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  • Exam Name: Nokia NRS II Composite Exam: OSPF version
  • Last Update: Apr 26, 2024
  • Questions and Answers: 298
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4A0-C04 Practice Exam Questions with Answers Nokia NRS II Composite Exam: OSPF version Certification

Question # 6

Which of the following regarding BGP confederations is FALSE?

A.

The entire confederation is viewed as a single AS by an eBGP peer.

B.

Within a confederation, each member AS is considered as a stand-alone AS.

C.

Member ASs within a confederation can use route reflection.

D.

Member ASs must be fully meshed within a confederation.

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Question # 7

Click the exhibit.

4A0-C04 question answer

Given the following configuration of router R1, what can be said about the function of each of AS 65540s routers?

4A0-C04 question answer

A.

Routers R1 and R2 are redundant route reflectors with clients R3 and R4.

B.

Routers R3 and R4 are route reflectors with clients R1 and R2.

C.

Router R1 is a route reflector with clients R2, R3 and R4.

D.

Router R1 is a route reflector with clients R3 and R4.

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Question # 8

Which of the following statements is TRUE?

A.

An OSPF adjacency can be established on an IES interface.

B.

IES allows provider MP-BGP sessions to be extended to customers.

C.

An IES service must use static routes in order to communicate with customer networks.

D.

An IES interface supports OSPF and IS-IS in passive mode only.

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Question # 9

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

A.

iLER

B.

LER

C.

LSR

D.

PE

E.

eLER

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Question # 10

An Nokia 7750 SR receives a route from an eBGP peer with a MED value of 500. What

MED value is sent to iBGP peers?

A.

100

B.

The IGP cost

C.

500

D.

None

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Question # 11

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

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Question # 12

Click on the exhibit.

4A0-C04 question answer

When router R1 forwards a PATH message to router R2, which of the following about the PATH message's IP header is TRUE?

A.

The options field is set to router alert.

B.

The source address is R1's egress interface address.

C.

The destination address is R2's ingress interface address.

D.

The HOP object includes R2's system address.

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Question # 13

A default route for a client is also known as the:

A.

Default path

B.

Default gateway

C.

Gateway path

D.

Proxy ARP

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Question # 14

Which of the following about LDP sessions is TRUE?

A.

Frame mode requires multiple sessions between peers.

B.

The lower transport address initiates the session.

C.

Established LDP sessions run over a TCP connection.

D.

An LDP session is established immediately after Init messages are exchanged between peers.

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Question # 15

On an Nokia 7750 SR, which vc-type will strip service delimiting tags at the ingress PE?

A.

vc-type ether

B.

vc-type vlan

C.

vc-type dotlq

D.

vc-type null

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Question # 16

Which of the following routes is NOT considered an internal route?

A.

A route received from a BGP peer within the same AS.

B.

A route originated by a router in a different cluster of the same AS.

C.

A route received from a BGP peer from a different member AS of a confederation.

D.

A route received from a BGP peer from the same member AS of a confederation.

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Question # 17

Which of the following is NOT a goal of BGP routing policies?

A.

To protect external networks from instability.

B.

To communicate the architecture of an AS to external ASs.

C.

To protect the local AS and other external ASs from bad NLRI.

D.

To optimize ingress and egress traffic patterns to best serve the users of the AS.

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Question # 18

What is the default Nokia 7750 SR TTL of a BGP advertisement between confederation members?

A.

1

B.

32

C.

64

D.

255

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Question # 19

Click the exhibit button.

4A0-C04 question answer

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.

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Question # 20

What is the purpose of a T-LDP session?

A.

It allows link LDP to be configured on the edge devices only.

B.

It is used to signal the transport labels in the provider core.

C.

It allows selective control over which devices are configured for LDP.

D.

It is used to signal the service labels in the provider core.

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Question # 21

Click on the exhibit.

4A0-C04 question answer

The route table on router R2 shows the system address of router R5 but it does not show any of the interfaces from the non-OSPF area.

What may be causing this?

A.

'asbr' is missing from router R1's configuration.

B.

Router R1 needs to have an export policy added to it.

C.

Router R5 does not have an export policy for these prefixes.

D.

Router R1 needs to have an import policy added to it.

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Question # 22

Which of the following regarding label population is TRUE?

A.

Selected labels from the FIB are populated to the LFIB.

B.

Selected labels from the RIB are populated to the FIB.

C.

Selected labels from the LIB are populated to the FIB.

D.

Selected labels from the LIB are populated to the LFIB.

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Question # 23

Click on the exhibit.

4A0-C04 question answer

The partial command output from an Nokia 7750 SR is shown. Which of the following about this LSP path is TRUE?

A.

R4 (10.10.10.4) has established a link protection tunnel.

B.

R6 (10.10.10.6) has established a link protection tunnel.

C.

R2 (10.10.10.2) has established a node protection tunnel.

D.

R1 (10.10.10.1) has not established a node protection tunnel.

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Question # 24

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

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.

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Question # 25

Click the exhibit.

4A0-C04 question answer

After router A receives the BGP update for the 10.3.3.0/24 prefix, which routers will the route be propagated to?

A.

All routers with which it has a BGP session.

B.

All routers with which it has a BGP session, except the router it received the update from, which is router B.

C.

All routers with which it has a BGP session, except the router it received the update from, which is router C.

D.

All routers with which it has a BGP session, except the router it received the update from, which is router D.

E.

Only eBGP neighbors.

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Question # 26

Click the exhibit.

4A0-C04 question answer

Which of the following is a valid confederation configuration for Router R2?

4A0-C04 question answer

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 27

How many service labels must be signaled to bring up a fully-meshed VPLS among three PE routers?

A.

1

B.

3

C.

6

D.

12

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Question # 28

Click the exhibit button.

4A0-C04 question answer

If router R2 redistributes the IS-IS route to 192.168.3.0/24 into OSPF, router R3 preference of these two routes? Choose two answers.

A.

The OSPF internal preference

B.

The IS-IS Level 1 internal preference

C.

The IS-IS Level 2 internal preference

D.

The OSPF external preference

E.

The IS-IS Level 2 external preference

F.

The IS-IS Level 1 external preference

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Question # 29

When an OSPF adjacency is stuck in the "ExchStart" 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.

A OSPF Hello has not been received from the neighbor

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Question # 30

Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

4A0-C04 question answer

A.

"client1" routes will be tagged with communities "North" and "West".

B.

"client1" routes will be tagged with community "West".

C.

"client1" routes will be tagged with community "North".

D.

"client1" routes will be rejected.

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Question # 31

Which of the following statements regarding BGP shortcuts is FALSE?

A.

MPLS tunnels are used to carry transit traffic across the network.

B.

A full mesh of iBGP peering sessions is not required,

C.

Edge and transit routers need to be configured with BGP.

D.

The transit routers need to support LDP or RSVP-TE LSPs.

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Question # 32

Which of the following about transport and service tunnels is FALSE?

A.

Service tunnels are unidirectional.

B.

Transport tunnels are unidirectional.

C.

A service will use the same service label for every hop.

D.

A local service requires a transport tunnel.

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Question # 33

An operator configures an Nokia 7750 SR with a loopback interface and IPv6 address. The operator then configures a routing policy to redistribute the loopback prefix into OSPFv3. What type of LSA is used to advertise the route to other OSPFv3 routers in the same area?

A.

Router LSA

B.

AS External LSA

C.

Intra-Area Prefix LSA

D.

Inter-Area Prefix LSA

E.

Network LSA

F.

None of the statements are correct.

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Question # 34

Which of the following fields does NOT appear in the MPLS label header?

A.

Label

B.

Frame check sequence

C.

Traffic Class (previously called Experimental)

D.

Time To live

E.

Bottom of stack bit

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Question # 35

An IS-IS TE enabled router has an interface on a 500Mbps link and it is configured with a 25% subscription. If this interface is not used by any LSPs. what value will be shown in the Reservable Bandwidth sub-TLV?

A.

125 Mbps

B.

500 Mbps

C.

625 Mbps

D.

2000 Mbps

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Question # 36

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

A.

Router LSA

B.

Network LSA

C Summary network LSA

C.

Summary router LSA

D.

Type 5 (AS external) LSAs

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Question # 37

Click the exhibit.

4A0-C04 question answer

The two PEs are providing 6VPE and IPv4 VPRNs. The core network is IPv4/MPLS. Which of the following is the BGP family configuration for the MP-BPG on the PEs?

A.

family ipv4 ipv6

B.

family vpn-ipv4ipv6

C.

family vpn-ipv4 vpn-ipv6

D.

family ipv6 vpn-ipv6

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Question # 38

Click the exhibit.

4A0-C04 question answer

The output is from PE router R4 about VPRN service 100. How many prefixes have been learned from the MP-BGP protocol?

A.

0

B.

2

C.

3

D.

6

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Question # 39

From what range are 16-bit private AS numbers selected?

A.

64496 – 64511

B.

1 – 56319

C.

64512-65534

D.

64513-65535

E.

There are no defined private AS numbers; there are only private IP addresses.

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Question # 40

Click the exhibit.

4A0-C04 question answer

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?

4A0-C04 question answer

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 41

Which of the following statements best describes an OSPF type 3 LSA?

A.

An OSPF type 3 LSA is an intra-area LSA, generated by the ABR only when route summarization is configured.

B.

An OSPF type 3 LSA is an inter-area LSA, generated by the ABR only when route summarization is configured.

C.

An OSPF type 3 LSA is an inter-area LSA, generated by an ASBR to describe external routes.

D.

An OSPF type 3 LSA is an inter-area LSA, generated by the ABR to describe a route to neighbors outside the area.

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Question # 42

What command could be used to verify proper configuration of a static route in an Nokia 7750 SR router?

A.

Show route-table

B.

Show router routing-table

C.

Show router route-table

D.

Show static

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Question # 43

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

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.

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Question # 44

Click the exhibit.

4A0-C04 question answer

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?

A.

R1-R3-R8

B.

R1-R2-R4-R8

C.

R1-R3-R4-R8

D.

R1-R2-R4-R3-R8

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