Question 1

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

Options :

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

Answer: B

Question 2

Which of the following statements about the forwarding plane of a switch is false?

Options :

A : Provides high-speed and non-blocking data channels.

B : Can encapsulate and decapsulate packets.

C : Can collect packet statistics.

D : Consists of main control boards and interface boards.

Answer: D

Question 3

See the network shown in the following figure.

R1 and R2 run IS-IS and establish an adjacency. IS-IS is enabled on Loopback0 of R2 but disabled on Loopback3 of R2. The configurations shown in the figure are performed in the IS-IS process of R2. Which of the following statements are true?

Options :

A : The routing table of R1 contains the route 10.0.2.3/32.

B : The routing table of R1 does not contain the route 10.0.2.3/32.

C : The routing table of R1 does not contain the routes 10.0.2.2/32 and 10.0.2.3/32.

D : The routing table of R1 contains the route 10.0.2.2/32.

Answer: B,D

Question 4

Which of the following statements regarding OSPF route summarization is false?

Options :

A : OSPF supports two route summarization modes: ABR summarization and ASBR summarization.

B : Any router in OSPF can summarize routes.

C :

Route summarization is the process of summarizing routes with the same prefix into one route and then advertising only the summarized route to other areas

D :

Route summarization can reduce routing information, decrease the routing table size, and improve router performance.

Answer: B

Question 5

Both MQC and PBR can be applied on device interfaces to filter received and sent packets or control packet forwarding paths.

Options :

A : TRUE

B : FALSE

Answer: A

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