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4A0-C01 Nokia NRS II Composite Exam Free Practice Exam Questions (2025 Updated)

Prepare effectively for your Nokia 4A0-C01 Nokia NRS II Composite Exam 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 852 questions

Click on the exhibit.

Router R2 learns the networks shown from IS-IS. Router R2 is configured to redistribute routes from IS-IS to OSPF as shown. Assume the OSPF and IS-IS adjacencies are operational.

How many OSPF Type 5 LSAs will router R1 receive from router R2?

A.

0

B.

1

C.

2

D.

3

E.

4

When a router performs the SPF calculation, which router is used as the root of the shortest path tree?

A.

The router with the least number of 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 regarding LSP path configuration are true? (Choose three)

A.

The path must include at least one hop.

B.

The path may be used multiple times in a single LSP.

C.

The path may comprise loose hop entries only.

D.

The path must define the LSP's tail end.

E.

The path may be used for multiple LSPs.

In OSPFv3, which of the following LSA types carries prefixes and is only flooded in the area where it is generated?

A.

Link

B.

AS External

C.

Router

D.

Intra-Area Prefix

Which of the following describes the purpose of 6over4 tunneling?

A.

To give IPv6 traffic preferential routing over IPv4 routes.

B.

To allow core routers running only IPv6 protocols to carry IPv4 traffic.

C.

To give IPv4 only routers the ability to route based on IPv6 addresses.

D.

To allow IPv6 traffic to pass through an IPv4 network.

Which of the following best describes constraint-based routing?

A.

A mechanism that implements opaque LSAs.

B.

A mechanism that computes routes based on defined user requirements.

C.

A mechanism that allows the IGP shortest path to be used.

D.

A mechanism that allows RSVP or LDP signaling to use a route other than the IGP best route to establish a LSP.

Which of the following is NOT a field in the IPv6 header?

A.

Next Header

B.

Traffic Class

C.

Hop Limit

D.

Fragment Offset

E.

Flow Label

Which of the following conditions must a router meet for an LSP path's RSVP session to exist? Choose two answers

A.

The router must build the Path State Block (PSB).

B.

The router must build the Reservation State Block (RSB).

C.

The router must build the Session State Block (SSB)

D.

The router must send the second RESV refresh message.

E.

The router must receive the second PATH refresh message.

Click on the exhibit.

The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. An operator successfully configures multi-topology IS-IS routing so that the IPv6 system addresses are also exchanged between routers.

After IPv6 has been configured, which of the following is TRUE?

A.

Router R2 has two IS-IS adjacencies and two LSPs

B.

Router R2 has two IS-IS adjacencies and three LSPs

C.

Router R2 has two IS-IS adjacencies and four LSPs

D.

Router R2 has three IS-IS adjacencies and three LSPs

E.

Router R2 has three IS-IS adjacencies and four LSPs

F.

Router R2 has three IS-IS adjacencies and six LSPs

On which type of IS-IS router is summarization most likely to be configured?

A.

L1 routers

B.

L2 routers

C.

L1/L2 routers

D.

L1 and L2 routers

True or False? MPLS may use an existing data link layer header field to identify a label, instead of using a specific MPLS header

A.

TRUE

B.

FALSE

Click on the exhibit.

OSPF router R2 has both point-to-point and broadcast interfaces and it is not a DR for any interfaces. Router R2 detects the link failure between itself and router R1.

Which of the following is correct?

A.

Router R2 sends an update to 224.0.0.5 on its broadcast and point-to-point interfaces. The DR does not send any updates.

B.

Router R2 sends an update to 244.0.0.5 on its point-to-point interfaces. The DR sends an update to 224.0.0.6 on the broadcast network.

C.

Router R2 sends an update to 224.0.0.5 out its point-to-point interfaces and an update to 224.0.0.6 out its broadcast interface. The DR sends updates to 224.0.0.5 on the broadcast network.

D.

Router R2 sends an update to 224.0.0.6 out its point-to-point interfaces and an update to 224.0.0.5 out its broadcast interface. The DR sends an update to 224.0.0.6 on the broadcast networks.

On a point-to-point link, two directly connected routers set different interface hello timeout values. Router R1 uses 15 seconds, while router R2 uses 30 seconds. What happens to the LDP adjacency?

A.

The adjacency forms with the lower timeout value

B.

The "show router Idp session" command output displays the adjacency in state "init"

C.

The adjacency forms with the higher timeout value

D.

The adjacency times out after 30 seconds

Click on the exhibit button below.

LSP "toR8-5" requests fast reroute protection on the primary loose path. What could be done to remove the Failure Code shown?

A.

CSPF must be enabled at head-end on fast reroute protected loose path LSPs

B.

Fast reroute must first be enabled on the downstream routers.

C.

CSPF must be enabled on all downstream loose hop routers.

D.

Global revertive path optimization must be enabled so the path will be re-optimized around a failed node.

Click on the exhibit button.

The policy on router R2 is applied as an LDP export policy. What FECs now appear in router R2's LIB?

A.

Local FECs, not including those in the 192.168.1.0/24 address space.

B.

Only system ID FECs may appear in the LIB.

C.

Any local FECs, except those with a 24 bit mask.

D.

Local FECs in the 192.168.1.0/24 address space

In an OSPF network, which of the following is NOT a result of manual summarization on an ABR?

A.

It can reduce the topological database size.

B.

It can reduce the size of the route table.

C.

It can reduce the number of Summary LSAs.

D.

It can reduce the number of Router LSAs.

What MPLS function should be performed by a router that receives a data packet containing an MPLS label value of 3?

A.

A router will never receive a packet containing this label value.

B.

Request a new label from the peer that provided this label.

C.

Pop the label.

D.

PUSH an additional label onto the label stack.

E.

Signal a new label to the peer that sent the packet.

Click on the exhibit button below.

Given the configuration below, which of the following scenarios is FALSE?

A.

Both the primary and secondary paths are explicitly defined.

B.

The primary path is active and the secondary path is in hot standby.

C.

The LSP defined will use the primary path and will signal the secondary path to become active if the primary path fails.

D.

The LSP has the same source and destination for both primary and secondary paths.

Which type of OSPF LSA lists the routers attached to a broadcast network?

A.

Type 1

B.

Type 2

C.

Type 3

D.

Type 4

E.

Type 5

A service provider is deploying a 6over4 tunnel to connect a customer's branch office IPv6 network to the corporate headquarters as shown in the exhibit. Which command is used to create a default route on PE2 for the branch office network?

A.

configure router static-route 0.0.0.0/0 indirect 10.10.10.2

B.

configure router static-route 0.0.0.0/0 indirect 2001:DB8:1:100::1

C.

configure router static-route ::/0 indirect 10.10.10.2

D.

configure router static-route::/0indirect2001:DB8:1:100::1

E.

configure outer static-route::/0indirect2001:DB8:1:101::1

A new router is added to a broadcast network. What is used by IS-IS as the tie breaker for selecting the DIS if the priorities are the same?

A.

The router with the highest system ID.

B.

The router with the highest loopback address.

C.

The Hello packet with the highest sequence number.

D.

The existing DIS remains the DIS.

E.

The router with the highest interface MAC address.

Which of the following best describes an OSPF Type 3 LSA?

A.

A Type 3 LSA is generated by an ASBR only when route summarization is configured.

B.

A Type 3 LSA is generated by an ABR only when route summarization is configured.

C.

A Type 3 LSA is generated by an ASBR to describe routes to routers outside the area.

D.

A Type 3 LSA is generated by an ABR to describe routes to routers outside the area.

Which LSA type is not found in point-to-point only OSPF networks?

A.

Type 1 Router LSA

B.

Type 2 Network LS A

C.

Type 3 Summary LSA

D.

Type 5 External LSA

What type of LSA is used to flood information about prefixes from one OSPF area to other attached areas?

A.

Type 1

B.

Type 3

C.

Type 4

D.

Type 7

Click on the exhibit.

What does the field "2001:DB8:111::/64" represent?

A.

The router's system address.

B.

The next-hop prefix.

C.

The interface's global prefix.

D.

The next-hop system address.

Click on the exhibit.

Router R1 learns the network 192.168.3.0/24 from IS-IS. Given the OSPF configuration shown, why isn't the 192.168.3.0/24 route in router R3's route table?

A.

The route policy should be applied as an import policy.

B.

The route policy should say "from protocol isis" instead of "from protocol direct".

C.

The ASBR configuration should be removed.

D.

The interface between routers R1 and R3 must be in OSPF area 0.

Which of the following best describes the actions taken by an IS-IS router after it receives an LSP on a broadcast interface that is newer than the one in its database?

A.

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

B.

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

C.

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

D.

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

Which of the following statements best describes the function of an OSPF Type 4 LSA?

A.

A Type 4 LSA is originated by an ABR to describe a route to an ASBR to routers outside the area.

B.

A Type 4 LSA is originated by an ASBR to describe a route to itself to routers outside the area.

C.

A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the backbone area to provide routing information.

D.

A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the stub area to provide routing information.

Click on the exhibit button below.

Under which condition might the peer LDP ID 10.10.10.2:0 entry show state "Nonexistent"?

A.

When the interface to the peer router is down.

B.

When router R1 has no route to the peer address 10.10.10.2.

C.

When the adjacency between the two routers fails.

D.

When the targeted session is not yet configured.

When a device receives a labeled packet, which of the following can occur?

A.

The packet can only be forwarded as an unlabeled packet.

B.

The packet can be forwarded as a labeled or unlabeled packet, depending on the received label value.

C.

The packet can be forwarded as a labeled or unlabeled packet, depending on the destination IP address in the payload

D.

The packet can only be forwarded as a labeled packet.

Which of the following regarding the IS-IS CSNP is FALSE?

A.

CSNPs are used to maintain consistency in the Link-State database.

B.

CSNPs are advertised before an adjacency is formed with another router.

C.

There are two types of CSNPs: Level 1 and Level 2.

D.

The CSNP lists the LSPs in the router's database

Click on the exhibit button below.

Given the following fast reroute protected LSPs:

-LSP1.R1-R4-R5-R3

-LSP2.R1-R4-R5-R2

Which routers become bypass tunnel PLRs? Choose two answers

A.

Router R1

B.

Router R2

C.

Router R3

D.

Router R4

E.

Router R5

Click on the exhibit button below.

With fast reroute enabled, and given the following:

    Two protected LSPs with the path R1-R2-R3

    Both LSPs enable facility bypass and link protection.

When router R1 is the PLR, which router becomes the MP?

A.

Router R1

B.

Router R2

C.

Router R3

D.

Router R4

E.

Router R5

Click on the exhibit.

If router R2 re-distributes the IS-IS route 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 OSPF route in its routing table.

B.

Router R3 will install the IS-IS route in its routing table

C.

Router R3 will install an OSPF route and an IS-IS route in its routing table.

D.

There is not enough information to answer the question.

Which of the following are features of RSVP-TE? Choose three answers.

A.

It supports IGP-based LSPs.

B.

It supports constrained path LSPs.

C.

It does not support loose explicit path LSPs.

D.

It is recommended for use in Traffic Engineering applications.

E.

It cannot be used with facility backup fast reroute.

Which of the following indicates the path over which an LSP's tail end router will return an RSVP RESV message?

A.

The IGP FIB.

B.

The Reservation State Block (RSB)

C.

The Path State Block (PSB)

D.

The opaque database.

Link-state PDUs include an age field. Which of the following is FALSE?

A.

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

B.

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

C.

Aging helps ensure that links, which are no longer part of the topology, will eventually get removed from the LSDB.

D.

The age value is updated as the information is flooded throughout the network and when it is in the LSDB.

Which of the following statements regarding LDP-over-RSVP are true? (Choose two)

A.

Targeted sessions must exist between all routers in the tunnel's path.

B.

Each LDP interface must be configured to support LDP tunneling.

C.

LDP prefixes resolve to an RSVP LSP, rather than to a physical egress interface.

D.

RSVP LSPs must exist between each PE-ABR pair, or ABR-ABR pair in each area.

When IS-IS is electing 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 on the exhibit.

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.

B.

Convergence is triggered when the physical interfaces between routers R1 and R2 go down.

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 info.

E.

Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is down.

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