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Nokia 4A0-101 Nokia Interior Routing Protocols Exam Practice Test

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Nokia Interior Routing Protocols Questions and Answers

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Question 1

Click on the exhibit.

Given the output shown, which router is the ASBR in this network?

Options:

A.

10.10.10.2

B.

10.10.10.3

C.

10.10.10.4

D.

10.10.10.6

E.

There is no ASBR configured in the network.

Question 2

Which of the following about Type 4 LSAs is FALSE?

Options:

A.

A Type 4 LSA is not generated in a single area AS.

B.

A Type 4 LSA is generated by the ABRs of the area that contains the ASBR.

C.

A Type 4 LSA advertises the external networks connected to the ASBR.

D.

A Type 4 LSA is not flooded in the area that contains the ASBR.

Question 3

An Alcatel-Lucent 7750 SR is configured with an export policy to redistribute a loopback prefix into OSPFv3.

What type of LSA advertises the prefix to the other OSPFv3 routers in the same area?

Options:

A.

Router LSA

B.

AS External LSA

C.

Intra-Area Prefix LSA

D.

Inter-Area Prefix LSA

E.

Network LSA

Question 4

Click on the exhibit.

OSPF is operational on all links in the network diagram, all links have the same cost and all routers are configured with an ECMP value of 4. Router R4 advertises the prefix 192.168.3.0/24 into OSPF.

How many entries for prefix 192.168.3.0/24 will be l n router R1's routing table?

Options:

A.

0

B.

1

C.

2

D.

3

E.

4

Question 5

An IS-IS router receives a CSNP that references an older LSP than the one in its database. What action is taken?

Options:

A.

The router sends a copy of the LSP from its database to its neighbor.

B.

The router sends a PSNP to its neighbor describing the LSP in its database.

C.

The router updates its database with the LSP and floods a copy to its other neighbors.

D.

The router sends a PSNP to its neighbor to request the LSP.

Question 6

Click on the exhibit.

Router R2 uses OSPF to advertise the network 192.168.3.0/24 to router R1. A route policy has been configured to reject the route on router R1.

Why doesn't the route policy work?

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 was not "committed" after creation.

D.

Router R1 cannot reject the route because OSPF does not support import policies

Question 7

Which type of OSPF LSA lists the routers attached to a broadcast network?

Options:

A.

Type 1

B.

Type 2

C.

Type 3

D.

Type 4

E.

Type 5

Question 8

What is the primary purpose of variable length subnet masks (VLSM)?

Options:

A.

To reduce the size of each routing update.

B.

To allow interoperability between routing protocols.

C.

To allow different subnet masks for different subnets.

D.

To reduce the size of the routing table.

Question 9

Which of the following route types must be manually configured and will not re-route traffic when a link failure occurs in its path?

Options:

A.

A route from IS-IS.

B.

A route from OSPF.

C.

A floating static route.

D.

A static route.

Question 10

Click on the exhibit.

A static route has been configured on router R1 to reach the PC at 139.120.121.2. What might be causing the ping to fail?

Options:

A.

Router R2 needs a static route to the PC.

B.

Router R2 needs a default to router R1.

C.

Router R1 needs a default route to router R2.

D.

The static route should use a next-hop of 172.31.1.2

Question 11

Click the exhibit button.

Assuming that the router ID of the router shown is 10.10.10.4, which of the following statements regarding the CLI output is true?

Options:

A.

The router with router ID 10.10.10.5 is an ASBR.

B.

The router with router ID 10.10.10.3 is an ASBR.

C.

The router with router ID 10.10.10.5 originated the AS summary LSA in its own area.

D.

The router with router ID 10.10.10.4 is in the same area as the router with router ID 10.10.10.5.

Question 12

If routers R1 and R2 have a Level 1 and Level 2 IS-IS adjacency, which of the following statements are true? Choose two answers.

Options:

A.

Routers R1 and R2 are in different areas,

B.

Routers R1 and R2 are in the same area.

C.

Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is point-to-point.

D.

Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between them is broadcast.

E.

Routers R1 and R2 will send a Level 1/2 Hello PDU, if the interface type between them is broadcast.

Question 13

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?

Options:

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.

Question 14

Click the exhibit button.

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

Options:

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

Question 15

Which of the following TLV fields is included in an IS-IS Hello packet on broadcast interfaces but not on point-to-point interfaces?

Options:

A.

The area addresses TLV

B.

The intermediate system neighbors TLV

C.

The IP interface address TLV

D.

The authentication information TLV

Question 16

A router sets the E bit in the flags of its Type 1 LSA. What does this indicate?

Options:

A.

The router is an ABR.

B.

The router is an ASBR.

C.

The router is at the end of a virtual link.

D.

The router's interface is in a stub area.

Question 17

Which three IS-IS PDU types are used for database synchronization?

Options:

A.

Hellos, CSNPs, PSNPs

B.

LSPs. Hellos, CSNPs

C.

LSPs, PSNPs, Hellos

D.

LSPs, CSNPs, PSNPs

Question 18

On which type of IS-IS router is summarization most likely to be configured?

Options:

A.

L1 routers

B.

L2 routers

C.

L1/L2 routers

D.

L1 and L2 routers

Question 19

Which one of the following is a valid IPv6 multicast address?

Options:

A.

ff00::1:2

B.

fe80::216:4dff:fe13:5cae

C.

::ffff:0:0.240.0.0.1

D.

2001:db8::30a:216:4dff:fe13:5cae

E.

fd01:2234:5678::1

Question 20

Click the exhibit button.

A static route is created on router R1 using the command "static-route 0.0.0.0/0 next-hop 10.3.3.2". What command can be used to test the static route on an Alcatel-Lucent 7750 SR?

Options:

A.

ping static 10.5.5.5

B.

ping static 0.0.0.0/0

C.

ping 10.5.5.5

D.

ping 0.0.0.0

Question 21

Which of the following types of network topologies are supported by IS-IS on the Alcatel-Lucent 7750 SR? Choose two answers.

Options:

A.

Non-broadcast

B.

Broadcast

C.

Point-to-multipoint

D.

Point-to-point

Question 22

In which of the following types of areas does an OSPF router not set the E bit in its Type 1 LSA?

Options:

A.

Not so stubby area

B.

Stub area

C.

Backbone area

D.

Normal area

Question 23

Which of the following statements regarding IS-IS LSPs is true?

Options:

A.

There are three types of LSPs: L1, L2 and L1/L2.

B.

An LSP packet contains the ATT bits and the IS-type bits.

C.

The lower the LSP sequence number, the more current the update.

D.

Separate databases are maintained for L1 „ L2, and L1/L2 LSPs.

Question 24

Click the exhibit button.

Given the diagram below, what path will traffic follow from router R6 to router R3, and from router R3 to router R6, if IS-IS is the routing protocol? The numbers beside the links are the metrics for that link.

Options:

A.

Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3- R2-R5-R6).

B.

Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R2-R5-R6).

C.

Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R7-R5-R6).

D.

Router R6 to router R3 will follow (R6-R5-R7-R4-R3). Router R3 to router R6 will follow (R3-R4-R7-R5-R6).

Question 25

What is the protocol number for OSPF in the IP header?

Options:

A.

OSPF uses TCP, so the protocol number is 6.

B.

OSPF uses UDP, so the protocol number is 17.

C.

OSPF does not use IP.

D.

OSPF has its own protocol number of 89.

Question 26

How are IS-IS LSPs sent on point-to-point links?

Options:

A.

They are sent using multicast MAC addresses 0180:0200:0014.

B.

They are sent using multicast MAC addresses 0180:c200:0015.

C.

They are sent using a unicast address.

D.

None of the above.

Question 27

In IS-IS, which of the following statements regarding an L1/L2 router is false?

Options:

A.

An L1/L2 router can have neighbors in different areas.

B.

An L1/L2 router calculates separate SPF trees for the Level 1 and Level 2 topology.

C.

An L1/L2 router advertises its L2 routes to its L1 neighbors.

D.

An L1/L2 router sets the ATT bit in L1 LSPs to identify itself as an L1 router.

Question 28

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.

Question 29

Which type of IS-IS router is summarization most likely to be configured on?

Options:

A.

L1 routers

B.

L2 routers

C.

L1/L2 routers

D.

L1 and L2 routers

Question 30

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?

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 31

Which of the following statements regarding the election of the designated router (DR) by OSPF routers are true? (Choose two)

Options:

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.

Question 32

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

Options:

A.

Priority of 0

B.

Priority of 1

C.

Priority of 64

D.

Priority of 255

Question 33

What is the default preference value for a static route in the Alcatel-Lucent 7750 SR router?

Options:

A.

0

B.

5

C.

10

D.

15

Question 34

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

A OSPF Hello has not been received from the neighbor

Question 35

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 36

Which of the statements below best describes the pseudonode in an IS-IS network?

Options:

A.

The DIS creates a logical node to represent a group of routers on the same non-broadcast network; this node is the pseudonode

B.

The DIS creates a logical node to represent the topological database of the backbone network in an IS-IS network; this node is the pseudonode

C.

The DIS creates a logical node to represent a broadcast sub-network; this node is the pseudonode

D.

The DIS creates a logical node to represent the complete topology of an IS-IS area; this node is the pseudode

Question 37

Exhibit

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

Options:

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.

Question 38

Which of the following best describes how IS-IS routers exchange updates on an Ethernet interface?

Options:

A.

IS-IS routers exchange updates by sending UDP packets to a multicast address.

B.

IS-IS routers exchange updates using IP multicast packets.

C.

IS-IS routers exchange updates using Ethernet multicast packets.

D.

IS-IS routers exchange updates by sending packets to the subnet broadcast address.

Question 39

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.

Question 40

What is the default inbound metric for RIP on the Alcatel-Lucent 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 41

Click on the exhibit.

Given the contents of the Router LSA, which of the following best describes the local topology of the router?

Options:

A.

The router has a system interface, two point-to-point interfaces and one broadcast interface.

B.

The router has a system interface, two passive interfaces, two point-to-point interfaces and one broadcast interface.

C.

The router has a system interface, two point-to-point interfaces and one virtual link.

D.

The router has a system interface, two passive interfaces, two point-to-point interfaces and one virtual link.

Question 42

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 43

Click on the exhibit.

Router R4 is being added to the network and it is connected to a non-OSPF domain.

Which area type should be used for Area 1 to allow the external routes to be advertised into Area 0?

Options:

A.

Backbone

B.

NSSA

C.

Stub

D.

Totally stubby

Question 44

When a router performs the SPF calculation, which router is used as the root of the shortest path tree?

Options:

A.

The router with the least number of links.

B.

The router with the lowest router ID.

C.

The router's closest neighbor.

D.

The router doing the calculation.

Question 45

Click on the exhibit.

A static route has been configured on router R1 to reach the PC at 139.120.121.2. What might be causing the ping to fail?

Options:

A.

Router R2 needs a static route to the PC.

B.

Router R2 needs a default to router R1.

C.

Router R1 needs a default route to router R2.

D.

The static route should use a next-hop of 172.31.1.2

Question 46

Click on the exhibit.

The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. An operator successfully configures multi-topology IS-IS routing so that the IPv6 system addresses are also exchanged between routers.

After IPv6 has been configured, which of the following is TRUE?

Options:

A.

Router R2 has two IS-IS adjacencies and two LSPs

B.

Router R2 has two IS-IS adjacencies and three LSPs

C.

Router R2 has two IS-IS adjacencies and four LSPs

D.

Router R2 has three IS-IS adjacencies and three LSPs

E.

Router R2 has three IS-IS adjacencies and four LSPs

F.

Router R2 has three IS-IS adjacencies and six LSPs

Question 47

Click on the exhibit.

Examine the physical topology of the IS-IS network, the metrics of the links and the levels of the routers. All routers have a system address included in IS-IS.

Which of the following describes the route that router R4 will use to reach the system address of router R6?

Options:

A.

Router R4 will have a route to router R6's system address with router R2 as the next-hop.

B.

Router R4 will have a default route with router R2 as the next-hop.

C.

Router R4 will have a default route with router R3 as the next-hop.

D.

Router R4 will not have a route that can be used to reach the system address of router R6.

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