Free Access Huawei.H12-821_V1.0-ENU.v2025-03-17.q157 Practice Test (Page 13)

Question 56

Which of the following descriptions about the router's LSA processing principles are correct? (Multiple choice)

A.If the received LSA is damaged, such as Checksum error, the LSA will not be received

B.If multiple instances of an LSA are received, the priority is to check whether the checksums are the same, if not, the larger one is preferred

C.If an LSA already exists in the local LSDB of the router and an updated LSA is received at this time, the local LSDB will be updated and the updated LSA will be flooded out

D.If the router receives an LSA that does not exist locally, it updates the LSDB and uses DD packets to flood the LSDB

Question 57

RSTP defines four port roles, among which the Port role values of the Alternate port and the Backup port are consistent in the Flags field of the message, which is 01.

A.TRUE

B.FALSE

Question 58

As shown in the figure, three first-tier switches are interconnected with one HUB, and the STP function is enabled on the switches. Please refer to the figure below for the STP bridge ID settings of the switches. Others are default configurations.

Which option is incorrect in the following description?

A.Both ports of SWA are designated ports and are in forwarding state.

B.The go/1 port of SWC is an Alternate port, which is blocked

C.SWA is the root bridge in this simple network

D.The G/0/2 port of SWA is blocked.

Question 59

Which of the following does not belong to the OSI network management model?

A.Management Model

B.Communication Model

C.Organizational Structure Model

D.Functional Model

Question 60

As shown in the figure, in the network running the RSTP protocol, the original root port of SWC fails and the port is in the Down state. At this time, which of the following processes will the network go through to achieve stability?

A.SWC re-elects the root port and enters the Forwarding state after Learning

B.The standby port on the SWC becomes the new root port and directly enters the Forwarding state

C.The standby port on the SWC becomes the new root port and enters the Forwarding state after going through the Learning state

D.SWC re-elects the root port and directly enters the Forwarding state

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Question 56

Question 57

Question 58

Question 59

Question 60

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