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Real 4A0-112 Dumps, Detailed 4A0-112 Study Plan

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Nokia 4A0-112 Exam is intended for network engineers and administrators who want to improve their knowledge and understanding of IS-IS routing protocols. 4A0-112 exam covers a broad range of topics, including IS-IS terminology, protocol operations, configuration, and troubleshooting. Candidates who pass the exam will have demonstrated their ability to implement and maintain IS-IS routing protocols in a Nokia network.

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4A0-112 Exam Questions & 4A0-112 Study Materials & 4A0-112 Dumps Torrent

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Nokia 4A0-112 exam is a certification that focuses on the Nokia IS-IS Routing Protocol, which is a protocol that is used to support the routing of IP packets across the network. It is designed to provide scalability, efficiency, and stability while forwarding packets to their destination. 4A0-112 Exam is intended for IT professionals who want to demonstrate their knowledge and skills in this protocol.

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

NEW QUESTION # 38
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?

A. If a router receives the new link-state advertisement, it acknowledges it, stores it, and forwards it to its own neighbors.
B. If a router receives multiple copies of the new link-state advertisement, it will simply ignore all copies received after the first one.
C. Every router that receives the new link-state advertisement updates its age field before forwarding it.
D. Every router that receives the new link-state advertisement runs the SPF algorithm to recalculate its shortest-path tree and its forwarding database.

Answer: C

Explanation:
When a router receives a link-state advertisement (LSA), it does not update the age field before forwarding it. The age field in an LSA is typically updated by the originating router or during the process of forwarding the LSA within the network. Routers do not modify the age field upon receiving and forwarding an LSA.

NEW QUESTION # 39
Which of the following statements about router interfaces on a Nokia 7750 SR is FALSE?

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

Answer: A

Explanation:
Typically, interfaces on a Nokia 7750 SR router are not configured in pairs on the same subnet for redundancy. Instead, redundancy is achieved through mechanisms like Virtual Router Redundancy Protocol (VRRP) or other high availability protocols, not by simply using interfaces in pairs on the same subnet.

NEW QUESTION # 40
Refer to the exhibit.

Routers R1 through R4 in the diagram have established IS-IS adjacencies. Router R1 is L1/L2 and is the DIS of its two broadcast interfaces. How many LSPs will it generate?

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

Answer: A

Explanation:
Router R1 is configured as L1/L2, meaning it is part of both Level 1 and Level 2 IS-IS routing areas. This means R1 will generate two types of LSPs:
Level 1 LSP (for the local area 49.0001) to advertise its local topology to other Level 1 routers.
Level 2 LSP (for the backbone area 49.0002) to advertise the global network topology to Level 2 routers.
R1 also has two broadcast interfaces, and as the Designated Intermediate System (DIS) on these interfaces, it will generate an LSP for each interface (one per broadcast link).
This results in three total LSPs:
A Level 1 LSP for the local area (49.0001).
A Level 2 LSP for the backbone area (49.0002).
An LSP for each of the two broadcast interfaces, which may include interface-related topology information.

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 R1 to router R7, and from router R7 to router R1?

A. Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to router R1 will follow (R7-R6-R4-R2-R1).
B. Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to router R1 will follow (R7-R6-R5-R3-R1).
C. Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to router R1 will follow (R7-R6-R5-R3-R1).
D. Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to router R1 will follow (R7-R6-R4-R2-R1).

Answer: D

Explanation:
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.

NEW QUESTION # 42
On a broadcast interface, an IS-IS router receives an LSP that is newer than the one on its database. Which of the following statements best describes the actions taken by the router as a consequence?

A. The router updates its database with the LSP and acknowledges it with a PSNP.
B. The router updated its database with the LSP, acknowledges the LSP with a PSNP, and floods a copy to its neighbors on other interfaces.
C. The router updates its database with the LSP and floods a copy to its neighbors on other interfaces.
D. The router sends back a copy of the LSP from its database to its neighbor.

Answer: B

Explanation:
When an IS-IS router receives a newer LSP (Link-State PDU) than the one already in its database, it takes the following actions:
Updates its link-state database with the new LSP.
Acknowledges the LSP with a PSNP (Partial Sequence Number PDU), which is sent to the router that originated the LSP, confirming the receipt of the newer LSP.
Floods a copy of the updated LSP to its neighbors on other interfaces to ensure all routers in the network have the updated topology information.

NEW QUESTION # 43
......

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