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Valid 4A0-112 Test Cram, Reliable 4A0-112 Exam Prep

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Nokia IS-IS Routing Protocol Sample Questions (Q22-Q27):

NEW QUESTION # 22
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 has a specific static route and the branch office has a default route.
B. The head office has a default route and the branch office has a specific static route.
C. The head office and the branch offices both have specific static routes.
D. The head office and the branch office both have default routes.

Answer: B

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 # 23
Which of the following is NOT a function of the control plane a router?

A. To utilize the forwarding tables to forward data packets towards their destination.
B. To exchange signaling messages with other routers.
C. To determine the best way to forward packets.
D. To establish routing paths to deliver packets from source to destination and to reestablish them in case of failure.

Answer: A

Explanation:
The data plane (or forwarding plane) is responsible for actually forwarding the data packets. It uses the information stored in the forwarding table to determine how to move packets from one interface to another toward their destination.

NEW QUESTION # 24
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. A reference bandwidth needs to be configured to calculate link costs.
D. The router needs to be associated with an IS-IS area ID.

Answer: C

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 # 25
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 R1 but not on router 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 both routers R1 and R2.

Answer: D

Explanation:
From the route tables of R3 and R4, we can see that remote routes are present, with R3 and R4 both having routes referencing routers in different areas (Area 49.01 and 49.02). These remote routes are characteristic of route leaking, which is the process of sharing routes between different IS-IS areas.
R3 has routes for R1, R2, and R4, which are in Area 49.01, suggesting that R1 and R2 have advertised their routes to R3, possibly due to route leaking.
R4 has similar routes for R2 and R3, indicating that R2 might have advertised its routes to R4.
This sharing of routes between areas is indicative of route leaking being configured on both R1 and R2, allowing these routes to be shared across the areas.

NEW QUESTION # 26
A routing domain is using a single-area link-state routing protocol. Which of the following is NOT information that a router can share with other routers in the domain using protocol-specific messages?

A. The IP prefixes of subnets directly attached to the router.
B. The local router ID and the router IDs of neighboring routers.
C. IP prefixes known by the router because it is running ad additional routing protocol.
D. A copy of the local routing table.

Answer: D

Explanation:
In a single-area link-state routing protocol (such as OSPF), routers share specific information about the network topology, not their entire routing table. They exchange link-state advertisements (LSAs) that contain information about their directly connected interfaces and their state, allowing other routers to build a consistent view of the network.

NEW QUESTION # 27
......

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