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100% Pass Quiz 4A0-112 - Nokia IS-IS Routing Protocol Useful Accurate Prep Material

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Nokia 4A0-112 certification exam is an essential certification for network professionals who work in service provider environments. 4A0-112 exam covers a wide range of topics, including IS-IS protocol fundamentals, IS-IS protocol operation, and IS-IS protocol security. 4A0-112 exam also covers advanced topics such as IS-IS design and implementation, troubleshooting, and optimization.

Nokia 4A0-112 is a certification exam that evaluates the candidate's knowledge and expertise in Nokia's IS-IS routing protocol. 4A0-112 exam is designed to test the candidate's proficiency in implementing and configuring IS-IS protocol in Nokia's Service Routing Architect (SRA) platform. It is an intermediate-level exam that requires a strong foundation in networking concepts and routing protocols.

Nokia 4A0-112 Exam is a valuable certification for network professionals who wish to demonstrate their expertise in the intermediate-level routing protocols used in large-scale networks. It is an essential certification for those who work in service provider networks, data centers, and enterprise networks. Candidates who pass the exam are recognized as experts in the field and are highly sought after by employers looking for skilled professionals to manage their network infrastructures.

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Nokia IS-IS Routing Protocol Sample Questions (Q27-Q32):

NEW QUESTION # 27
An IS-IS router receives a CSNP that references an older LSP than the one in its local database. What action is taken?

A. The router updates its database with the new sequence number and floods a copy of the LSP to its other neighbors.
B. The router sends a PSNP to its neighbor to request a copy of the LSP.
C. The router sends a copy of the referenced LSP from its database to its neighbor.
D. The router sends a CSNP to its neighbor describing the newer LSPs in its database.

Answer: C

Explanation:
When a router receives a CSNP (Complete Sequence Number PDU) that references an older LSP (Link-State PDU) than the one in its local database, it indicates that the neighbor is missing newer information.
In response, the router sends back a PSNP (Partial Sequence Number PDU) to the neighbor, which includes a copy of the LSPs it has in its local database that the neighbor may not yet have. This helps to synchronize the link-state information between routers.

NEW QUESTION # 28
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: D

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 # 29
There are several differences between IS-IS Hello packets used on broadcast interfaces and on point-to-point interfaces.
Which of the following statements is FALSE?

A. Broadcast Hello messages identify the elected designed IS (DIS) and point-to-point Hello messages do not.
B. The multicast MAC addresses to which the Hello messages are sent are different on broadcast interfaces and on point-to-point interfaces.
C. The neighbors are identified using their interface MAC addresses on broadcast Hello messages and using their system IDs on point-to-point Hello messages.
D. On broadcast interfaces there are different Hello packet types for level-1 and level-2 adjacencies, whereas on point-to-point interfaces there is a single Hello packet type.

Answer: C

Explanation:
In both broadcast and point-to-point interfaces, IS-IS routers identify neighbors using system IDs, not interface MAC addresses. The system ID is a unique identifier assigned to each router, and it is used to identify neighbors in both types of interfaces.

NEW QUESTION # 30
A router is trying to establish an IS-IS adjacency with the DIS on a broadcast link. What event causes the adjacency to change from "Initializing" to "UP"?

A. Receiving a Hello packet from the DIS that contains the local router's own MAC address in the neighbor list.
B. Receiving a CSNP packet from the DIS acknowledging the last transmitted LSP.
C. Receiving the first CSNP packet from the DIS that lists the LSPs in the DIS's link-state database.
D. Receiving the last LSP requested from the DIS.

Answer: C

Explanation:
The process of establishing an IS-IS adjacency on a broadcast link involves several steps, and the transition from the Initializing state to the UP state occurs when both routers exchange sufficient information to confirm they have a consistent view of the link-state database.
The CSNP (Complete Sequence Number PDU) packet is used to advertise the list of LSPs in the router's link-state database. When a router receives the first CSNP from the DIS (Designated Intermediate System) that lists the LSPs in the DIS's database, it indicates that the router has enough information to establish the adjacency and synchronize its database.

NEW QUESTION # 31
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. 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.
B. Enabling the router to locally repair the active path to an IP prefix in case of failure.
C. Installing two entries in the FIB for IP prefixes, one active and one in standby mode.
D. Calculating the shortest-path next hop for each known IP prefix.

Answer: D

NEW QUESTION # 32
......

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