Huawei Huawei Certifications H12-821 Questions & Answers

• Question 1:

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

  

  A. 1.1.1.1/26

  B. 1.1.1.2/16

  C. 1.1.1.1/32

  D. 1.1.1.1/24

  Correct Answer: D

• Question 2:

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

  A. 129

  B. 131

  C. 128

  D. 132

  Correct Answer: D

• Question 3:

  According to BGP route selection rules, the route with the higher Local_Pref is preferred.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 4:

  Which of the following statements is false?

  A. If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.

  B. A device with a higher router priority has a higher election priority.

  C. When a router with the highest router priority joins an OSPF network, this router will become the new DR.

  D. If two devices have the same router priority, the device with a larger router ID has a higher election priority.

  Correct Answer: A

• Question 5:

  In a route-policy, which of the following BGP attributes can be used in apply clauses?

  A. MED

  B. AS_Path

  C. Tag

  D. Local-Preference

  Correct Answer: ABD

• Question 6:

  If a router ID is configured in both the system via and the BGP view, BGP uses the router ID configured in the BGP view because the BGP view takes precedence over the system view.

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 7:

  Which of the following statements regarding the summary automatic command and BGP route summarization is false?

  A. After this command is configured, BGP sends only the summarized routes to peers

  B. This command is used to implement automatic summarization. Automatic summarization takes precedence over manual summarization

  C. This command enables automatic summarization for the locally imported routes

  D. After this command is configured, BGP summarizes routes based on natural network segments

  Correct Answer: D

• Question 8:

  Which of the following statements about WLAN roaming are true?

  A. APs for roaming do not need to have overlapping signal coverage.

  B. APs for roaming must be in the same extended service set (ESS).

  C. APs for roaming must have overlapping signal coverage.

  D. APs for roaming must be in the same basic service set (BSS).

  Correct Answer: A

• Question 9:

  A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true?

  

  A. The circuit level of S4/0/0 is Level-1.

  B. S4/0/0 supports IPv6.

  C. S4/0/0 sends IIH packets at the interval of 30s.

  D. The cost of S4/0/0 is 20.

  Correct Answer: C

• Question 10:

  RSTP provides different functions in different scenarios. Which of the following statements Is false?

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

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

  D. 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

  Correct Answer: C