NOKIA 4A0-112 PREP & TEST BUNDLE, 4A0-112 EXAM CRAM PDF,

Nokia 4A0-112 Prep & test bundle, 4A0-112 Exam Cram pdf,

Nokia 4A0-112 Prep & test bundle, 4A0-112 Exam Cram pdf,

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Nokia IS-IS Routing Protocol Sample Questions (Q12-Q17):

NEW QUESTION # 12
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. There is no route leaking configured on router R1 or router R2.
  • B. Route leaking is configured on both routers R1 and R2.
  • C. Route leaking is configured on router R1 but not on router R2.
  • D. Route leaking is configured on router R2 but not on router R1.

Answer: B

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 # 13
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 a CSNP packet from the DIS acknowledging the last transmitted LSP.
  • B. Receiving the first CSNP packet from the DIS that lists the LSPs in the DIS's link-state database.
  • C. Receiving the last LSP requested from the DIS.
  • D. Receiving a Hello packet from the DIS that contains the local router's own MAC address in the neighbor list.

Answer: B

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 # 14
A routing domain uses a link-state routing protocol. Which of the following would NOT be an advantage of dividing the entire routing domain into areas?

  • A. Fewer routers are required to handle the same amount of traffic, as compared to a single-area domain.
  • B. Route tables can be reduced by summarizing the IP prefixes advertised between areas.
  • C. Detailed topology information is only shared among routers within the same area, thus reducing the complexity of the SPF calculation.
  • D. Less-capable routers can be isolated from having to keep track of IP prefixes that are external to the local routing domain.

Answer: A

Explanation:
Dividing a domain into areas typically does not reduce the number of routers needed to handle traffic. It is more focused on improving scalability, reducing the size of routing tables, and limiting the scope of SPF calculations, but it doesn't inherently reduce the number of routers required.


NEW QUESTION # 15
A routing domain is using a single-area link-state routing protocol. Which of the following is NOT information that a router can share with other routers in the domain using protocol-specific messages?

  • A. The IP prefixes of subnets directly attached to the router.
  • B. IP prefixes known by the router because it is running ad additional routing protocol.
  • C. A copy of the local routing table.
  • D. The local router ID and the router IDs of neighboring routers.

Answer: C

Explanation:
In a single-area link-state routing protocol (such as OSPF), routers share specific information about the network topology, not their entire routing table. They exchange link-state advertisements (LSAs) that contain information about their directly connected interfaces and their state, allowing other routers to build a consistent view of the network.


NEW QUESTION # 16
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: C

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 # 17
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