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Nokia 4A0-112 exam is a certification exam that focuses on the Nokia IS-IS routing protocol. 4A0-112 exam is designed for network engineers and professionals who are interested in learning more about the Nokia IS-IS routing protocol and want to validate their proficiency in operating and configuring the protocol. 4A0-112 Exam is designed to test the candidate's knowledge and skills in various areas of the Nokia IS-IS routing protocol, including network design, implementation, and troubleshooting.

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Nokia 4A0-112 Exam is a computer-based test that consists of multiple-choice questions. You will have a set amount of time to complete the exam, so it is important to manage your time effectively and pace yourself throughout the test. You will receive your results immediately after completing the exam, and if you pass, you will earn the Nokia IS-IS Routing Protocol certification.

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

NEW QUESTION # 37
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 sends a PSNP to its neighbor to request a copy of the LSP.
B. The router sends a CSNP to its neighbor describing the newer LSPs in its database.
C. The router updates its database with the new sequence number and floods a copy of the LSP to its other neighbors.
D. The router sends a copy of the referenced LSP from its database to its neighbor.

Answer: D

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 # 38
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 # 39
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. Calculating the shortest-path next hop for each known IP prefix.
C. Installing two entries in the FIB for IP prefixes, one active and one in standby mode.
D. Enabling the router to locally repair the active path to an IP prefix in case of failure.

Answer: B

NEW QUESTION # 40
Which of the following statements about the IP forwarding process on a router is TRUE?

A. It uses the routing table to find a match for the source IP address.
B. It uses the ARP table to find a match for the source MAC address.
C. It uses the ARP table to find a match for the destination MAC address.
D. It uses the routing table to find a match for the destination IP address.

Answer: D

Explanation:
During the IP forwarding process, routers use the routing table to determine the next hop based on the destination IP address. The source IP address is not directly involved in the lookup process for forwarding.
The ARP table is used to map IP addresses to MAC addresses, specifically for resolving the MAC address of the next hop (destination MAC address) for forwarding packets within the local network.

NEW QUESTION # 41
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 # 42
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