Nokia 4A0-112 Exam Dumps

Get All Nokia IS-IS Routing Protocol Exam Questions with Validated Answers

4A0-112 Pack
Vendor: Nokia
Exam Code: 4A0-112
Exam Name: Nokia IS-IS Routing Protocol
Exam Questions: 40
Last Updated: October 6, 2026
Related Certifications: Nokia Network Routing Specialist II
Exam Tags: Network Routing Professional Level Nokia Network EngineersNokia Network Analysts
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Free Nokia 4A0-112 Exam Actual Questions

Question No. 1

Refer to the exhibit.

All routers in the diagram are running a link-state routing protocol. Before the link failure, all routers have operational adjacencies with each other and there is a BFD session between routers R1 and R3. After the link failure, which of the following affects the routing protocol's convergence time?

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Correct Answer: C

BFD (Bidirectional Forwarding Detection) is used to detect link failures quickly and helps improve convergence time in link-state routing protocols. The BFD session between routers R1 and R3 allows them to detect the failure of the link between them more quickly than the regular routing protocol hello timers. The transmit interval, receive interval, and multiplier settings determine how fast BFD detects a failure and triggers the routing protocol to converge, which directly impacts the convergence time.


Question No. 2

Which of the following is a valid alternative representation of the IPv6 address

2001:0da8:0000:0000:0024:0000:4ab9:0300?

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Correct Answer: A

In IPv6, consecutive sections of zeros can be abbreviated with a double colon (::) once in an address. Also, leading zeros in each hextet (group of four hexadecimal digits) can be removed.

The original address is 2001:0da8:0000:0000:0024:0000:4ab9:0300.

Removing leading zeros and applying the abbreviation:


Question No. 3

Refer to the exhibit.

In the diagram, all routers are using IS-IS as their routing protocol. The number next to each link is its metric value.

What path will traffic follow from router R1 to router R7, and from router R7 to router R1?

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Correct Answer: A

From R1 to R7: The path will be R1 R2 R4 R6 R7 because this path has the least cumulative metric of 10 + 10 + 10 + 10 = 40.

From R7 to R1: The reverse path will follow R7 R6 R4 R2 R1 because it is the shortest return path with the same metrics.


Question No. 4

There are several differences between IS-IS Hello packets used on broadcast interfaces and on point-to-point interfaces.

Which of the following statements is FALSE?

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Correct Answer: C

In both broadcast and point-to-point interfaces, IS-IS routers identify neighbors using system IDs, not interface MAC addresses. The system ID is a unique identifier assigned to each router, and it is used to identify neighbors in both types of interfaces.


Question No. 5

Which of the following statements about IS-IS is FALSE?

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Correct Answer: B

In IS-IS, routers are actually associated with interfaces rather than the entire router being associated with a single area. A router can have interfaces in multiple areas, and it is the interface's configuration that determines which area it belongs to.


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