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Nokia 4A0-112 certification exam is a crucial step for professionals who wish to establish themselves as experts in the field of network routing. Nokia IS-IS Routing Protocol certification exam focuses on the Nokia IS-IS Routing Protocol, which is a widely-used protocol for efficient and scalable routing in large networks. Successfully passing 4A0-112 exam demonstrates a candidate's ability to design, deploy, and troubleshoot networks that use the Nokia IS-IS Routing Protocol.
Nokia 4A0-112 Certification Exam is an excellent way for IT professionals to demonstrate their expertise in the IS-IS routing protocol and Nokia's networking solutions. Nokia IS-IS Routing Protocol certification is highly respected in the industry and can open up new career opportunities for individuals who achieve it. If you are interested in pursuing this certification, be sure to invest in the necessary training and study resources to ensure your success on the exam.
Nokia IS-IS Routing Protocol Sample Questions (Q36-Q41):
NEW QUESTION # 36
Which of the following statements about IS-IS is FALSE?
- A. IS-IS uses the concept of level-1 and level-2 routers to implement hierarchy.
- B. In IS-IS, routers are associated with an area, not the interfaces.
- C. A level-1 router forwards traffic to other areas through the nearest I eve I-1/1 eve I-2 router.
- D. A router becomes level-2 when it is associated with the backbone area.
Answer: B
Explanation:
In IS-IS, routers are actually associated with interfaces rather than the entire router being associated with a single area. A router can have interfaces in multiple areas, and it is the interface's configuration that determines which area it belongs to.
NEW QUESTION # 37
Refer to the exhibit.
Examine the physical topology of the IS-IS network, the metrics of the links and the levels of the routers. All routers have their system interfaces included in IS-IS. Which of the following statements describes the route-table entry that router R4 will use to reach the system IP address of router R6?
- A. Router R4 will have a default route with router R2 as the next-hop.
- B. Router R4 will not have a matching entry in its routing table for router R6's system IP address.
- C. Router R4 will have a default route with router R3 as the next-hop.
- D. Router R4 will have a route to router R6's system IP address with router R2 as the next-hop.
Answer: D
Explanation:
Router R4 is in Area 49.0001 and R6 is in Area 49.0002. Both routers are Level 2 (L2), meaning that they can communicate across areas using Level 2 IS-IS routing.
Since R2 is the L1/L2 router that connects both Area 49.0001 and Area 49.0002, it will be the next-hop for router R4 to reach R6's system IP address.
The IS-IS protocol will ensure that R4 will have a route to R6's system IP address via R2 as the next-hop.
NEW QUESTION # 38
Which of the following statements about router interfaces on a Nokia 7750 SR is FALSE?
- A. The system interface exists by default.
- B. They can be assigned IPv4 and/or IPv6 addresses.
- C. They can be logical or physical.
- D. They can be used in pairs on the same subnet for redundancy.
Answer: D
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 # 39
Which of the following is NOT a function of the control plane a router?
- A. To exchange signaling messages with other routers.
- B. To determine the best way to forward packets.
- C. To establish routing paths to deliver packets from source to destination and to reestablish them in case of failure.
- D. To utilize the forwarding tables to forward data packets towards their destination.
Answer: D
Explanation:
The data plane (or forwarding plane) is responsible for actually forwarding the data packets. It uses the information stored in the forwarding table to determine how to move packets from one interface to another toward their destination.
NEW QUESTION # 40
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 copy of the referenced LSP from its database to its neighbor.
- B. The router sends a PSNP to its neighbor to request a copy of the LSP.
- 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 CSNP to its neighbor describing the newer LSPs in its database.
Answer: A
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 # 41
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