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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

Which of the following is a primary cause of IP hyper-aggregation?

A.

IP routing protocols do not always select the best route to a destination.

B.

IP routing protocols always select multiple routes to a destination.

C.

IP routing protocols do not make use of all available network attributes to select a path

D.

Improper network design results in limited network path redundancy.

Which type of OSPF LSA has the following characteristics: It is flooded only within the area it originates from and can be originated by any OSPF router within the area (including non-DR routers).

A.

Type 1 Router LSA

B.

Type 2 Network LSA

C.

Type 3 Summary LSA

D.

Type 4 ASBR LSA

Refer to the exhibit below. 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. Which of the following statements best describes the number of IS-IS adjacencies and the number of LSPs in the LSDB of R1 AFTER IPv6 has been configured?

A.

R1 has one IS-IS adjacency and one LSP.

B.

R1 has one IS-IS adjacency and two LSPs.

C.

R1 has one IS-IS adjacency and four LSPs.

D.

R1 has two IS-IS-adjacencies and two LSPs

E.

R1 has two IS-IS adjacencies and four LSPs

Click on the exhibit.

Given the contents of the Router LSA, which of the following best describes the local topology of the router?

A.

The router has a system interface, two point-to-point interfaces and one broadcast interface.

B.

The router has a system interface, two passive interfaces, two point-to-point interfaces and one broadcast interface.

C.

The router has a system interface, two point-to-point interfaces and one virtual link.

D.

The router has a system interface, two passive interfaces, two point-to-point interfaces and one virtual link.

Click on the exhibit button below.

LSP 1's link between routers R3 and R6 has failed, and the RESV state at router R3 has timed out. Which of the following actions will router R3 initiate?

A.

Send a Path Tear message towards router R6.

B.

Send a Path Tear message towards router R1.

C.

Send a Resv Tear message toward router R6.

D.

Send a Resv Tear message toward router R1.

Which of the following statements concerning OSPFv3 is false?

A.

MD5 Authentication is not supported.

B.

Router LSAs do not carry IPv6 prefix information

C.

NSSA is not supported in OSPFv3.

D.

OSPFv3 uses a 32-bit router ID.

Which of the following statements regarding admin groups is FALSE?

A.

Admin groups can be configured using the command "configure>router>mpls>admin-group".

B.

CSPF uses the information defined by admin groups when paths are computed for constraint-based LSPs.

C.

By default, interfaces for which MPLS has been enabled are in the default admin group.

D.

A LSP can make use of admin groups for constraint-based path calculations by including or excluding the admin group

An interface has a MAC address of 24-16-4d-16-b5-3d. What link-local address will be assigned to this interface?

A.

fe80::2416:4dff:fe16:b53d

B.

fe80::2616:4dff:fe16:b53d

C.

ff80::2416:4dff:fe 16:b53d

D.

ff80::2616:4dff:fe 16:b53d

E.

fd80::2416:4dff:fe16:b53d

How have Traffic Engineering extensions to IS-IS been implemented?

A.

By defining new LSAs for the IS-IS protocol.

B.

By utilizing the OSPF opaque LSAs to maintain interoperability with OSPF routing domains

C.

By defining new TE extension TLVs to the IS-IS protocol.

D.

By enabling CSPF algorithm extensions that allow link state TE to be implemented.

Click on the exhibit.

What type of OSPFv3 LSA is shown?

A.

Router LSA

B.

Network LSA

C.

Intra-Area Prefix LSA

D.

Link LSA

Click on the exhibit.

Given the output, which of the following is the most accurate statement about the network?

A.

There are five broadcast links and there are no point-to-point links.

B.

There are five broadcast links and there are five point-to-point links.

C.

There are five broadcast links. It's not possible to say how many point-to-point links there are.

D.

It's not possible to say how many broadcast or point-to-point links there are.

Click on the exhibit.

A static route has been configured on router R1 to reach the PC at 139.120.121.2. What else is required to make the ping succeed?

A.

A default route on router R2 to router R1.

B.

A default route on the PC to router R2.

C.

A static route on the PC to router R2 and a static route on router R2 to the PC.

D.

A default route on router R1 to router R2.

An OSPF adjacency is stuck in the exstart state. What is the most likely cause?

A.

The MTU does not match on both interfaces.

B.

OSPF is not enabled on one of the routers.

C.

The router ID is the same on both routers.

D.

An OSPF Hello has not been received from the neighbor.

E.

The interfaces are configured as point-to-point on one side and broadcast on the other.

Click on the exhibit.

What is the correct command to configure a default route on the Alcatel-Lucent 7750SR R2?

A.

config> static-route 0.0.0.0/0 next-hop 10.1.2.2

B.

config>router> static-route 0.0.0.0 255.255.255.255 next-hop 10.1.2.1

C.

config>router> static-route 0.0.0.0/0 next-hop 10.1.2.2

D.

config>router> static-route 0.0.0.0/0 next-hop 10.1.2.1

Router R3 signals an LSP, reserving 1Gbps bandwidth on a 10Gbps link. RSVP configuration limits reservable bandwidth to 20 percent on the egress interface. Which of the following statements is true?

A.

The egress RSVP interface has 80 percent bandwidth unreserved.

B.

LSPs can reserve an additional 9.9 Gbps bandwidth on this RSVP interface.

C.

The head end reserves 100Mbps for the LSP.

D.

The egress RSVP interface has 1Gbps bandwidth unreserved.

Which of the following statements are true? Choose two answers

A.

Selected labels from the FIB are populated to the LIB.

B.

Selected labels from the LIB are populated to the LFIB.

C.

Selected routes from the RIB are populated to the FIB.

D.

Selected routes from the FIB are populated to the RIB.

E.

All labels from the LIB are populated to the LFIB.

Which is the OSPFv3 equivalent to the OSPFv2 Type 7 LSA?

A.

Intra-Area Prefix LSA

B.

Router LSA

C.

AS External LSA

D.

NSSA LSA

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.

What will be the preference of the two routes?

A.

OSPF internal preference and IS-IS Level 1 internal preference.

B.

OSPF internal preference and IS-IS Level 1 external preference.

C.

OSPF external preference and IS-IS Level 1 internal preference.

D.

OSPF external preference and IS-IS Level 2 internal preference.

E.

OSPF external preference and IS-IS Level 1 external preference.

Which of the following statements best describes downstream unsolicited label distribution?

A.

An LER may answer requests for label mappings immediately, without waiting for a label mapping from the next-hop.

B.

An LER may advertise label mappings to all peers for which it might be a next-hop for a given FEC.

C.

An LER propagates a label mapping downstream for a FEC. only if it has a label mapping for the FEC next-hop.

D.

An LER will only distribute a label for a FEC when it has been requested to do so.

Click on the exhibit.

OSPF is operational on all links in the network diagram, all links have the same cost and all routers are configured with an ECMP value of 4. Router R4 advertises the prefix 192.168.3.0/24 into OSPF.

How many entries for prefix 192.168.3.0/24 will be l n router R1's routing table?

A.

0

B.

1

C.

2

D.

3

E.

4

How many bits of the MPLS header are used for the label field?

A.

16

B.

20

C.

24

D.

25

E.

32

Which of the following are top level TLV types defined for OSPF-TE? Choose two answers.

A.

Router address

B.

Traffic engineering metric

C.

Maximum bandwidth

D.

Link

E.

Admin Group

An OSPF router receives an update in which the sequence number, age, and checksum are the same as the entry already in the topological database. What action does the router take?

A.

The link-state information is not populated in the database, but is forwarded to all neighbors.

B.

The link-state information already in the database is overwritten and the age is reset.

C.

The link-state information is not populated in the database and an acknowledgement is sent.

D.

The link-state information is regarded as old and nothing is done.

E.

A link-state request is performed to increase the sequence number.

If routers R1 and R2 have a Level 1 and Level 2 IS-IS adjacency, which of the following statements are true? Choose two answers.

A.

Routers R1 and R2 are in different areas,

B.

Routers R1 and R2 are in the same area.

C.

Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is point-to-point.

D.

Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is broadcast.

E.

Routers R1 and R2 will send a Level 1/2 Hello PDU, if the interface type between them is broadcast.

Click the exhibit button.

Given the diagram below, what path will traffic follow from router R6 to router R3, and from router R3 to router R6, if IS-IS is the routing protocol? The numbers beside the links are the metrics for that link.

A.

Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3- R2-R5-R6).

B.

Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R2-R5-R6).

C.

Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R7-R5-R6).

D.

Router R6 to router R3 will follow (R6-R5-R7-R4-R3). Router R3 to router R6 will follow (R3-R4-R7-R5-R6).

How many bytes make up the system ID in an IS-IS NSAP address on the Alcatel-Lucent 7750 SR?

A.

4 bytes

B.

6 bytes

C.

8 bytes

D.

Variably between 4 and 8 bytes

What command allows analysis of the Dijkstra calculation on the Alcatel-Lucent 7750 SR?

A.

There is no such calculation in IS-IS

B.

Show router isis database

C.

Show router isis dijykstra

D.

Show router isis spf

Refer to the exhibit.

Assume that OSPFv3 is properly configured on all routers and that R4 advertises its system prefix into Area 0. Which of the following statements best describes how R5 learns R4's IPv6 system prefix?

A.

With a Router LSA originated by R1

B.

With a Router LSA originated by R5

C.

With a Router LSA originated by R4

D.

With an Inter-Area Prefix LSA originated by R1

E.

With an Inter-Area Prefix LSA originated by R5

F.

With an Inter-Area Prefix LSA originated by R4

The Alcatel-Lucent 7750 SR supports which two of the OSPF area types below?

A.

Not So Stubby Areas

B.

Level 1 Areas

C.

Stub Areas

D.

Partially Stubby Areas

What causes an adjacency to change from down to two ways?

A.

When a link state update is received in response to a link state request.

B.

When a router receives a Hello packet that contains its own router ID in the neighbor list from a neighbor.

C.

When a router receives a database description packet from a neighbor.

D.

When a link state acknowledgement is received in response to a link state update.

What is the default preference value for a static route in the Alcatel-Lucent 7750 SR?

A.

0

B.

5

C.

10

D.

15

A router is configured with the command "configure router ecmp 4". There are two best paths to a given destination with an equal cost in the IGP. Which of the following best describes the handling of traffic to this destination?

A.

The router installs two routes for the destination with two different next hops. A hashing algorithm is used to distribute traffic over the two paths.

B.

The router installs two routes for the destination with two different next hops. Traffic is evenly distributed over the two paths.

C.

The router installs four routes for the destination with four different next hops. A hashing algorithm is used to distribute traffic over the four paths.

D.

The router installs four routes for the destination with four different next hops. Traffic is evenly distributed over the four paths.

E.

The router installs one route for the destination. Traffic is evenly distributed over the two paths.

What is the default preference value for a static route in the Alcatel-Lucent 7750 SR router?

A.

0

B.

5

C.

10

D.

15

Which of the following statements regarding distance vectors protocols are true?

(Choose two answers).

A.

RIPv1, RIPv2, and BGP are distance vector protocols.

B.

OSPF and IS-IS are distance vector protocols.

C.

Routing tables are exchanged between neighbors; however, no routing table is transmitted beyond the immediate neighbor.

D.

Distance vector protocols use the Dijkstra SPF algorithm.

E.

Routers that participate in distance vector routing protocols maintain full knowledge of distant routers and how they interconnect

Which of the following statements regarding the election of the designated router (DR) by OSPF routers are true? (Choose two)

A.

The router with the lowest priority is the DR.

B.

The router with the highest priority is the DR.

C.

If priorities are the same, the DR is chosen based on the lowest RID.

D.

If priorities are the same, the DR is chosen based on the highest RID.

What is the primary purpose of classless interdomain routing (CIDR)?

A.

To support classful routing protocols.

B.

To allow IP routes to be defined using any number of bits for the network portion of the address.

C.

To allow interdomain routing between an IGP and EGP such as OSPF and BGP.

D.

To simplify the allocation of IP address space by defining a fixed size for the network portion of the address for each of the address classes.

What are the types of networks supported on an Alcatel-Lucent 7750 SR for OSPF? (Choose 2)

A.

Broadcast

B.

Non-Broadcast Multi-Access

C.

Point-to-Point

D.

Point-to-Multipoint

Which of the following statements regarding IS-IS LSPs is true?

A.

There are three types of LSPs: L1, L2 and L1/L2.

B.

An LSP packet contains the ATT bits and the IS-type bits.

C.

The lower the LSP sequence number, the more current the update.

D.

Separate databases are maintained for L1 „ L2, and L1/L2 LSPs.

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.

What types of routers can an IS-IS L1 router form adjacencies with? Pick all that apply.

A.

L1 routers in the same area

B.

L1 routers in other areas

C.

L2 routers in the same area

D.

L2 routers in other areas

E.

L1/L2 router in the same area

F.

L1/L2 routers in other areas

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