Quiz 4A0-112 - Trustable Nokia IS-IS Routing Protocol Braindumps Torrent

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Nokia 4A0-112 exam is a comprehensive test that covers a variety of topics related to the Nokia IS-IS Routing Protocol. 4A0-112 exam covers areas such as protocol operation, configuration, troubleshooting, and optimization. Candidates are expected to have a deep understanding of the protocol, including its features, functionality, and implementation. Successful candidates are expected to be able to design, implement, and manage IS-IS networks in complex environments.

Nokia 4A0-112 Exam covers topics such as the configuration and operation of Nokia IS-IS Routing Protocol, IS-IS link-state database concepts, route selection criteria, and IS-IS-related troubleshooting procedures. It also covers the different types of IS-IS messages that are exchanged between routers and how they are used to build and maintain the routing table.

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Nokia IS-IS Routing Protocol Sample Questions (Q37-Q42):

NEW QUESTION # 37
Refer to the exhibit.

Routers R1, R2, R3, and R4 are running IS-IS. Assuming all interfaces are added to IS-IS as point-to-point and no commands are issued at the interface level to restrict adjacencies, which of the following statements is TRUE?

A. Routers R1 and R2 are L2 routers. Routers R3 and R4 are L1/L2 routers.
B. Routers R1 and R2 are L1/L2 routers. Routers R3 and R4 are L1 routers.
C. Routers R1 and R2 are L2 routers. Routers R3 and R4 are L1 routers.
D. All four routers are L1/L2.

Answer: B

Explanation:
From the output, we can see that the usage column indicates whether a router is operating as an L1 or L2 router:
The L1/L2 designations refer to whether the routers participate in both Level 1 and Level 2 of IS-IS:
In this case, R1 and R2 are L2 routers, and R3 and R4 are L1 routers.

NEW QUESTION # 38
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 local router ID and the router IDs of neighboring routers.
B. IP prefixes known by the router because it is running ad additional routing protocol.
C. The IP prefixes of subnets directly attached to the router.
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 # 39
Which of the following statements about router interfaces on a Nokia 7750 SR is FALSE?

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

Answer: D

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 are running an IGP in such a way that they have each other's system IP addresses in their routing tables. A static route is configured on router R1 so that it can reach subnetwork 10.4.100.0/24. The network administrator decides to use an indirect static route, as shown in the diagram. However, pinging the server from router R1 fails. What may be the problem in this case?

A. Router R3 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.
B. The echo request arrives at the server but there is no path for the echo response to return to router R1.
C. Router R1 drops the echo request because address 10.10.10.3 does not belong to an adjacent router.
D. Router R2 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.

Answer: B

Explanation:
The static route configured on router R1 uses an indirect next-hop, which is 10.10.10.3 (R3). While the echo request from R1 reaches the server through the IGP, the problem lies in the return path for the echo response.
The route 10.4.100.0/24 is reachable through R3, but there is no reciprocal route in R3's routing table that allows the response to flow back towards R1. This results in a failure to return the echo response to R1, causing the ping to fail.

NEW QUESTION # 41
Two IS-IS neighboring routers are trying to establish an adjacency, but the interface has been configured as broadcast on one of them and as point-to-point on the other. Why is the adjacency not established?

A. The routers do not agree on the result of the DIS election.
B. The routers do not receive each other's Hello messages because they listen for messages transmitted to different multicast MAC addresses.
C. The routers discard the received Hello messages because they are not the expected type: LAN Hello vs point-to-point Hello.
D. The routers do not receive each other's Hello messages because they listen for messages transmitted to different multicast IP addresses.

Answer: C

Explanation:
IS-IS routers use different types of Hello messages depending on whether the interface is configured as a broadcast (LAN) or point-to-point (P2P) link.
On a broadcast network (e.g., Ethernet), IS-IS routers use LAN Hello packets to establish adjacencies.
On a point-to-point link, IS-IS uses point-to-point Hello packets.
If one router is configured for a broadcast interface and the other for point-to-point, they will exchange incompatible Hello packets, and as a result, neither router will accept the other's Hello messages, preventing the adjacency from being established.

NEW QUESTION # 42
......

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