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Nokia 4A0-112 exam covers different topics related to the IS-IS routing protocol, including protocol concepts, configuration, operation, and troubleshooting. 4A0-112 exam also tests the candidate's knowledge of other related protocols, such as OSPF and BGP. Candidates who Pass 4A0-112 Exam demonstrate their ability to design, implement, and troubleshoot complex network routing solutions using the IS-IS protocol.

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Nokia IS-IS Routing Protocol Sample Questions (Q38-Q43):

NEW QUESTION # 38
A routing domain uses a link-state routing protocol. Which of the following would NOT be an advantage of dividing the entire routing domain into areas?

A. Detailed topology information is only shared among routers within the same area, thus reducing the complexity of the SPF calculation.
B. Less-capable routers can be isolated from having to keep track of IP prefixes that are external to the local routing domain.
C. Fewer routers are required to handle the same amount of traffic, as compared to a single-area domain.
D. Route tables can be reduced by summarizing the IP prefixes advertised between areas.

Answer: C

Explanation:
Dividing a domain into areas typically does not reduce the number of routers needed to handle traffic. It is more focused on improving scalability, reducing the size of routing tables, and limiting the scope of SPF calculations, but it doesn't inherently reduce the number of routers required.

NEW QUESTION # 39
Refer to the exhibit.

Static routing is to be used in a network between a corporate head office and a branch office. The head office has many connected subnetworks, whereas the branch office has one subnetwork and a single connection to the head office. Which of the following is the most likely configuration on the head office and branch office routers?

A. The head office and the branch offices both have specific static routes.
B. The head office has a specific static route and the branch office has a default route.
C. The head office and the branch office both have default routes.
D. The head office has a default route and the branch office has a specific static route.

Answer: D

Explanation:
The head office has many connected subnetworks, so it will typically have a default route to forward traffic to the branch office (or external networks), since it may not need to define static routes for each branch network.
The branch office, which has only one subnetwork and a single connection to the head office, will have a specific static route to reach the head office subnet or other subnets at the head office, since it only needs to know the specific route to reach the head office's network.

NEW QUESTION # 40
Consider the exhibit.

All routers are running IS-IS with IPv6 support enabled. Based on the topology shown, and the route tables of routers R3 and R4, which of the following statements is TRUE?

A. Route leaking is configured on both routers R1 and R2.
B. Route leaking is configured on router R2 but not on router R1.
C. There is no route leaking configured on router R1 or router R2.
D. Route leaking is configured on router R1 but not on router R2.

Answer: A

Explanation:
Based on the IPv6 route table output for R3 and R4, we can see that the routers have remote routes listed as "Remote ISIS", indicating that the route is being advertised from a different area (area 49.01 or 49.02). This is a sign of route leaking, where routes from one area are being shared across areas.
The routes from R3 (level-1 router) are being advertised to R4 (level-1 router), and vice versa, with ISIS as the protocol. This implies that there is route leaking configured to allow information to pass between areas.

NEW QUESTION # 41
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 R6 to router R3, and from router R3 to router R6?

A. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R2-R5-R6).
B. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R7-R5-R6).
C. Router R6 to router R3 will follow (R6-R5-R7-R4-R3). Router R3 to router R6 will follow (R3-R4-R7-R5-R6).
D. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R2-R5-R6).

Answer: A

Explanation:
The metric values between the routers dictate the routing paths, and IS-IS will calculate the shortest path based on these values.
R6 to R3: The path from R6 to R3 will go through R5 and R2, as this route has the least cumulative metric (10 + 10 + 15 = 35).
R3 to R6: The reverse path from R3 to R6 will follow R3 → R2 → R5 → R6 because this route is also the shortest with a total metric of 10 + 10 + 10 = 30.

NEW QUESTION # 42
A series of actions are triggered on a router as a result of enabling both loopfree-alternate for a link-state routing protocol and ip-fast-reroute. Which of the following is NOT one of those actions?

A. Enabling the router to locally repair the active path to an IP prefix in case of failure.
B. Calculating a backup next hop for each known IP prefix, if it exists, that would not create a routing loop if used without informing other routers.
C. Calculating the shortest-path next hop for each known IP prefix.
D. Installing two entries in the FIB for IP prefixes, one active and one in standby mode.

Answer: C

NEW QUESTION # 43
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