4A0-C01 Certification Exam Questions with AI Explanations

QUESTION: 166

Click on the exhibit.

Given the contents of the LSPs from routers R1 and R2, which of the following is TRUE?

Router R1 summarizes the prefixes from router R3 as 192.168.0.0/16 and router R2 does not summarize the prefixes.
Router R1 does not summarize the prefixes from routers R3 and R2 summarizes them as 192.168.0.0/16.
Router R1 summarizes the prefixes from router R3 as 192.168.0.0/20 and router R2 does not summarize the prefixes.
Router R1 does not summarize the prefixes from routers R3 and R2 summarizes them as 192.168.0.0/20.
Both routers R1 and R2 summarize the prefixes from R3 as 192.168.0.0/20.
Neither router R1 nor router R2 summarizes the prefixes from router R3.

Answer(s): E

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QUESTION: 167

What are the three databases that are maintained by a link-state protocol?

Neighbor, adjacency, routing.
Neighbor, topology, forwarding.
Topology, routing, forwarding.
Topology, forwarding, traffic classification.
Neighbor, adjacency, forwarding.

Answer(s): B

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QUESTION: 168

Which of the following about IS-IS level hierarchies is FALSE?

Level 2 routers interconnect the Level 1 areas.
There must be a contiguous Level 2 backbone to enable routing throughout the entire network.
Level 1 routers send packets to the nearest L1/L2 router if the destination is in a different area
Level 2 routers store the Level 1 and Level 2 topology information in a single database.

Answer(s): D

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Click on the exhibit button below. Assume the following:

- The protected path is R1-R2-R3-R6.
- Fast reroute one-to-one protection is enabled.
If the original LSP already has two labels, and router R2 has failed, how many labels will there be in packets on the detour path?