Nokia 4A0-112 Practice Exams
Last updated on Oct 22,2026- Exam Code: 4A0-112
- Exam Name: Nokia IS-IS Routing Protocol
- Certification Provider: Nokia
- Latest update: Oct 22,2026
Which of the following is a valid alternative representation of the IPv6 address 2001:0da8:0000:0000:0024:0000:4ab9:0300?
- A . 2001:0da8::0024:0000:4ab9:03
- B . 2001:da8::0:24::4ab9:300
- C . 2001:da8::24::4ab9:300
- D . 2001:da8::24:0:4ab9:300
Two IS-IS neighboring routers are trying to establish an adjacency, but the interface has been configured as broadcast on one of them and as point-to-point on the other.
Why is the adjacency not established?
- A . The routers do not agree on the result of the DIS election.
- B . The routers discard the received Hello messages because they are not the expected type: LAN Hello vs point-to-point Hello.
- C . The routers do not receive each other’s Hello messages because they listen for messages transmitted to different multicast MAC addresses.
- D . The routers do not receive each other’s Hello messages because they listen for messages transmitted to different multicast IP addresses.
Which of the following definitions best describes route redistribution?
- A . It is the process of deciding at line-rate speed which packets will be dropped and which ones will be forwarded.
- B . It is the process of redirecting packets to be processed by an intermediate network function before allowing them to be forwarded to their intended final destination.
- C . It is the process of passing routing information from one routing domain to another, which usually means from one routing protocol to another.
- D . It is the process of controlling which route advertisements received from routing peers are accepted and/or deciding which locally known prefixes are advertised to routing peers.
Refer to the exhibit.
Routers R1 through R4 are running an IGP in such a way that they have each other’s system IP addresses in their routing tables. A static route is configured on router R1 so that it can reach subnetwork 10.4.100.0/24. The network administrator decides to use an indirect static route, as shown in the diagram. However, pinging the server from router R1 fails.
What may be the problem in this case?
- A . Router R1 drops the echo request because address 10.10.10.3 does not belong to an adjacent router.
- B . Router R2 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.
- C . Router R3 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.
- D . The echo request arrives at the server but there is no path for the echo response to return to router R1.
When a router performs the SPF calculation, which router is used as the root of the shortest path tree?
- A . The router with the fewest links.
- B . The router with the lowest router ID.
- C . The router’s closest neighbor.
- D . The router doing the calculation.
Which of the following statements about router interfaces on a Nokia 7750 SR is FALSE?
- A . They can be used in pairs on the same subnet for redundancy.
- B . They can be assigned IPv4 and/or IPv6 addresses.
- C . They can be logical or physical.
- D . The system interface exists by default.
Refer to the exhibit.
Routers R1, R2, R3, and R4 are running IS-IS.
Assuming all interfaces are added to IS-IS as point-to-point and no commands are issued at the interface level to restrict adjacencies, which of the following statements is TRUE?
- A . Routers R1 and R2 are L2 routers. Routers R3 and R4 are L1 routers.
- B . Routers R1 and R2 are L2 routers. Routers R3 and R4 are L1/L2 routers.
- C . Routers R1 and R2 are L1/L2 routers. Routers R3 and R4 are L1 routers.
- D . All four routers are L1/L2.
When multiple routing protocols offer a route for the same prefix, what part of the router is in charge of deciding which route to make active?
- A . The routing information base (RIB)
- B . The routing table manager (RTM)
- C . The equal cost multipath configuration
- D . The forwarding information base (FIB)