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Nokia IS-IS Routing Protocol Sample Questions (Q12-Q17):

NEW QUESTION # 12
Refer to the exhibit.

All routers in the diagram are running an interior gateway protocol (IGP) and have been configured with an ECMP value of 4. Router R5 advertises the prefix 192.168.3.0/24 using the IGP. Assuming all links have the same cost, how many entries for prefix 192.168.3.0/24 will be in router R3's routing table?

A. 0
B. 1
C. 2
D. 3

Answer: B

Explanation:
In this scenario, the routers are configured with an Equal-Cost Multi-Path (ECMP) value of 4, meaning they can utilize up to 4 equal-cost paths to reach a destination. Since Router R5 is advertising the 192.168.3.0/24 prefix and all links have the same cost, router R3 will receive multiple routes to reach this destination.
Given that all the routers (R1, R2, R3, R4, and R5) are connected in a way that can support multiple equal-cost paths, and assuming ECMP is set to 4, the routing table on Router R3 will have up to 4 entries for the prefix 192.168.3.0/24.
Thus, Router R3's routing table will contain 4 entries for the prefix 192.168.3.0/24.

NEW QUESTION # 13
Which of the following is NOT a required configuration step to successfully run IS-IS on a router?

A. The IS-IS context needs to be enabled.
B. Layer-3 interfaces that will participate in IS-IS need to be identified.
C. The router needs to be associated with an IS-IS area ID.
D. A reference bandwidth needs to be configured to calculate link costs.

Answer: D

Explanation:
While configuring a reference bandwidth (which is used to calculate link costs) can be useful, it is not strictly required for IS-IS to run. IS-IS uses default bandwidth values to calculate costs, and it can function without explicitly configuring a reference bandwidth.

NEW QUESTION # 14
Which of the following statements about IS-IS is FALSE?

A. IS-IS uses the concept of level-1 and level-2 routers to implement hierarchy.
B. In IS-IS, routers are associated with an area, not the interfaces.
C. A level-1 router forwards traffic to other areas through the nearest I eve I-1/1 eve I-2 router.
D. A router becomes level-2 when it is associated with the backbone area.

Answer: B

Explanation:
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.

NEW QUESTION # 15
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 router R2 but not on router R1.
B. Route leaking is configured on router R1 but not on router R2.
C. There is no route leaking configured on router R1 or router R2.
D. Route leaking is configured on both routers R1 and R2.

Answer: D

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 # 16
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?

A. The time taken by the switches to detect that the physical ports are down.
B. The value of the BFD transmit interval, receive interval and multiplier settings on routers R1 and R3.
C. The value of the routing protocol hello timers on routers R1 and R3.
D. The value of the Ethernet hello timers on the switches.

Answer: B

Explanation:
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.

NEW QUESTION # 17
......

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Reliable Nokia 4A0-112 PDF Questions Pass Exam With Confidence

Quiz High-quality 4A0-112 - Test Nokia IS-IS Routing Protocol Questions Vce

Nokia IS-IS Routing Protocol Sample Questions (Q12-Q17):

Free PDF Quiz Nokia - 4A0-112 Latest Test Questions Vce