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NRS II Composite Exam: IS-IS version Practice Questions

NRS II Composite Exam: IS-IS version

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Question 1

A router running a link-state routing protocol detects that one of its neighbors is no longer connected to it. The router generates a new link-state advertisement to inform other routers of the topology change. Which of the following is NOT an action that is triggered by this event?

Every router that receives the new link-state advertisement acknowledges it, stores it and forwards it to its own neighbors.
If multiple copies of the new link-state advertisement are received, all of them are acknowledged.
Every router that receives the new link-state advertisement updates its sequence number before forwarding it.
Every router that receives the new link-state advertisement runs the SPF algorithm to recalculate its shortest-path tree and its forwarding database.

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Question 2

The link-state database of a link-state routing protocol includes both topology information and IP reachability information. How would you know if a piece of information is topology information?

It has to do with router interconnection.
It has to do with internal subnet prefixes.
It has to do with external subnet prefixes.
It has to do with link costs.

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Question 3

Which of the following statements about link-state protocols is FALSE?

Each router populates its link-state database with updates received from neighbors.
The link-state database is identical for all routers in a single-area routing domain.
An SPF computation is done by each router to determine the best path to destination prefixes.
After performing an SPF computation, each router shares its routing table with its neighbors.

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Question 4

Which of the following is NOT a characteristic of a floating static route?

The primary and backup routes are created for the same IP prefix.
The primary and backup routes appear in the routing table.
The backup route is configured with a higher metric value.
The next-hop of the primary and backup routes are different.

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Question 5

Consider the exhibit. Routers R1 through R4 are running an IGP in such a way that they have each other's system IP addresses in their routing tables. Static routes need to be configured on routers R1 and R2 so that they can reach subnetwork 10.4.100.0/24. The network administrator decides to use indirect static routes in both cases. Which of the following would NOT be a correct decision?

Using R4's system IP address as the indirect IP address on both routers R1 and R2.
Using R2's system IP address on router R1 and R4's system IP address on router R2 as the indirect IP address.
Using R3's system IP address on router R1 and R4's system IP address on router R2 as the indirect IP address.
Using R3's system IP address as the indirect IP address on both routers R1 and R2.

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Question 6

Which of the following statements about router interfaces on a Nokia 7750 SR is FALSE?

They can be used in pairs on the same subnet for redundancy.
They can be assigned IPv4 and/or IPv6 addresses.
They can be logical or physical.
The system interface exists by default.

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