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To take the Nokia 4A0-112 certification exam, candidates must have a good understanding of networking fundamentals and must have experience with Nokia's networking equipment and software. 4A0-112 exam consists of multiple-choice questions and simulations that test the candidate's ability to design and configure IS-IS networks, troubleshoot network issues, and optimize network performance. Earning the Nokia 4A0-112 Certification demonstrates to potential employers and colleagues that the individual has a deep understanding of IS-IS routing and is capable of working with Nokia's equipment and software to design and maintain complex networks.

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Nokia IS-IS Routing Protocol Sample Questions (Q36-Q41):

NEW QUESTION # 36
Which of the following statements regarding the databases used by a link-state routing protocol in a single-are routing domain is FALSE?

A. The adjacency database contains information about all the links interconnecting the domain's routers.
B. The link-state database is the same for all routers.
C. The forwarding database contains the optimum next hop for each known prefix.
D. The link-state database has the local topology and IP reachability information advertised by all the routers.

Answer: A

Explanation:
The adjacency database contains information about the state of the router's adjacencies (i.e., the routers that it is directly connected to and has established a neighbor relationship with). It does not store information about all links in the domain; that information is stored in the link-state database.

NEW QUESTION # 37
Refer to the exhibit.

Routers R1 through R4 are running an IGP in such a way that they have each other's system IP addresses in their routing tables. A static route is configured on router R1 so that it can reach subnetwork 10.4.100.0/24. The network administrator decides to use an indirect static route, as shown in the diagram. However, pinging the server from router R1 fails. What may be the problem in this case?

A. Router R3 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.
B. Router R1 drops the echo request because address 10.10.10.3 does not belong to an adjacent router.
C. Router R2 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.
D. The echo request arrives at the server but there is no path for the echo response to return to router R1.

Answer: D

Explanation:
The static route configured on router R1 uses an indirect next-hop, which is 10.10.10.3 (R3). While the echo request from R1 reaches the server through the IGP, the problem lies in the return path for the echo response.
The route 10.4.100.0/24 is reachable through R3, but there is no reciprocal route in R3's routing table that allows the response to flow back towards R1. This results in a failure to return the echo response to R1, causing the ping to fail.

NEW QUESTION # 38
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 destination IP address.
B. It uses the routing table to find a match for the source IP address.
C. It uses the ARP table to find a match for the destination MAC address.
D. It uses the ARP table to find a match for the source MAC address.

Answer: A

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 # 39
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:da8::24::4ab9:300
C. 2001:da8::0:24::4ab9:300
D. 2001:0da8::0024:0000:4ab9:03

Answer: D

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 # 40
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 # 41
......

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