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4A0-C04 Nokia NRS II Composite Exam: OSPF version Question and Answers

Question # 4

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

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.

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Question # 5

Which of the following about the Isp-ping command on the Nokia 7750 SR is FALSE?

A.

An echo request is sent based on the LSP's label stack.

B.

Echo reply packets may not take the same path as the LSP.

C.

The IP destination address is used to initiate echo requests,

D.

The test fails if the LSP is not operationally up.

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Question # 6

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 # 7

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.

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Question # 8

Click the exhibit button.

Given the topology and the show commands, and assuming that router R2 advertises all of its loopbacks into OSPF, what is the correct router R1 configuration?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 9

Click on the exhibit.

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?

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.

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Question # 10

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 # 11

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

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.

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Question # 12

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 # 13

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.

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Question # 14

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 router R6 is configured with "advertise-external", what is the expected output of "show router bgp routes" when executed on router R1?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 15

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 # 16

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 # 17

Static routing will be used in a network between a corporate head office, with many connected networks, and a branch office, with one connection to the head office. Which of the following best describes the likely configuration?

A.

The corporate head office router will have a default route and the branch site will have a more specific static route.

B.

The corporate head office router and the branch office router will both have specific static routes.

C.

The corporate head office router and the branch router will both have default routes.

D.

The corporate head office router will have a more specific static route and the branch office router will have a default route.

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Question # 18

Which of the following about SAPs is FALSE?

A.

A SAP can be associated with more than one service.

B.

A SAP is the subscriber's point of entry to the service network.

C.

A SAP is created by specifying a physical port and an encapsulation type.

D.

A SAP can only be created on a port configured as "access".

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Question # 19

Which of the following about VPN labels is FALSE?

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.

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Question # 20

What best describes the type of packets used by OSPF routers to exchange updates on a pointto-point link?

A.

IP packets sent to an IP multicast address.

B.

Ethernet frames sent to an Ethernet multicast address.

C.

IP packets sent to an IP unicast address.

D.

UDP packets sent to an IP multicast address.

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Question # 21

An interface is configured on a router for OSPF but the command "show router ospf neighbor" does not show any neighbors. Which of the following is NOT a possible cause?

A.

An OSPF database description packet has not been received from the neighbor.

B.

The interface facing the neighbor is down.

C.

The interface is included in a different area than the neighbor router.

D.

The router has not received a valid OSPF Hello packet from its neighbor.

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Question # 22

Which of the following about ADSPEC is FALSE?

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.

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Question # 23

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 # 24

Click the exhibit button.

If router R2 redistributes the IS-IS route to 192.168.3.0/24 into OSPF, router R3 will receive two routes to 192.168.3.0/24. What will be the preference of these two routes? Assume that all IS-IS routers are L1/L2 capable and are in the same area. 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 # 25

Click the exhibit.

Which of the following statements about the E-pipe service is TRUE?

A.

The service is a local service.

B.

The service requires a second spoke SDP on this router.

C.

The service's VC ID is 44.

D.

The service will accept VLAN tag 100.

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Question # 26

Which of the following defines an FEC in traditional IP?

A.

A group of packets that will be forwarded by the router in the same manner, over the same path.

B.

A group of packets that arrive at the router on the same interface,

C.

A group of packets that leave the router on the same interface.

D.

A group of packets that arrive at the router on the same interface, from the same source.

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Question # 27

Which of the following statements apply to link state protocol behavior? Choose three answers.

A.

Routers broadcast the entire route table to all neighbors.

B.

Information about directly connected links is sent to all neighbors.

C.

An adjacency database is maintained by each router.

D.

The sequence number for an update is incremented as it is flooded from router to router.

E.

The topological database is the same for all routers in a single area.

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Question # 28

Which of the following statements regarding Internet Exchange Points is FALSE?

A.

They provide both peering and transit services.

B.

They provide services only to Tier 1 service providers.

C.

They can be either public or private.

D.

They provide services at the local, regional and continental levels.

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Question # 29

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 R1?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 30

Click the exhibit.

AS 65100 is advertising 192.168.1.0/27 into BGP. Which of the following AS Paths would the prefix 192.168.1.0/27 contain when viewed on router R7?

A.

65206 65202 65100

B.

(65206 65202)65100

C.

(65204 65206 65202) 65100

D.

(65200) 65100

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Question # 31

Click the exhibit.

This is output from router R4. Service 333 is a VPLS. Why does peer 10.10.10.1 not have an EgrLbl?

A.

The SDP to 10.10.10.1 on router R4 is shutdown.

B.

Router R4 has not sent a label to router R1 (10.10.10.1) yet.

C.

10.10.10.1 has a different service MTU set.

D.

10.10.10.1 has not sent a label to router R4 yet.

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Question # 32

When are virtual links used in OSPF?

A.

When two areas need to communicate and there is no area 0.

B.

When an area needs to traverse another area to reach area 0.

C.

When two areas are connected to area 0, but there is no direct path between them.

D.

When an area needs to connect directly to another area without using area 0.

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Question # 33

Click on the exhibit.

Which of the following is FALSE?

A.

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

B.

The router 10.10.10.2 is the egress router of the LSP.

C.

The router can reach the far-end of the LSP through an RSVP-TE tunnel.

D.

The router can reach the far-end of the LSP through an LDP tunnel.

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Question # 34

Which of the following about Type 10 opaque LSAs is TRUE?

A.

Type 10 opaque LSAs are supported by IS-IS.

B.

Type 10 opaque LSAs are flooded to all areas of the routing domain.

C.

Type 10 opaque LSAs are stored in an LSDB.

D.

Type 10 opaque LSAs are used for traffic engineering support.

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Question # 35

An LSP is configured with one-to-one FRR and node protection on a Nokia 7750 SR. Which of the following is FALSE?

A.

Each PLR signals a protection tunnel that avoids the downstream node.

B.

A single protection tunnel can protect all LSPs that go through the same hop.

C.

A link protection tunnel is signaled if a node protection tunnel cannot be established.

D.

Protection tunnels used in this LSP are also detour tunnels.

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Question # 36

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.

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Question # 37

Click the exhibit.

Given the following configuration for router R1, what is the expected Next Hop for prefix 192.168.1.0/27 as seen on router R2?

A.

10.0.2.1

B.

10.0.2.2

C.

10.16.10.1

D.

10.16.10.3

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Question # 38

Which of the following about Fast Reroute link protection tunnels is FALSE?

A.

Link protection tunnels are established if a router is unable to establish node protection tunnels.

B.

Link protection tunnels are only requested for a primary LSP path.

C.

Link protection tunnels can be created for both one-to-one or facility Fast Reroute.

D.

Link protection tunnels detour around a failed next downstream router.

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Question # 39

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 # 40

Click the exhibit.

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

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 41

Exhibit

Given the two configurations shown, identify the two incorrect statements below: (Choose two)

A.

Both routers will generate OSPF Hello packets.

B.

The system interface is missing in one configuration so OSPF will not operate correctly.

C.

The interface type settings differ, but OSPF will still operate correctly.

D.

Metric values differ, but this does not prevent OSPF operation.

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Question # 42

Click on the exhibit.

What is the possible reason that the label for prefix 192.10.1.2/32 is not active?

A.

The router does not have a route to reach to the peer 10.10.10.2/32.

B.

The router does not have a route to reach to the prefix 192.10.1.2/32.

C.

The router does not have an export policy defined to export the prefix 192.10.1.2/32 into LDP.

D.

The router receives an invalid label for the prefix 192.10.1.2/32 from its peer.

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Question # 43

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.

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