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4A0-112 Hot Questions & 4A0-112 Examinations Actual Questions

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2025 Perfect 4A0-112 Hot Questions | 100% Free Nokia IS-IS Routing Protocol Examinations Actual Questions

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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.

Earning the Nokia 4A0-112 Certification can help you demonstrate your expertise in the IS-IS routing protocol and enhance your professional credibility. With this certification, you can show potential employers and clients that you have the skills and knowledge needed to design, implement, and troubleshoot IS-IS networks.

Nokia IS-IS Routing Protocol Sample Questions (Q35-Q40):

NEW QUESTION # 35
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. They can be used in pairs on the same subnet for redundancy.
C. They can be logical or physical.
D. The system interface exists by default.

Answer: B

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 # 36
A new router is added to a broadcast network. What does IS-IS use as the tiebreaker for selecting the DIS if the priorities are the same?

A. The Hello packet with the highest sequence number.
B. The router with the highest interface MAC address.
C. The existing DIS remains the DIS.
D. The router with the highest system ID.

Answer: D

Explanation:
In IS-IS, the Designated Intermediate System (DIS) is responsible for certain tasks on broadcast networks, such as generating link-state advertisements and acting as the central point for flooding information.

NEW QUESTION # 37
Refer to the exhibit.

In the IS-IS network shown, router R1 has been configured to summarize subnetworks 20.20.1.0/24 and 20.20.2.0/24 as 20.20.0.0/16. Which routers' routing tables will be reduced, compared to their routing tables before the summarization?

A. Router R2
B. Routers R2 and R4
C. Router R1
D. Routers R1 and R2

Answer: A

Explanation:
Router R1 is the one that performs the summarization of the two subnets (20.20.1.0/24 and 20.20.2.0/24) into the summarized route 20.20.0.0/16. However, R1 itself will not see any change in its routing table because it is directly connected to both subnets and already knows about them.
Router R2, which is in Area 49.0002, will benefit from this summarization because it previously had separate routes for both 20.20.1.0/24 and 20.20.2.0/24. After the summarization, R2 will only need to maintain a single route to 20.20.0.0/16, reducing the size of its routing table.
Router R4 does not directly benefit from the summarization because it is only connected to the Level 1 network and has no need for the summarized routes from R1. Thus, the summarization does not affect R4's routing table.

NEW QUESTION # 38
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. 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.
B. The neighbors are identified using their interface MAC addresses on broadcast Hello messages and using their system IDs on point-to-point Hello messages.
C. Broadcast Hello messages identify the elected designed IS (DIS) and point-to-point Hello messages do not.
D. The multicast MAC addresses to which the Hello messages are sent are different on broadcast interfaces and on point-to-point interfaces.

Answer: B

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 # 39
Refer to the exhibit.

A static route has been configured on router R1 to reach the PC at 139.120.121.2.
What might be causing the ping to fail?

A. Router R1 needs a static route to router R2.
B. The configured next hop does not belong to a subnet adjacent to R1.
C. Router R2 needs a static route to the PC.
D. The configured static route needs to be a default route.

Answer: B

Explanation:
In the configuration on router R1, the static route is defined with the next-hop IP address of 139.120.121.1.
However, the next-hop IP address 139.120.121.1 does not belong to the same subnet as the directly connected interface on R1, which is 172.31.1.1/30. For the static route to work properly, the next-hop IP address must be reachable via a directly connected interface, meaning it must be within the same subnet.
Therefore, this mismatch in subnet adjacency is likely causing the failure to reach the destination (139.120.121.2).

NEW QUESTION # 40
......

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