100% PASS RATE NOKIA CERTIFICATION 4A0-112 TRAINING - 4A0-112 FREE DOWNLOAD

100% Pass Rate Nokia Certification 4A0-112 Training - 4A0-112 Free Download

100% Pass Rate Nokia Certification 4A0-112 Training - 4A0-112 Free Download

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Tags: Certification 4A0-112 Training, Exam 4A0-112 Questions Pdf, Regualer 4A0-112 Update, Latest 4A0-112 Exam Duration, 4A0-112 Valid Exam Syllabus

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Nokia IS-IS routing protocol is one of the most popular and widely used routing protocols in the world. It is a link-state routing protocol that operates at the OSI layer 2 and layer 3. The protocol is used to exchange information between routers and determine the best path for data packets to reach their destination. The Nokia 4A0-112 Exam covers all aspects of the IS-IS protocol, including its architecture, configuration, operation, and troubleshooting.

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Nokia IS-IS Routing Protocol Sample Questions (Q21-Q26):

NEW QUESTION # 21
Refer to the exhibit.

All routers in the diagram are running a link-state routing protocol. Before the link failure, all routers have operational adjacencies with each other and there is a BFD session between routers R1 and R3. After the link failure, which of the following affects the routing protocol's convergence time?

  • A. The time taken by the switches to detect that the physical ports are down.
  • B. The value of the Ethernet hello timers on the switches.
  • C. The value of the BFD transmit interval, receive interval and multiplier settings on routers R1 and R3.
  • D. The value of the routing protocol hello timers on routers R1 and R3.

Answer: C

Explanation:
BFD (Bidirectional Forwarding Detection) is used to detect link failures quickly and helps improve convergence time in link-state routing protocols. The BFD session between routers R1 and R3 allows them to detect the failure of the link between them more quickly than the regular routing protocol hello timers. The transmit interval, receive interval, and multiplier settings determine how fast BFD detects a failure and triggers the routing protocol to converge, which directly impacts the convergence time.


NEW QUESTION # 22
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 R1
  • B. Routers R2 and R4
  • C. Routers R1 and R2
  • D. Router R2

Answer: D

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 # 23
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 and the branch office both have default routes.
  • B. The head office has a specific static route and the branch office has a default route.
  • C. The head office has a default route and the branch office has a specific static route.
  • D. The head office and the branch offices both have specific static routes.

Answer: C

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 # 24
Refer to the exhibit.

All routers in the diagram are running an interior gateway protocol (IGP) and have been configured with an ECMP value of 4. Router R5 advertises the prefix 192.168.3.0/24 using the IGP. Assuming all links have the same cost, how many entries for prefix 192.168.3.0/24 will be in router R3's routing table?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: D

Explanation:
In this scenario, the routers are configured with an Equal-Cost Multi-Path (ECMP) value of 4, meaning they can utilize up to 4 equal-cost paths to reach a destination. Since Router R5 is advertising the 192.168.3.0/24 prefix and all links have the same cost, router R3 will receive multiple routes to reach this destination.
Given that all the routers (R1, R2, R3, R4, and R5) are connected in a way that can support multiple equal-cost paths, and assuming ECMP is set to 4, the routing table on Router R3 will have up to 4 entries for the prefix 192.168.3.0/24.
Thus, Router R3's routing table will contain 4 entries for the prefix 192.168.3.0/24.


NEW QUESTION # 25
What do the address resolution protocol (ARP) for IPv4 and the neighbor discovery procedures for IPv6 have in common?

  • A. Both detect duplicate MAC address assignments.
  • B. Both detect duplicate IP address assignments.
  • C. Both resolve a host device's MAC address using its IP address.
  • D. Both resolve a host device's IP address using its MAC address.

Answer: C

Explanation:
ARP for IPv4 and Neighbor Discovery Protocol (NDP) for IPv6 are both used to map a device's IP address to its MAC address. This is essential for communication within a local network.
ARP is used in IPv4 networks, and NDP performs a similar function in IPv6 networks, ensuring devices can communicate effectively on the same network segment.


NEW QUESTION # 26
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