4A0-112 practice test questions, answers, explanations

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With our wide range of Nokia 4A0-112 exam questions types and difficulty levels, you can tailor your Nokia 4A0-112 exam practice to your needs. Your performance and exam skills will be improved with our Nokia 4A0-112 Practice Test software. The software provides you with a range of Nokia 4A0-112 exam dumps, all of which are based on past Nokia 4A0-112 certifications.

In order to take the Nokia 4A0-112 certification exam, you'll need to have a solid foundation in networking concepts and familiarize yourself with Nokia's routing portfolio. 4A0-112 exam covers a wide range of topics, including IS-IS theory, protocol operation, configuration, and troubleshooting. Additionally, you'll need to have experience working with Nokia routers and switches, as many of the exam questions are situation-based.

Nokia 4A0-112 Certification Exam covers a wide range of topics related to the IS-IS routing protocol, including protocol fundamentals, implementation and configuration, routing policy, network design, and troubleshooting. 4A0-112 exam consists of 60 multiple-choice questions that must be completed within 90 minutes. To pass the exam, candidates must achieve a minimum score of 80%.

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Nokia IS-IS Routing Protocol Sample Questions (Q23-Q28):

NEW QUESTION # 23
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 router with the highest interface MAC address.
B. The router with the highest system ID.
C. The existing DIS remains the DIS.
D. The Hello packet with the highest sequence number.

Answer: B

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 # 24
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. IP prefixes known by the router because it is running ad additional routing protocol.
B. A copy of the local routing table.
C. The IP prefixes of subnets directly attached to the router.
D. The local router ID and the router IDs of neighboring routers.

Answer: B

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 # 25
For a link-state routing protocol, which of the following statements about link-state updates is FALSE?

A. When a link-state update reaches its maximum age on a router, the router will flood that update to its neighbors.
B. Aging helps ensure that routers that are no longer part of the topology will eventually get removed from the link-state database.
C. The age value is updated as the link-state update is flooded throughout the network and when it is in the link-state database
D. When a router detects that a link-state update has reached its maximum age, it will request a new update from the source router.

Answer: A

Explanation:
When a link-state update reaches its maximum age, it is removed from the router's link-state database, not flooded to its neighbors. This prevents outdated information from continuing to affect the routing decisions. The router does not flood the aged update; instead, it will typically request a new link-state advertisement from the original source router if the information is still needed.

NEW QUESTION # 26
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. The neighbors are identified using their interface MAC addresses on broadcast Hello messages and using their system IDs on point-to-point Hello messages.
B. 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.
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: A

NEW QUESTION # 27
Which of the following is a valid alternative representation of the IPv6 address
2001:0da8:0000:0000:0024:0000:4ab9:0300?

A. 2001:da8::24:0:4ab9:300
B. 2001:0da8::0024:0000:4ab9:03
C. 2001:da8::24::4ab9:300
D. 2001:da8::0:24::4ab9:300

Answer: B

Explanation:
In IPv6, consecutive sections of zeros can be abbreviated with a double colon (::) once in an address. Also, leading zeros in each hextet (group of four hexadecimal digits) can be removed.
The original address is 2001:0da8:0000:0000:0024:0000:4ab9:0300.
Removing leading zeros and applying the abbreviation:

NEW QUESTION # 28
......

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4A0-112 practice test questions, answers, explanations

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Nokia IS-IS Routing Protocol Sample Questions (Q23-Q28):

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