TEST NOKIA 4A0-112 ENGINE | DUMPS 4A0-112 REVIEWS

Test Nokia 4A0-112 Engine | Dumps 4A0-112 Reviews

Test Nokia 4A0-112 Engine | Dumps 4A0-112 Reviews

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Tags: Test 4A0-112 Engine, Dumps 4A0-112 Reviews, Free 4A0-112 Brain Dumps, Real 4A0-112 Torrent, 4A0-112 Guaranteed Questions Answers

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Nokia 4A0-112 Certification Exam is an advanced-level exam that requires candidates to have a solid understanding of the concepts and principles of the Nokia IS-IS routing protocol. Candidates are expected to have experience in designing, configuring, and maintaining IS-IS networks. 4A0-112 exam covers a wide range of topics, including IS-IS architecture, routing policies, traffic engineering, and network scalability.

The IS-IS protocol is used to route data packets between networks in a highly efficient and scalable manner. By becoming certified in IS-IS, you'll have a deep understanding of the protocol's operation, including its key features and benefits. You'll also learn how to configure and troubleshoot IS-IS routers, ensuring that your network is up and running smoothly at all times.

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Nokia IS-IS Routing Protocol Sample Questions (Q38-Q43):

NEW QUESTION # 38
Refer to the exhibit.

In the diagram, all routers are using IS-IS as their routing protocol. The number next to each link is its metric value.
What path will traffic follow from router R6 to router R3, and from router R3 to router R6?

  • A. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R2-R5-R6).
  • B. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R2-R5-R6).
  • C. Router R6 to router R3 will follow (R6-R5-R7-R4-R3). Router R3 to router R6 will follow (R3-R4-R7-R5-R6).
  • D. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R7-R5-R6).

Answer: B

Explanation:
The metric values between the routers dictate the routing paths, and IS-IS will calculate the shortest path based on these values.
R6 to R3: The path from R6 to R3 will go through R5 and R2, as this route has the least cumulative metric (10 + 10 + 15 = 35).
R3 to R6: The reverse path from R3 to R6 will follow R3 → R2 → R5 → R6 because this route is also the shortest with a total metric of 10 + 10 + 10 = 30.


NEW QUESTION # 39
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 existing DIS remains the DIS.
  • C. The Hello packet with the highest sequence number.
  • D. The router with the highest system ID.

Answer: D

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 # 40
Which component of the Nokia 7750 SR is in charge of performing the longest prefix match lookup on packets that arrive on the physical interfaces?

  • A. Input/Output Module (IOM)
  • B. Media Dependent Adapter (MDA)
  • C. Switch Fabric (SF)
  • D. Control Processing Module (CMP)

Answer: A

Explanation:
The Input/Output Module (IOM) is responsible for performing the longest prefix match (LPM) lookup on packets that arrive at the physical interfaces. The IOM performs this function by examining the destination IP address of incoming packets and using the routing table to determine the best match.


NEW QUESTION # 41
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 CSNP to its neighbor describing the newer LSPs in its database.
  • C. The router sends a PSNP to its neighbor to request a copy of the LSP.
  • D. The router updates its database with the new sequence number and floods a copy of the LSP to its other neighbors.

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 # 42
When using IS-IS in native mode for routing in a dual-stack IPv4/IPv6 environment, which of the following statements is FALSE?

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

Answer: D

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 # 43
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