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4A0-101 Nokia Alcatel-Lucent Interior Routing Protocols and High Availability Free Practice Exam Questions (2025 Updated)

Prepare effectively for your Nokia 4A0-101 Alcatel-Lucent Interior Routing Protocols and High Availability certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2025, ensuring you have the most current resources to build confidence and succeed on your first attempt.

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Total 315 questions

Given the NSAP address of 49.0012.1234.1234.1234.00, what area does the IS-IS router reside in?

A.

49.0012.1234

B.

49.0012

C.

12.1234

D.

1234

E.

49.1234

Which of the following statements describe the major features of OSPF? Choose two answers.

A.

Fast reroute capability

B.

Control traffic prioritization

C.

Route redistribution

D.

Traffic engineering extensions

E.

Cut through forwarding

Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. How many adjacencies will be formed between them?

A.

None

B.

1

C.

2

D.

3

E.

4

Which of the following conditions will prevent an OSPF adjacency from reaching the full state? Choose three answers.

A.

MTU mismatch

B.

Incorrect subnet mask

C.

System interface not included in OSPF

D.

Area ID not the same

E.

Different metric set on each end of the link

F.

Router ID not defined

An Alcatel-Lucent 7750 SR receives a route via an IS-IS LSP with internal reach ability, and receives the same route via an OSPF type 5 LSA. If al protocol preferences are default, which route will be installed in the route table?

A.

The route learned via IS-IS will be installed.

B.

The route learned via the OSPF type 5 LSA will be installed.

C.

Both routes will be installed, if ECMP is enabled.

D.

Both routes will be installed, regardless of whether ECMP is enabled.

Which type of IS-IS router is summarization most likely to be configured on?

A.

L1 routers

B.

L2 routers

C.

L1/L2 routers

D.

L1 and L2 routers

At what point is the LSP SRM flag cleared when an LSP is sent on an IS-IS point-to-point link?

Choose two answers.

A.

As soon as the LSP is transmitted.

B.

When an acknowledgment is received in the form of PSNP.

C.

When an older LSP is received.

D.

When a newer or same aged LSP is received.

E.

Only when a newer LSP is received

Which of the following statements regarding IS-IS Hello packets are true? Choose two answers.

A.

Different types of Hello packets are exchanged on point-to-point networks than on broadcast networks.

B.

L1/L2 Hello packets are exchanged on broadcast links.

C.

Different L1 and L2 Hello packets are exchanged on broadcast links.

D.

By default, Hello packets are sent every 5 seconds, and the timeout to declare a neighbor down is 15 seconds.

Click the exhibit button.

What can you deduce from the show command on router R6?

A.

The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment. The DR for this segment would be the router with router ID 10.10.10.5.

B.

The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment; however, this command does not indicate whether 10.10.10.3 or 10.10.10.5 is the DR or BDR.

C.

The router R6 interface is in a multi-access segment. It is the BDR, which is why it is not adjacent to the other routers.

D.

The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment. The DR for this segment would be the router with router ID 10.10.10.3.

Click the exhibit button.

In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. How many type 4 LSAs will be present in the network?

A.

One.

B.

One for each of the routers in area 0

C.

One for each of the external routes exported by router R1.

D.

Type 4 LSAs are not generated in this network topology.

Click the exhibit button.

Routers R1 „ R2, and R3 are running a classful routing protocol between them. Assuming that router R1 advertises all directly connected networks, how will these networks be represented in router R3's routing table?

A.

Router R3's routing table can only contain one of the routes, which will result in route flapping.

B.

Router R3's routing table will have one entry for 10.1.1.0/24 and one entry for 10.1.2.0/24.

C.

The networks will be represented with one entry of 10.0.0.0/8 in router R3's routing table.

D.

The networks will be represented with one entry of 10.0.0.0/24 in router R3's route table.

Click the exhibit button.

In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Which of the following statements regarding the OSPF LSAs in the network is true?

A.

Router R1 generates a type 5 LSA that is flooded through all OSPF areas.

B.

Router R1 generates a type 7 LSA that is flooded through all OSPF areas.

C.

Router R1 generates a type 5 LSA that is flooded through area 1. Router R2 generates a type 7 LSA that is flooded through areas 0 and 2.

D.

Router R1 generates a type 7 LSA that is flooded through area 1. Router R3 generates a type 5 LSA that is flooded through areas 0 and 2.

When IS-IS elects a DIS, what is used as the tie breaker on an Alcatel-Lucent 7750 SR, if the priorities are the same?

A.

The system ID.

B.

The loopback address.

C.

The sequence number of the Hello packet.

D.

The device that first initiated communication becomes the DIS

E.

The highest interface MAC address.

Click the exhibit button.

What triggers convergence of the routing protocol when the link between switch 1 and switch 2 goes down?

A.

Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of Hello timeouts. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

B.

Convergence is triggered when the physical interfaces between routers R1 and R2 go down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

C.

Convergence will not be triggered because switches cannot run routing protocols between them.

D.

Convergence is triggered when the switches notify the routers about the link state information. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged

E.

Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

Which of the following statements apply to link state protocol behavior? Choose three answers.

A.

Routers broadcast the entire route table to all neighbors.

B.

Information about directly connected links is sent to all neighbors.

C.

An adjacency database is maintained by each router.

D.

The sequence number for an update is incremented as it is flooded from router to router.

E.

The topological database is the same for all routers in a single area.

Click the exhibit button.

In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming that there are no stub networks, which of the following statements regarding type 4 LSA generation is true?

A.

Router R1 generates a type 4 LSA that is flooded to areas 0, 1, and 2.

B.

Router R3 generates a type 4 LSA that is flooded to areas 0, 1, and 2.

C.

Router R3 generates a type 4 LSA that is flooded to areas 0 and 2.

D.

Router R3 generates a type 4 LSA that is flooded to area 0, and router R6 generates a type 4 LSA that is flooded to area 2.

Which OSPFv3 LSA type is generated by an ABR to advertise prefixes from one area to another?

A.

AS External

B.

Intra-Area Prefix

C.

Inter-Area Router

D.

Inter-Area Prefix

Click on the exhibit.

Router R2 has a directly connected interface to network 192.168.3.0/24 that is included in IS-IS.

If router R4 redistributes the IS-IS route to 192.168.3.0/24 into OSPF, router R3 will receive two routes to 192.168.3.0/24. Assume that all IS-IS routers are L1/L2 capable and are in the same area.

Which of the following is TRUE?

A.

Router R3 will install the IS-IS route in it's routing table.

B.

Router R3 will install the OSPF route in it's routing table.

C.

Router R3 will install an OSPF route and an IS-IS route in it's route table.

D.

There is not enough information to answer the question.

Click on the exhibit.

192.168.3.1 is a loopback interface on router R2 and is distributed to OSPF area 0, but the ping fails from router R3.

Which of the following is a possible solution to the problem?

A.

Add the "originate-default-route" option in the NSSA area configuration on router R3.

B.

Add the "summaries" option to the NSSA area configuration on router R1.

C.

Configure a static route on router R1 to 192.168.3.1.

D.

Configure a default route on router R2.

Which of the following about Type 4 LSAs is FALSE?

A.

A Type 4 LSA is not generated in a single area AS.

B.

A Type 4 LSA is generated by the ABRs of the area that contains the ASBR.

C.

A Type 4 LSA advertises the external networks connected to the ASBR.

D.

A Type 4 LSA is not flooded in the area that contains the ASBR.

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