[Sep 26, 2025] 4A0-112 Dumps Full Questions – Exam Study Guide [Q24-Q46]

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[Sep 26, 2025] 4A0-112 Dumps Full Questions – Exam Study Guide

Nokia Network Routing Specialist II Free Certification Exam Material from ValidExam with 42 Questions

QUESTION 24
An IS-IS router receives a CSNP that references an older LSP than the one in its local database. What action is taken?

The router sends a copy of the referenced LSP from its database to its neighbor.

The router sends a CSNP to its neighbor describing the newer LSPs in its database.

The router updates its database with the new sequence number and floods a copy of the LSP to its other neighbors.

The router sends a PSNP to its neighbor to request a copy of the LSP.

QUESTION 25
Which of the following is a valid alternative representation of the IPv6 address
2001:0da8:0000:0000:0024:0000:4ab9:0300?

2001:0da8::0024:0000:4ab9:03

2001:da8::0:24::4ab9:300

2001:da8::24::4ab9:300

2001:da8::24:0:4ab9:300

QUESTION 26
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?

Router R4 will have a route to router R6’s system IP address with router R2 as the next-hop.

Router R4 will have a default route with router R2 as the next-hop.

Router R4 will have a default route with router R3 as the next-hop.

Router R4 will not have a matching entry in its routing table for router R6’s system IP address.

QUESTION 27
Refer to the exhibit.

Routers R1 through R4 in the diagram have established IS-IS adjacencies. Router R1 is L1/L2 and is the DIS of its two broadcast interfaces. How many LSPs will it generate?

QUESTION 28
Which of the following statements regarding the databases used by a link-state routing protocol in a single-are routing domain is FALSE?

The link-state database has the local topology and IP reachability information advertised by all the routers.

The adjacency database contains information about all the links interconnecting the domain’s routers.

The forwarding database contains the optimum next hop for each known prefix.

The link-state database is the same for all routers.

QUESTION 29
What is the replacement for ARP in IPv6?

Duplicate address detection procedures.

Router discovery procedures.

Neighbor discovery procedures.

Stateless address auto-configuration procedures.

QUESTION 30
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”?

Receiving a Hello packet from the DIS that contains the local router’s own MAC address in the neighbor list.

Receiving the first CSNP packet from the DIS that lists the LSPs in the DIS’s link-state database.

Receiving a CSNP packet from the DIS acknowledging the last transmitted LSP.

Receiving the last LSP requested from the DIS.

QUESTION 31
For a link-state routing protocol, which of the following statements about link-state updates is FALSE?

When a link-state update reaches its maximum age on a router, the router will flood that update to its neighbors.

When a router detects that a link-state update has reached its maximum age, it will request a new update from the source router.

Aging helps ensure that routers that are no longer part of the topology will eventually get removed from the link-state database.

The age value is updated as the link-state update is flooded throughout the network and when it is in the link-state database

QUESTION 32
Refer to the exhibit.

A static route has been configured on router R1 to reach the PC at 139.120.121.2.
What might be causing the ping to fail?

Router R2 needs a static route to the PC.

Router R1 needs a static route to router R2.

The configured next hop does not belong to a subnet adjacent to R1.

The configured static route needs to be a default route.

QUESTION 33
Refer to the exhibit.

Static routing is to be used in a network between a corporate head office and a branch office. The head office has many connected subnetworks, whereas the branch office has one subnetwork and a single connection to the head office. Which of the following is the most likely configuration on the head office and branch office routers?

The head office has a default route and the branch office has a specific static route.

The head office and the branch offices both have specific static routes.

The head office and the branch office both have default routes.

The head office has a specific static route and the branch office has a default route.

QUESTION 34
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?

There is no route leaking configured on router R1 or router R2.

Route leaking is configured on router R1 but not on router R2.

Route leaking is configured on router R2 but not on router R1.

Route leaking is configured on both routers R1 and R2.

QUESTION 35
Refer to the exhibit.

In the IS-IS network shown, router R1 has been configured to summarize subnetworks 20.20.1.0/24 and 20.20.2.0/24 as 20.20.0.0/16. Which routers’ routing tables will be reduced, compared to their routing tables before the summarization?

Router R1

Router R2

Routers R1 and R2

Routers R2 and R4

QUESTION 36
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?

Control Processing Module (CMP)

Media Dependent Adapter (MDA)

Switch Fabric (SF)

Input/Output Module (IOM)

QUESTION 37
On a broadcast interface, an IS-IS router receives an LSP that is newer than the one on its database. Which of the following statements best describes the actions taken by the router as a consequence?

The router sends back a copy of the LSP from its database to its neighbor.

The router updates its database with the LSP and floods a copy to its neighbors on other interfaces.

The router updated its database with the LSP, acknowledges the LSP with a PSNP, and floods a copy to its neighbors on other interfaces.

The router updates its database with the LSP and acknowledges it with a PSNP.

QUESTION 38
Which of the following is NOT a function of the control plane a router?

To exchange signaling messages with other routers.

To determine the best way to forward packets.

To establish routing paths to deliver packets from source to destination and to reestablish them in case of failure.

To utilize the forwarding tables to forward data packets towards their destination.

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?

The router with the highest system ID.

The Hello packet with the highest sequence number.

The existing DIS remains the DIS.

The router with the highest interface MAC address.

QUESTION 40
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?