rea - 0.0.0.2] network 10. 0. 13.1 0.0.0.0

The area ID configured by this router is different from the area ID of its neighbor r o uter.

This router is not configur e d with an OSPF pro c ess I

The rout e r's anno u nc e ment ne t wo r k address does not match the interface mask

This router is not conf i gured with authentication, but the n eighbor r o uter is configured with authentication.

105. Which of the following statemen t s about VPNv4 add r esses is wrong?

B y default, PE will not perf o rm VPN-target filtering on rec e ived VPNv4 routes.

Before the local PE advertis e s the VPNv4 routes learn e d from the sites di r ectly conne c ted to it to oth e r PEs, it will set the Export T arg e t attri b ute for these routes a nd a dvertise them with the routes as the extended community a ttribute of BG

When BGP advertises reachab l e a n d unr e achab l e VPNv4 routes, i t will carry the RD attribute.

The VPNv4 add r ess has a total of 1 2 bytes, incl u ding the 8- b y te Route Distingulisher ( R D) and the 4-byte IPv4 add r ess prefix.

106. The topology of a multi-p r otocol netw o rk is shown in the figu r e. Please study the topology carefull y . The router ( i n Area 1 ) imports the routes learned th r ough BGP i n to the OSPF process. Th e n, what types of LSAs will R3 generate to advertise to area 0?

T ype 5 LSA

T ype 7 LSA

T ype 1 LSA

T ype 4 LSA

Class 2 L AS

107. T o achieve the tra f fic fil t e ring function, you can use tra f fic-filter o r MQC. Compared with tra f fic-f i lte r , MQC can be called in m o re views.

TURE

F ALSE

108. If there i s a run 802.1D spanning t ree protocol Local Area Network. Which of the foll o wing paramet e rs does non - r oo t switch not receive from the root swit c h?

MaxAge

Root co s t

Forward d elay

Hold time

Hello time

109. Which of the following is not the role of EVPN T ype2 routi n g? A. Host MAC address Announcem e nt

B. Host ARP Announce m ent

C. BUM message forwa rd ing

D. Host IP route Announ c ement

110. Which of the following options may a f fect the establishment of IBGP neighbors? (Multiple Choice) A. Authentication is unsuccessful

B. The BGP protocol version is inconsistent

C. IBGP-Mu l ti-hop is not configured D. IGP routi n g is unreachable

Page 12 of 12

111. W hich of the following scenarios d oes not need to use RPF dete c tion? A. When establishing a shar e d tree to the RP in PIM SM

B. When the router in PIM SM re c eiv e s the multicast data stream

C. When receiving a pru n ing message in PIM SM

D. When the RP in the P I M SM e stablishes a source tree to the multicast so u rce

112. When DLDP detects a unidirectional link on an i nterface, t h e default ope ra tions on Hu a wei devices include: DL D P switches to the interface to Disable state, gener a tes a trap and sets the interface state to DLDP Do w n.

TRUE

FAL S E

113. IPSG c a n c onfigure s tatic bind i ng table or u s e DHCP- s n oo ping to form a binding table. A. T rue

B. False

114. In the command aggregate ipv4-address {mask | mask-length} [ a s -set | attribute-pol ic y route- p olicy-name1 | detail-suppressed | origin-pol i cy route-policy-name2 | supp r ess-policy

route-policy-name3], multiple pa r ame t ers can be used to influe n ce the summary rou t e and its results. What is the correct description about this comma n d? (Multiple Choice)

If the Suppress policy i s configured, the aggregated route i s generated. The if-ma t ch c l ause of the route- p olicy is used to select the detailed route to b e suppre s sed. The detailed route matching the route- p olicy is still advertised to other BGP neigh b ors.

If the Origin-policy is c o nfigured, on l y the detailed routes matching the R o ute-policy c a n participate in the aggr e gat i on.

If Attribute-policy is co n figured, you can change the attributes of the aggr e gated route.

If As - set i s configured, AS_A T H of t he summary route contai n s AS path information of all specific routes to prevent routing loops.

115. Which of the following descriptions of MED is correct? (Multip l e questions) A. The default value of MED is 100

B. MED can only be deli v ered within this AS

C. MED is a n optional n o n-transitional attribute

D. The defa u lt value of MED is 0