REAL 4A0-112 DUMPS FREE | 4A0-112 EXAM DUMPS DEMO

Real 4A0-112 Dumps Free | 4A0-112 Exam Dumps Demo

Real 4A0-112 Dumps Free | 4A0-112 Exam Dumps Demo

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Tags: Real 4A0-112 Dumps Free, 4A0-112 Exam Dumps Demo, Valid 4A0-112 Exam Pattern, 4A0-112 Formal Test, Study 4A0-112 Demo

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Achieving the Nokia 4A0-112 Certification demonstrates that the candidate has the skills and knowledge required to design, deploy, and manage large-scale service provider networks using the Nokia IS-IS routing protocol. Nokia IS-IS Routing Protocol certification is recognized globally as a mark of excellence in the networking industry and is highly valued by employers. With this certification, network professionals can enhance their career prospects and open up new opportunities for advancement in their field.

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Nokia IS-IS Routing Protocol Sample Questions (Q33-Q38):

NEW QUESTION # 33
When using IS-IS in native mode for routing in a dual-stack IPv4/IPv6 environment, which of the following statements is FALSE?

  • A. In a multi-area environment, the SPF algorithm needs to be run four times on each L1/L2 router.
  • B. It may lead to traffic black-holing if not properly designed.
  • C. All links are assumed to be IPv4- and IPv6-capable.
  • D. The same topology information is used to calculate the shortest path tree for both IPv4 and IPv6.

Answer: A

Explanation:
In a dual-stack IPv4/IPv6 IS-IS environment, the SPF (Shortest Path First) algorithm is only run once per router for each protocol (IPv4 or IPv6). The topology is shared, but the SPF calculations for IPv4 and IPv6 are separate. This means that the SPF algorithm will run twice (once for IPv4 and once for IPv6) for each L1/L2 router, not four times.


NEW QUESTION # 34
A router is trying to establish an IS-IS adjacency with the DIS on a broadcast link. What event causes the adjacency to change from "Initializing" to "UP"?

  • A. Receiving the last LSP requested from the DIS.
  • B. Receiving a CSNP packet from the DIS acknowledging the last transmitted LSP.
  • C. Receiving the first CSNP packet from the DIS that lists the LSPs in the DIS's link-state database.
  • D. Receiving a Hello packet from the DIS that contains the local router's own MAC address in the neighbor list.

Answer: C

Explanation:
The process of establishing an IS-IS adjacency on a broadcast link involves several steps, and the transition from the Initializing state to the UP state occurs when both routers exchange sufficient information to confirm they have a consistent view of the link-state database.
The CSNP (Complete Sequence Number PDU) packet is used to advertise the list of LSPs in the router's link-state database. When a router receives the first CSNP from the DIS (Designated Intermediate System) that lists the LSPs in the DIS's database, it indicates that the router has enough information to establish the adjacency and synchronize its database.


NEW QUESTION # 35
Which of the following is NOT a required configuration step to successfully run IS-IS on a router?

  • A. The router needs to be associated with an IS-IS area ID.
  • B. The IS-IS context needs to be enabled.
  • C. A reference bandwidth needs to be configured to calculate link costs.
  • D. Layer-3 interfaces that will participate in IS-IS need to be identified.

Answer: C

Explanation:
While configuring a reference bandwidth (which is used to calculate link costs) can be useful, it is not strictly required for IS-IS to run. IS-IS uses default bandwidth values to calculate costs, and it can function without explicitly configuring a reference bandwidth.


NEW QUESTION # 36
Consider the exhibit.

All routers are running IS-IS with IPv6 support enabled. Based on the topology shown, and the route tables of routers R3 and R4, which of the following statements is TRUE?

  • A. Route leaking is configured on router R2 but not on router R1.
  • B. There is no route leaking configured on router R1 or router R2.
  • C. Route leaking is configured on both routers R1 and R2.
  • D. Route leaking is configured on router R1 but not on router R2.

Answer: C

Explanation:
Based on the IPv6 route table output for R3 and R4, we can see that the routers have remote routes listed as "Remote ISIS", indicating that the route is being advertised from a different area (area 49.01 or 49.02). This is a sign of route leaking, where routes from one area are being shared across areas.
The routes from R3 (level-1 router) are being advertised to R4 (level-1 router), and vice versa, with ISIS as the protocol. This implies that there is route leaking configured to allow information to pass between areas.


NEW QUESTION # 37
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 PSNP to its neighbor to request a copy of the LSP.
  • B. The router sends a copy of the referenced LSP from its database to its neighbor.
  • C. The router sends a CSNP to its neighbor describing the newer LSPs in its database.
  • D. The router updates its database with the new sequence number and floods a copy of the LSP to its other neighbors.

Answer: B

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 # 38
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