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Nokia NRS II Composite Exam: OSPF version Question and Answers

Nokia NRS II Composite Exam: OSPF version

Last Update Sep 18, 2025
Total Questions : 298

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Questions 1

Which of the following LSA types stay within an OSPF area, and are not flooded outside of the area? Choose two answers.

Options:

A.  

Router LSA

B.  

Network LSA

C Summary network LSA

C.  

Summary router LSA

D.  

Type 5 (AS external) LSAs

Discussion 0
Questions 2

What labels are encapsulated in the tunnels used by a 6PE deployment?

Options:

A.  

The inner label is the IPv4 Explicit Null. The outer label is the MPLS transport label,

B.  

The inner label is an MPLS transport label. The outer label is the IPv4 Explicit Null.

C.  

The inner label is the IPv6 Explicit Null. The outer label is an MPLS transport label.

D.  

The inner label is an MPLS transport label. The outer label is the IPv6 Explicit Null.

Discussion 0
Questions 3

Click on the exhibit.

Which of the following is FALSE?

Options:

A.  

The router can reach prefix 192.10.1.2/32 through a RSVP-TE tunnel.

B.  

The router can reach prefix 192.10.1.2/32 through an LDP tunnel.

C.  

The router 10.10.10.2 is the egress router of the prefix 192.10.1.2/32.

D.  

The Isp-ping tool is used to perform a unidirectional LSP test.

Discussion 0
Questions 4

Click the exhibit.

Router R6 is a route reflector with clients R1, R2, R4 and R5. Router R4 receives three routes from router R6 and is configured with ECMP 3. Given the following BGP configuration on routerR4, how many primary and backup paths will be present in router R4's BGP routing table?

Options:

A.  

Three primary paths,

B.  

Two primary paths and one backup path.

C.  

One primary path and two backup paths.

D.  

One primary path and one backup path.

Discussion 0
Questions 5

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

Options:

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.

Discussion 0
Questions 6

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?

Options:

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.

Discussion 0
Questions 7

An Nokia 7750 SR has the BGP configuration shown below. Assuming the router has established BGP sessions to routers R1 and R2, which of the following is TRUE?

Options:

A.  

Both neighbors R1and R2 should be part of AS 65540.

B.  

Neighbor R1should be part of AS 65550, while neighbor R2 should be part of AS 65540.

C.  

Neighbor R1should be part of AS 65550, while neighbor R2 should be part of AS 65560.

D.  

Both neighbors R1and R2 should be part of AS 65560.

Discussion 0
Questions 8

Click the exhibit.

Router R2 receives a route to 192.168.1.0/27 from router R4, and sets the local preference to 110. Router R1 receives a route to 192.168.1.0/27 from router R3, and sets the local preference to 80. Both ASs have a full iBGP mesh. What path does traffic destined to 192.168.1.0/27 take from router R1?

Options:

A.  

R1-R3-R8

B.  

R1-R2-R4-R8

C.  

R1-R3-R4-R8

D.  

R1-R2-R4-R3-R8

Discussion 0
Questions 9

Click on the exhibit.

An LSP traverses R1-R2-R4-R6 and one-to-one fast reroute with link protection is enabled. All links have the same cost. Which of the following about DMP and MP is TRUE?

Options:

A.  

R3 and R5 become DMPs; R6 becomes MP.

B.  

R3 and R5 become DMPs; R4 becomes MP.

C.  

R3, R5, and R6 become DMPs; R4 becomes MP.

D.  

R1, R3, and R5 becomes DMPs; R4 and R6 become MPs.

Discussion 0
Questions 10

Click the exhibit button.

Part of a 6VPE deployment is shown. Which of the following is the correct configuration and context on router CE1 for a BGP peering session with 6VPE1?

Options:

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

Discussion 0
Questions 11

Click on the exhibit.

A fully loose LSP "toR6" is configured. All links have the same cost and all routers are Nokia 7750 SRs. The LSP currently traverses the path R1-R2-R7-R8-R4-R6 and the resignal timer is enabled. Which of the following about this LSP is FALSE?

Options:

A.  

The LSP will switchover to another path if a failure occurs.

B.  

The LSP will switchover to a better path as soon as it is available.

C.  

CSPF must be enabled for this LSP to attempt to find a better path.

D.  

The LSP will switchover to a better path in a MBB fashion.

Discussion 0
Questions 12

If an LSP needs to use an admin group, which of the following configurations is NOT required on the Nokia 7750 SR?

Options:

A.  

Assign an admin group to a MPLS interface.

B.  

Configure CSPF on the LSP.

C.  

Configure at least one strict hop on the LSP path.

D.  

Configure an "include" or "exclude" statement on the LSP path.

Discussion 0
Questions 13

What is the default preference value for a static route in the Nokia 7750 SR router?

Options:

A.  

0

B.  

5

C.  

10

D.  

15

Discussion 0
Questions 14

Click the exhibit button.

Router R2 advertises the network 192.168.3.0/24 to router R1 via OSPF. A route policy has been constructed to discard the route on router R1; however, it is not working. What is the problem?

Options:

A.  

The prefix list reject should be "192.168.3.0/16 exact".

B.  

Router R1 should be configured as an OSPF "asbr".

C.  

The policy "reject" should be set for import rather than export.

D.  

The policy was likely not "committed" after creation.

E.  

This is not possible because OSPF cannot use import policies.

Discussion 0
Questions 15

Which of the following devices inspects the MPLS header in the received packet, and exchanges it for a new MPLS header?

Options:

A.  

iLER

B.  

LER

C.  

LSR

D.  

PE

E.  

eLER

Discussion 0
Questions 16

Which of the following statements about the BGP Advertise External feature is FALSE?

Options:

A.  

It modifies the BGP advertisement logic.

B.  

It improves convergence times and allows for better load sharing.

C.  

It allows a router to advertise multiple external paths for a single prefix.

D.  

It supports both IPv4 and IPv6.

Discussion 0
Questions 17

Which of the following about VPN labels is FALSE?

Options:

A.  

They are signaled between PE devices using MP-BGP.

B.  

They are swapped at each P router as a packet crosses the service provider network.

C.  

They are also known as the inner label or service label.

D.  

They indicate to the egress PE the VPRN to which a packet belongs.

Discussion 0
Questions 18

What happens by default on an Nokia 7750 SR when a null encapsulated SAP receives a frame with a VLAN tag?

Options:

A.  

The original VLAN tag is removed.

B.  

The original VLAN tag is kept.

C.  

The VLAN tag is replaced by a provider tag.

D.  

The VLAN tag is kept and a provider tag is added.

Discussion 0
Questions 19

Click the exhibit.

Routers RR1 and RR2 are route reflectors with the same Cluster-ID. How does router RA treat the updates for prefix 192.168.1.0/27 received from routers RR1 and RR2?

Options:

A.  

Router RA prefers the update received from router RR1.

B.  

Router RA prefers the update received from router RR2.

C.  

Router RA flags both updates as invalid.

D.  

Router RA accepts both updates and flags them as used.

Discussion 0
Questions 20

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 is taken by the router?

Options:

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.

Discussion 0
Questions 21

Which of the following best describes downstream on demand label distribution?

Options:

A.  

An LSR answers requests for label mappings immediately, without waiting for a label mapping from the next-hop.

B.  

An LSR advertises label mappings to all peers for which it might be a next-hop for a given FEC.

C.  

An LSR distributes a label mapping for a FEC when it has been requested to do so.

D.  

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

Discussion 0
Questions 22

Which of the following regarding label population is TRUE?

Options:

A.  

Selected labels from the FIB are populated to the LFIB.

B.  

Selected labels from the RIB are populated to the FI

B.  

C.  

Selected labels from the LIB are populated to the FIB.

D.  

Selected labels from the LIB are populated to the LFIB.

Discussion 0
Questions 23

A confederated AS is comprised of three members. One member is comprised of 4 routers, while the other two members are comprised of 3 routers each. Assuming member ASs are fully meshed and use full mesh iBGP, what is the required number of BGP sessions within the confederation?

Options:

A.  

12

B.  

13

C.  

14

D.  

15

Discussion 0
Questions 24

Which of the following about route distinguishes on the Nokia 7750 SR is TRUE?

Options:

A.  

Route distinguishes are appended to IPv4 prefixes to form IPv6 prefixes.

B.  

CE routers use a route distinguisher to indicate which VPRN they are associated to.

C.  

A route distinguisher combined with an IPv4 prefix produces a VPN-IPv4 prefix.

D.  

Route distinguishes are used to determine which routes a VPRN should import.

Discussion 0
Questions 25

Click the exhibit button.

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?

Options:

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.  

Make a static route on router R1 to 192.168.3.1

D.  

Make a default route on router R2

Discussion 0
Questions 26

What is the result of configuring the following policy statement as a BGP import policy on the Nokia 7750 SR?

Options:

A.  

All BGP routes are accepted.

B.  

All routes matching prefix lists "List-1" and "List-2" are rejected.

C.  

BGP routes matching prefix lists "List-1" or "List-2" are rejected.

D.  

BGP routes matching prefix lists "List-1" and "List-2" are rejected.

Discussion 0
Questions 27

Which of the following statements regarding route reflectors is TRUE?

Options:

A.  

Route reflectors propagate BGP learned routes to their clients.

B.  

Route reflectors require "n" iBGP sessions, where "n" is the number of BGP routers in the AS.

C.  

Route reflectors disable iBGP split horizon for all iBGP peers in the AS.

D.  

Route reflectors do not work in conjunction with confederations.

Discussion 0
Questions 28

Click on the exhibit button below:

Consider the following:

- Router R2 is an ABR in OSPF Areas 0 and 1.

- Router R2 advertises the aggregate prefix 10.10.10.0/24 into Area 1.

- Router R1 in Area 0 generates LDP labels for FECs 10.10.102/31 and 10.10.10.4/31

Router R3 in Area 1 places these FECs in its LIB, but it does not place them in its LFIB. What can you do on router R3 to make it populate these labels in its LFIB?

Options:

A.  

Disable route summarization on router R3

B.  

Enable LDP aggregate prefix match

C.  

Create an import policy to accept these FECs

D.  

Disable LDP exact match on the specified FECs

Discussion 0
Questions 29

Click the exhibit button.

Which of the following would correctly configure routers R2, R3, and R4?

Options:

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

Discussion 0
Questions 30

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

Options:

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

Discussion 0
Questions 31

Which of the following regarding MPLS encapsulation for VPRN services is TRUE?

Options:

A.  

The customer's Layer 3 header is removed at the iLER.

B.  

The customer's Layer 2 header is removed at the iLER.

C.  

The customer's Layer 3 header is removed at the eLER.

D.  

The customer's Layer 2 header is removed at the eLER.

Discussion 0
Questions 32

Which of the following are similarities between OSPF and IS-IS? Choose two answers.

Options:

A.  

Metric is based on hop count.

B.  

Slow convergence after link failures.

C.  

Support hierarchy through the use of areas.

D.  

Support for CIDR.

E.  

Link state updates sent using layer 3 multicast.

Discussion 0
Questions 33

Which of the following about VPRNs is TRUE?

Options:

A.  

Customers must use the same routing protocol as the service provider.

B.  

Customers belonging to the same VPRN service must use the same subnet.

C.  

Service providers only need to perform configurations on the PEs to add additional VPRNs.

D.  

For each VPRN, only one customer can be connected at each PE.

Discussion 0
Questions 34

Click the exhibit.

The operator at PE1 wants to analyze the traffic between CE4 and PE2. On an Nokia 7750 SR, which of the following is required as part of the configuration?

Options:

A.  

Both PE1 and PE2 need a mirror source.

B.  

PE2 needs a mirror source with the remote source specified.

C.  

PE1 needs a mirror source with the remote source specified.

D.  

Both PE1 and PE2 need a mirror destination.

E.  

PE2 needs a mirror destination that specifies a SAP.

Discussion 0
Questions 35

Click on the exhibit.

If the primary path goes down, which secondary LSP path will the head-end router select first?

Options:

A.  

Secondary_Path-1

B.  

Secondary_Path-2

C.  

Secondary_Path-3

D.  

Secondary_Path-4

Discussion 0
Questions 36

What is the source IP address in an OSPF update?

Options:

A.  

224.0.0.5

B.  

224.0.0.6

C.  

The unicast IP address of the interface the update is sent on

D.  

The system address of the router.

Discussion 0
Questions 37

Which of the following statements regarding BGP Fast Reroute is FALSE?

Options:

A.  

BGP Fast Reroute is triggered by IGP events.

B.  

The backup path is pre-computed and installed in the FI

B.  

C.  

BGP Fast Reroute is independent of number of affected prefixes.

D.  

BGP Fast Reroute uses the optimal path to the destination.

Discussion 0
Questions 38

Consider a device that uses per-platform label space; which of the following fields is NOT contained in the LFIB?

Options:

A.  

Incoming label

B.  

Outgoing label

C.  

Incoming interface

D.  

Outgoing interface

Discussion 0
Questions 39

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).

Options:

A.  

Type 1 Router LSA

B.  

Type 2 Network LSA

C.  

Type 3 Summary LSA

D.  

Type 4 ASBR LSA

Discussion 0
Questions 40

Which of the following is considered a best practice for BGP address planning?

Options:

A.  

Advertising external networks into IGP.

B.  

Using system addresses for setting up iBGP sessions.

C.  

Exporting the networks associated with the external links of eBGP peers into BGP.

D.  

Optimizing BGP route table by exporting IGP routes into BGP.

Discussion 0
Questions 41

Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.

Assuming that none of the routers in AS 65540 is configured with "advertise-external", what is the expected output of "show router bgp routes" on router R5?

Options:

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

Discussion 0
Questions 42

Which of the following comparisons between E-pipes and VPLSes is FALSE?

Options:

A.  

They both function as a Layer 2 switch from the service provider's perspective.

B.  

They both support SAP encapsulations of null, dot1Q and Q-in-Q.

C.  

They both use SAPs as the demarcation point between the customer and the provider.

D.  

MAC addresses are learned by VPLSes, but not by E-pipes.

Discussion 0
Questions 43

Which one of the commands below will create a static route to network 2.3.4.0/24 on the AlcatelLucent 7750 SR router?

Options:

A.  

Static route 2.3.4.0 255.255.255.0 next hop 3.4.5.6

B.  

Static-route next-hop 3.4.5.6 2.3.4.0/24

C.  

Static route 2.3.4.0/24 next hop 3.4.5.6

D.  

Static-route 2.3.4.0/24 next-hop 3.4.5.6

Discussion 0
Questions 44

What Nokia 7750 SR OAM tool can be used to verify the end-to-end connectivity of a service?

Options:

A.  

Sdp-ping

B.  

Isp-ping

C.  

Svc-ping

D.  

Sdp-mtu

Discussion 0
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