HCIP-Datacom-Core Technology V1.0 H12-821_V1.0 Real Questions and Answers

test2022-03-15T06:10:50+00:00

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1. Which of the following TLVs is used by ISIS to describe the IP address of an interface?

129

131

128

132

2. DRAG DROP

What is the correct procedure for a VLAN pool to assign terminals to VLANs.

3. A switch runs MSTP. The configuration is shown in the figure .

What is the role of this switch in MSTI 1?

Uncertain

Root switch

Non-root switch

Secondary root switch

4. Which of the following is the default interval at which the DIS on a broadcast IS_IS network sends CSNPs.

3.3

5. OSPF supports area authentication and interface authentication. If both authentication modes are configured, Interface authentication takes preference over area authentication.

TRUE

FALSE

6. Which Of the following IEEE 802.11 standards is also known as Wi-Fi 6?

802.11ac

802.11n

802.11ax

802.11b

7. When a routing policy is used to filter routes, which of the following route prefixes will be denied by the IP prefix below?

1.1.1.1/26

1.1.1.2/16

1.1.1.1/32

1.1.1.1/24

8. Which of the following statements regarding DR/BDR are false?

In a broadcast network, DR and BDR must be elected. A broadcast network without a DR or BDR cannot operate normally.

DR others listen on the multicast address 224.0.0.5.

All DR others establish neighbor relationships with DR and BDR only.

DR others listen on the network address 224.0.0.6.

9. Which of the following statements regarding the LSA age field are true?

The unit of this field is seconds. In a LSDB, the LS age of a LSA increases with time.

If the LS age of a LSA has reached the LSRefreshTime (30 minutes), any router can regenerate an instance of this LSA again.

The unit of this field is seconds. In a LSDB, the LS age of a LSA decreases with time.

If the LS age of a LSA has reached the LSRefreshTime (30 minutes), the originator of this LSA needs to regenerate an instance of this LSA again.

10. An engineer sets the CAPWAP heartbeat detection interval to 20 of the active link before an active/standby switchover occurs?

75s

20s

60s

90s

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11. The Interface P address and VRRP virtual IP address can be the same.

TRUE

FALSE

12. RSTP provides different functions in different scenarios .

Which of the following statements Is false?

After TC-BPDU attack defense function is enabled, you can set the number of times the switch processes TC BPDUs within a certain period

The role of the designated port that is enabled with root protection cannot be changed

If the edge port on the switch enabled with BPDU protection receives RST BPDU, the switch sets the edge port as a non-edge-port and triggers STP calculation

When the designated port enabled with root protection receives optimal RST BPDUs, the port enters the Discarding state and does not forward packets. If the port does not receive optimal RST BPDUs within a certain period of time, the port will automatically restore to the Forwarding state

13. Which of the following statements regarding different LSA types is false?

LS Request packets contain only LS Type, LS ID, and Advertising Router.

LS Ack packets contain complete LSA information.

DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.

LS Update packets contain complete LSA information.

14. 1.BFD control packets are encapsulated in UDP packets for transmission .

What is the destination port number of multi-hop BFD control packets?

4784

3784

5784

2784

15. CORRECT TEXT

There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets. (Use lowercase letters.)