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4A0-113 Nokia OSPF Routing Protocol Exam Question and Answers

Question # 4

What is the metric and maximum routable value for RIP?

A.

Hop count and 16

B.

Hop count and 15

C.

Link cost and 15

D.

Link cost and 16

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Question # 5

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 # 6

What are the ways the RID can be created on a Nokia 7750 SR router? (Choose three)

A.

From the last 32 bits of the chassis MAC address

B.

From the first 32 bits of the chassis MAC address

C.

The loopback IP address

D.

By using the command "config router ospf router-id X.X.X.X"

E.

From the system IP address

F.

From the highest interface IP address

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Question # 7

Click the exhibit button.

The OSPF packets shown have been exchanged between two neighbors. What state is the OSPF adjacency in?

A.

The adjacency state is two way because both routers have received a database description packet.

B.

The adjacency is in the exchange state. The next step is to exchange link state request and link state update packets.

C.

The adjacency is in the ex start state. The routers have exchanged database description packets, but still have to negotiate the starting sequence number.

D.

The adjacency state is full. The routers are exchanging database description packets to notify each other that all link state advertisements have been received.

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Question # 8

Which of the following OSPF area types are supported by the Alcatel-Lucent 7750 SR? Choose two answers.

A.

Not so stubby areas

B.

Level1 area WC

C.

Stub areas

D.

Partially stubby areas

E.

Level 2 areas

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Question # 9

Click the exhibit button.

What is the command to configure a static route on the Nokia 7750 SR router R1 to reach the network behind router R2?

A.

configure router static-route 139.120.121.0/24 next-hop 138.120.199.2

B.

configure router static-route 139.120.121.0/24 next-hop 138.120.199.1

C.

configure router static-route 138.120.199.2/24 next-hop 138.120.199.1

D.

configure router static-route 139.120.121.0/24 next-hop 139.120.121.2

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Question # 10

If a Router originates a type 1 router LSA with the E bit set, what types of areas can it belong to? Select all that apply.

A.

Not So Stubby Area

B.

Stub Area

C.

Backbone Area

D.

Standard Area

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Question # 11

From the list below select the statements that describe the behavior of link state information aging. (Choose 2)

A.

The age for newly created link state information is set to 0 for OSPF and 1200 for IS-IS

B.

The age for newly created link state information is set to 1200 for OSPF and 0 for IS-IS

C.

The age is incremented or decremented as it is flooded from router to router and as it is held in the topological database.

D.

The age is incremented or decremented only as it is held in the topological database and not as it is flooded router to router.

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Question # 12

Which LSA type is not found in point-to-point only OSPF networks?

A.

Type 1 Router LSA

B.

Type 2 Network LSA

C.

Type 3 Summary LSA

D.

Type 5 External LSA

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Question # 13

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

A.

0

B.

5

C.

10

D.

15

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Question # 14

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

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

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Question # 15

What must be configured on the Nokia 7750 SR for RIP to advertise locally attached links?

A.

A policy statement within the router identifying what is to be advertised

B.

Access-lists denoting what is to be advertised

C.

Default metrics for each link

D.

A group and neighbor statement for each peer

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Question # 16

Click the exhibit button.

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 # 17

What are some of the characteristics of Nokia's implementation of non-stop routing? (Choose two)

A.

No protocol extensions required

B.

Only supported by OSPF and IS-IS

C.

Transparent to routing neighbors

D.

Uses Graceful Restart to inter-operate with other vendors

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Question # 18

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

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.

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Question # 19

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 # 20

What is the source IP address in an OSPF update?

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.

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Question # 21

An operator configures a 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 # 22

What best describes the type of packets used by OSPF routers to exchange updates on a point-to-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 # 23

What is the default priority value used for electing the DR on an Nokia 7750 SR running OSPF on an Ethernet?

A.

Priority of 0

B.

Priority of 1

C.

Priority of 64

D.

Priority of 255

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Question # 24

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.

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Question # 25

Which of the following OSPFv3 LSAs have an AS scope?

A.

Link Local LSA

B.

Router LSA

C.

Network LSA

D.

Inter-Area Router LSA

E.

Intra-Area Prefix LSA

F.

None of the above LSAs have an AS scope.

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Question # 26

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

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.

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Question # 27

The Nokia 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

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Question # 28

Click the exhibit button.

The OSPF adjacency between routers R3 and R1 is down. What is the problem?

A.

Area 1 of router R1 should not be configured as a stub.

B.

Router R3 has the incorrect authentication key type.

C.

Router R1 has the incorrect authentication key type.

D.

There is not enough information to tell.

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Question # 29

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 # 30

Click the exhibit button.

What triggers convergence of the routing protocol when the link between switch 1 and switch 2 goes down?

A.

Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of Hello timeouts. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

B.

Convergence is triggered when the physical interfaces between routers R1 and R2 go down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

C.

Convergence will not be triggered because switches cannot run routing protocols between them.

D.

Convergence is triggered when the switches notify the routers about the link state information. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

E.

Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

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Question # 31

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?

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.

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