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  4. 4A0-C04 - Nokia NRS II Composite Exam: OSPF version

Nokia 4A0-C04 Nokia NRS II Composite Exam: OSPF version Exam Practice Test

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Total 298 questions
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Nokia NRS II Composite Exam: OSPF version Questions and Answers

Question 1

Click on the exhibit.

Question # 1

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.

Question 2

Which of the following is TRUE when the explicit null is implemented?

Options:

A.

The penultimate router will forward packets to the eLER, based on the IP header.

B.

The eLER will receive packets with a top label value of 0.

C.

The eLER will receive packets with a top label value of 3.

D.

The penultimate router will pop the top label from the packets.

Question 3

What is the default inbound metric for RIP on the Nokia 7750 SR?

Options:

A.

Whatever the advertised metric happens to be.

B.

A value of 1.

C.

This must be administratively set as there is no default value.

D.

A value of 15.

Question 4

Which of the following about ADSPEC is FALSE?

Options:

A.

ADSPEC sets an SDP's MTU to the smallest MTU value found along the LSP path.

B.

RSVP must be enabled on all MPLS routers of a path to use ADSPEC.

C.

ADSPEC can automatically adjust the service MTU.

D.

ADSPEC can be enabled on individual LSPs.

Question 5

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

Options:

A.

0

B.

5

C.

10

D.

15

Question 6

If OSPF is used in a multi-area OSPF network, which of the following statements regarding route summarization is true?

Options:

A.

Manual route summarization can only be done on autonomous system border routers.

B.

Manual route summarization must be done on all the backbone routers to be effective. Manual route summarization is optional on the routers in non-backbone areas.

C.

Manual route summarization is done on the ABRs. By default, automatic summarization is done; however, it may not be optimal for all networks.

D.

Manual route summarization is done on the ABRs. By default, no route summarization is done and all routes are advertised to all areas.

Question 7

Which of the following about MPLS shortcuts for IGP on an Nokia 7750 SR is FALSE?

Options:

A.

An IGP route takes priority over a transport tunnel.

B.

Both LDP and RSVP-TE based tunnels can be used.

C.

MPLS tunnels can be used to resolve the prefixes learned via IGP.

D.

Multiple MPLS tunnels can be installed in the FIB.

Question 8

Click the exhibit.

Question # 8

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

Question # 8

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 9

Which of the following is NOT considered an option of export policies?

Options:

A.

Advertising customer networks into BGP.

B.

Sending aggregates that summarize the AS s address space.

C.

Sending MEDs to influence ingress traffic from peers.

D.

Preventing unwanted NLRI from entering the AS.

Question 10

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

Options:

A.

1

B.

3

C.

6

D.

12

Question 11

Which of the following correctly lists the 5 OSPF packet types?

Options:

A.

Hello, link state update, link state packet, link State acknowledgement, database description.

B.

Link state update, link state refresh, link state acknowledgement, database description, notification.

C.

Hello, link state refresh, link state update, link state acknowledgement, link state authentication.

D.

Hello, link state update, link state request, link state acknowledgement, database description.

Question 12

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?

Options:

A.

100

B.

The IGP cost

C.

500

D.

None

Question 13

What will happen if an update is received with an unrecognized optional non-transitive attribute?

Options:

A.

The router will accept the update and send a notification.

B.

The router will not accept the update and send a notification.

C.

The router will accept the update and ignore the attribute.

D.

The router will accept the update and propagate the attribute.

Question 14

Refer to the exhibit.

Question # 14

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?

Options:

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

Question 15

Click the exhibit.

Question # 15

Based on this output from PE router R1, how many other PEs are participating in the VPRN?

Options:

A.

0

B.

1

C.

2

D.

3

Question 16

On Nokia 7750 SR OS, routing information between the CE and PE can be exchanged using the following methods.

Options:

A.

ISIS, RIP, OSPF, static routes

B.

BGP, ISIS, RIP, OSPF, static routes

C.

BGP, RIP, OSPF, static routes, OSPF3

D.

ISIS, RIP, OSPF, static routes, OSPF3

Question 17

What is the function of the Cluster_List attribute?

Options:

A.

It is used for loop detection within the same cluster.

B.

It is used for loop detection between clusters.

C.

It is used for loop detection in a confederation.

D.

It is used to identify the route reflectors within an AS.

Question 18

Which of the following about label modes on the Nokia 7750 SR is FALSE?

Options:

A.

RSVP uses downstream on demand label distribution mode.

B.

LDP uses conservative label retention mode.

C.

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

D.

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

Question 19

Click the exhibit.

Question # 19

Assume all router-IDs are properly configured, and IPv6 link-local addresses are used to establish all eBGP sessions. Given the following iBGP configuration on router A, what is the Next Hop for prefix 2001:DB8:A:401::1/128 on router B?

Question # 19

Options:

A.

The IPv6 link-local address of the router D interface towards router A.

B.

The IPv6 link-local address of the router A interface towards router D.

C.

The IPv6 global address of router A.

D.

The IPv6 global address of router D.

Question 20

Which of the following about IS-IS Traffic Engineering on an Nokia 7750 SR is FALSE?

Options:

A.

Traffic engineering information is carried in the extended TLVs.

B.

Traffic engineering must be enabled on all IP/MPLS routers along the LSP path.

C.

Traffic engineering information is stored in the opaque database,

D.

Traffic engineering is required for constraint-based LSPs.

Question 21

Click on the exhibit.

Question # 21

An LDP tunnel is established on router R1 towards router R6. The link between routers R2 and R4 goes down. What will happen to the MPLS data traffic to router R6 IMMEDIATELY after the link goes down?

Options:

A.

MPLS data traffic will be discarded until the IGP finds a new next-hop to router R3.

B.

MPLS data traffic will be discarded unless the LDP tunnel has a standby secondary path.

C.

MPLS data traffic will not be discarded because router R1 received labels from both next-hops, routers R2 and R3.

D.

MPLS data traffic will not be discarded because of fast reroute capability on router R2.

Question 22

There is an IP host with IP address 10.2.3.1. A static route is created, using the "configure router static-route 10.2.3.0/24 next-hop 10.1.2.1" command. What is the correct traceroute command to test this static route on an Nokia 7750 SR?

Options:

A.

traceroute 10.2.3.1

B.

traceroute 10.2.3.1 next-hop 10.1.2.1

C.

traceroute next-hop 10.1.2.1

D.

traceroute does not work on the Nokia 7750 SR.

E.

traceroute 10.1.2.1

Question 23

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

Options:

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.

Question 24

Which of the following commands would correctly configure the confederation AS number as 65200 with a member AS of 65202?

Options:

A.

config>router- confederation 65200 members 65202

B.

config>router>bgp= confederation 65200 members 65202

C.

config>router= confederation 65202 members 65200

D.

config>router>bgp= confederation 65202 members 65200

Question 25

Click the exhibit.

Question # 25

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

Question 26

Which of the following about the components of a distributed service on the Nokia 7750 SR is TRUE?

Question # 26

Options:

A.

A SAP can only be used by one service on a router.

B.

A dedicated SDP needs to be created for each service.

C.

A service is created on each site before the customer is created.

D.

SAPs must be created before a service is created.

Question 27

Facility fast reroute with node protection is enabled for an LSP, which of the following is FALSE?

Options:

A.

Each PLR signals a bypass tunnel that avoids the next-hop downstream router.

B.

When a failure occurs, the PLR pushs an additional label onto the label stack.

C.

No bypass tunnel is established if the PLR cannot provide node protection.

D.

The head-end router sets the local protection desired flag in the session attribute object.

Question 28

Click the exhibit button.

Question # 28

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?

Options:

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.

Question 29

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 FIB.

C.

Selected labels from the LIB are populated to the FIB.

D.

Selected labels from the LIB are populated to the LFIB.

Question 30

Which of the following statements regarding OSPF routing updates on a multi-access network segment is true?

Options:

A.

In multi-access networks, a DR and BDR are elected only if there are more than two routers connected to the network segment.

B.

In multi-access networks, a DR and BDR are elected only if the subnet masks on the router interfaces are less than /30

C.

In multi-access networks, a DR and BDR are elected. To ensure resiliency, both the DR and BDR send link-state advertisements describing the network.

D.

In multi-access networks, a DR and BDR are elected. The DR sends link-state advertisements describing the network.

Question 31

A static route is created using the command "static-route 2.3.4.0/24 next-hop 1.2.3.4". What is the correct traceroute command to test this static route on an Nokia 7750 SR?

Options:

A.

traceroute 2.3.4.1

B.

traceroute 2.3.4.0/24 next-hop 1.2.3.4

C.

traceroute next-hop 1.2.3.4

D.

traceroute does not work on the Nokia 7750 SR

Question 32

Click the exhibit.

Question # 32

Routers RR1 are RR2 are redundant route reflectors for clients R3 and R4. Which of the following is a valid configuration on router RR1?

Question # 32

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 33

A VPLS has a service MTU of 1600. To create an IES spoke termination to the VPLS, what ip-mtu value must be used for the IES?

Options:

A.

1586

B.

1596

C.

1600

D.

1614

Question 34

How many databases does a Link State routing protocol use?

Options:

A.

One

B.

Two

C.

Three

D.

Four

Question 35

An Nokia 7750 SR is configured with an export policy to redistribute its directly-connected networks into BGP. Which of the following databases contains the routes for these networks?

Options:

A.

The routes are in the RIB-In.

B.

The routes are in the Loc-RIB.

C.

The routes are in the RIB-Out.

D.

The routes are not in any of the BGP databases.

Question 36

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

Question 37

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.

Question 38

Click the exhibit button.

Question # 38

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.

Question 39

Click the exhibit.

Question # 39

AS 65540 routers are iBGP fully-meshed. Assume routers R4, R5 and R6 are configured with addpaths ipv4 send 2 receive". Which routes to 192.168.0.1/27 is router R6 expected to have in its BGP routing table?

Options:

A.

Two routes from router R4.

B.

Two routes from router R5.

C.

Two routes; one from router R4 and one from router R5.

D.

Four routes; two from router R4 and two from router R5.

Question 40

In an OSPF Hello packet what fields must match all neighbor routers on the segment? (Choose 3)

Options:

A.

Area ID

B.

Hello and Dead Intervals

C.

Stub flag

D.

DR and BDR addresses

E.

The list of neighbors

Question 41

What happens by default on an Nokia 7750 SR when a VPLS accepts a tagged frame at the ingress SAP 1/1/1:100?

Options:

A.

The FCS is verified and kept in the customer frame. The VLAN tag is kept and transported over the network.

B.

The FCS is verified and kept in the customer frame. The VLAN tag is removed for transport over the network.

C.

The FCS is verified and removed from the frame. The VLAN tag is kept for transport over the network.

D.

The FCS is verified and removed from the frame. The VLAN tag is removed for transport over the network.

Question 42

How are policy direction and data flow related on the Nokia 7750 SR?

Options:

A.

Import policies affect ingress data flow.

B.

Export policies affect ingress data flow.

C.

Both import and export policies affect ingress data flow.

D.

Policy direction and data flow are independent.

Question 43

Click the exhibit.

Question # 43

Assuming that none of the routers within AS 65200 is configured with next-hop-self", what will the BGP update for the 192.168.0.1/27 prefix contain when it arrives at router B?

Options:

A.

AS Path of 65200 65100, Next Hop of router A.

B.

AS Path of 65200 65100, Next Hop of router E.

C.

AS Path of 65100, Next Hop of router E.

D.

AS Path of 65100, Next Hop of router A.

Question 44

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.

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