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4A0-101 Sample Questions Answers

Questions 4

Click the exhibit button.

Which of the following would correctly configure routers R2, R3, and R4?

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Questions 5

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.

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Questions 6

Click on the exhibit.

Given the contents of the LSPs from routers R1 and R2, which of the following is TRUE?

Options:

A.

Router R1 summarizes the prefixes from router R3 as 192.168.0.0/16 and router R2 does not summarize the prefixes.

B.

Router R1 does not summarize the prefixes from routers R3 and R2 summarizes them as 192.168.0.0/16.

C.

Router R1 summarizes the prefixes from router R3 as 192.168.0.0/20 and router R2 does not summarize the prefixes.

D.

Router R1 does not summarize the prefixes from routers R3 and R2 summarizes them as 192.168.0.0/20.

E.

Both routers R1 and R2 summarize the prefixes from R3 as 192.168.0.0/20.

F.

Neither router R1 nor router R2 summarizes the prefixes from router R3.

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Questions 7

Click on the exhibit.

The numbers beside the links are the metrics for that link.

Given the diagram, what path will traffic follow from router R1 to router R7, and from router R7 to router R1, if IS-IS is the routing protocol?

Options:

A.

Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to R1 will follow (R7-R6-R4-R2-R1)

B.

Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to R1 will follow (R7-R6-R5-R3-R1)

C.

Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to R1 will follow (R7-R6-R4-R2-R1)

D.

Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to R1 will follow (R7-R6-R5-R3-R1)

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Questions 8

Which of the following about the OSPF BDR is TRUE?

Options:

A.

A BDR is always required on point-to-point links.

B.

The second highest RID is always the BDR.

C.

The BDR only listens for link-state updates sent to 224.0.0.5.

D.

The BDR always acknowledges link-state updates from the DR

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Questions 9

Click the exhibit button.

Router 2 advertises the network 192.168.3.0/24 to router R1 via IS-IS.

How can router R1 ensure that it discards the route?

Options:

A.

Use a prefix list on router R1 to discard all ingress IS-IS routes.

B.

Use an export policy and prefix list on router R1.

C.

Use an import policy and a prefix list on router R1.

D.

This is not possible because IS-IS cannot use import policies.

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Questions 10

Refer to the exhibit below.

R1 distributes its loopbacks into IS-IS and globally routed addresses are configured as shown. How many routes will R4 have in its IPv6 route table?

Options:

A.

1

B.

2

C.

3

D.

4

E.

6

F.

7

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Questions 11

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

Options:

A.

Router LSA

B.

Network LSA

C Summary network LSA

C.

Summary router LSA

D.

Type 5 (AS external) LSAs

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Questions 12

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.

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Questions 13

What is the source IP address in an OSPF update?

Options:

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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Questions 14

What is the primary purpose of classless interdomain routing (CIDR)?

Options:

A.

To support classful routing protocols.

B.

To allow IP routes to be defined using any number of bits for the network portion of the address.

C.

To allow interdomain routing between an IGP and EGP such as OSPF and BGP.

D.

To simplify the allocation of IP address space by defining a fixed size for the network portion of the address for each of the address classes.

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Questions 15

Click the exhibit button. Assuming point-to-point links, which of the following statements is true?

Options:

A.

Routers R1 and R2 are L2 routers. Routers R3 and R4 are L1/L2 routers

B.

Routers R1, R2, and R4 are L1/L2 routers. Router R3 is an L1 router,

C.

Routers R1, R2, and R3 are L2 routers. Router R4 is an L1 router,

D.

Routers R1 and R2 are L1/L2 routers. Routers R3 and R4 are L1 routers

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Questions 16

Which of the following best describes the actions after an IS-IS router receives on a broadcast interface, a newer LSP than the one in its database?

Options:

A.

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

B.

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

C.

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

D.

The router updates its database with the LSP and acknowledges it with a PSNP.

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Questions 17

Which of the following TLV fields is included in an IS-IS Hello packet?

Options:

A.

Area addresses TLV

Intermediate system neighbors

TLV Authentication information TLV

B.

Intermediate system neighbors

TLV Area addresses

TLV LSP entries TLV

C.

The IP internal reachability information

TLV Area Addresses

TLV Authentication Information TLV

D.

The IP external reachability information

TLV Area addresses

TLV Intermediate system neighbors TLV

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Questions 18

Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. One of the routers is the DIS. How many adjacencies will be formed between them?

Options:

A.

None

B.

1

C.

2

D.

3

E.

4

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Questions 19

What are the types of networks supported on an Alcatel-Lucent 7750 SR for OSPF? (Choose 2)

Options:

A.

Broadcast

B.

Non-Broadcast Multi-Access

C.

Point-to-Point

D.

Point-to-Multipoint

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Questions 20

What causes an adjacency to change from "Init" to "Two Way"?

Options:

A.

When a Link State Update is received in response to a Link State Request

B.

When a router receives a Hello packet from a neighbor that contains its router id in the neighbor list

C.

When OSPF neighbors exchange Database Descriptor packets

D.

When a Link State Acknowledgement is received in response to a Link State Update

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Questions 21

What command allows analysis of the Dijkstra calculation on the Alcatel-Lucent 7750 SR?

Options:

A.

There is no such calculation in IS-IS

B.

Show router isis database

C.

Show router isis dijykstra

D.

Show router isis spf

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Questions 22

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.

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Questions 23

What command will show the OSPF neighbors, and their status on the Alcatel-Lucent 7750 SR?

Options:

A.

Show ospf neighbors

B.

Show router ospf neighbors

C.

Show router ospf adjacency

D.

Show ospf adjacency

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Questions 24

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

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Questions 25

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

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Questions 26

In an OSPF environment, what must a router receive after it sends out an update?

Options:

A.

The router must receive an acknowledgment

B.

The router must receive a Hello

C.

The router must receive a new sequence number

D.

The router must receive a Link State Packet

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Questions 27

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.

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Questions 28

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

Options:

A.

Type 1 Router LSA

B.

Type 2 Network LS A

C.

Type 3 Summary LSA

D.

Type 5 External LSA

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Questions 29

Click on the exhibit.

A service provider is deploying a 6 over 4 tunnel to connect a customer's corporate IPv6 network to all devices at the branch office as shown in the exhibit.

Which command is used to create the route to the branch office network on PE1?

Options:

A.

Configure router static-route 2001:DB8:1:201::/64 indirect 10.10.10.4

B.

Configure router static-route 2001:DB8:1:201:764 indirect 2001:DB8:1:200::2

C.

Configure router static-route 2001:DB8:1:200::/56 indirect 10.10.10.4

D.

Configure router static-route 2001:DB8:1:200:756 indirect 2001:DB8:1:200::2

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Questions 30

A static route needs to be configured with a next-hop that is NOT directly connected to the router. Which of the following must be TRUE?

Options:

A.

The router must also have an active static route to the next-hop specified in the static route command.

B.

The system address of the next-hop router must be included in the static route command.

C.

The command option "indirect" must be used in the static-route command.

D.

The system address of the router connected to the destination must be included in the static route command

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Questions 31

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.

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Questions 32

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, one point-to-point interface and one virtual link.

B.

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

C.

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

D.

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

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Questions 33

An Alcatel-Lucent 7750 SR has a port with the MAC address of 00;03:FA:AC:77: AF. The port is bound to an interface. If IPv6 is then enabled on that interface .what will the link-local address be?

Options:

A.

FE80::203:FAFF:FEAC:77AF/64

B.

2000::203:FAFFFEAC:77AF/64

C.

FE80::3FAFF:FEAC:77AF/64

D.

FC00::203:FAFF:FEAC:77AF/64

E.

FC00::3:FAFF:FEAC:77AF/64

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Questions 34

Click on the exhibit.

An OSPFv3 router is attached to a non-OSPF domain that includes networks 2001:DB8:8::/64.2001 .DB8:9::/64 and 2001 :DB8:A::/64. Other routers in the OSPF domain see the prefix 2001, DB8:8::/64, but not the other two prefixes.

What could cause this?

Options:

A.

The router is not configured as an asbr.

B.

The router is not configured as an NSSA.

C.

The export policy is not applied to OSPFv3.

D.

The prefix list should be 2001:DB8:8::/46

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Questions 35

Click on the exhibit.

What does the field "2001:DB8:111::/64" represent?

Options:

A.

The router's system address.

B.

The next-hop prefix.

C.

The interface's global prefix.

D.

The next-hop system address.

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Questions 36

Which of the following best describes an OSPF Type 3 LSA?

Options:

A.

A Type 3 LSA is generated by an ASBR only when route summarization is configured.

B.

A Type 3 LSA is generated by an ABR only when route summarization is configured.

C.

A Type 3 LSA is generated by an ASBR to describe routes to routers outside the area.

D.

A Type 3 LSA is generated by an ABR to describe routes to routers outside the area.

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Questions 37

Which OSPFv3 LSA type is generated by an ABR to advertise prefixes from one area to another?

Options:

A.

AS External

B.

Intra-Area Prefix

C.

Inter-Area Router

D.

Inter-Area Prefix

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Questions 38

Two IS-IS routers are exchanging Hello packets with different authentication types. Which of the following is TRUE?

Options:

A.

Different authentication types are not possible because IS-IS only supports password authentication.

B.

An adjacency will not be formed.

C.

The two routers negotiate the authentication type and then reach the up state.

D.

Only an L2 adjacency will form, as long as both routers are L2 capable.

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Questions 39

Which of the following is a valid IPv6 address equivalent to 2001:0da8:0000:0000:0024:0000:4ab9:0300?

Options:

A.

2001:0da8:::0024:0000:4ab9:03

B.

2001:0da8::0024::4ab9:0300

C.

2001:da8::24::4ab9:300

D.

2001:da8::24:0:4ab9:300

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Questions 40

Which of the following describes the purpose of 6over4 tunneling?

Options:

A.

To give IPv6 traffic preferential routing over IPv4 routes.

B.

To allow core routers running only IPv6 protocols to carry IPv4 traffic.

C.

To give IPv4 only routers the ability to route based on IPv6 addresses.

D.

To allow IPv6 traffic to pass through an IPv4 network.

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Questions 41

Click on the exhibit.

192.168.3.1 is a loopback interface on router R2 and is distributed to OSPF area 0, but the ping fails from router R3.

Which of the following is a possible solution to the problem?

Options:

A.

Add the "originate-default-route" option in the NSSA area configuration on router R3.

B.

Add the "summaries" option to the NSSA area configuration on router R1.

C.

Configure a static route on router R1 to 192.168.3.1.

D.

Configure a default route on router R2.

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Questions 42

What is the term used for the updates sent by IS-IS?

Options:

A.

Link State PDUs

B.

Link State Updates

C.

Link State Advertisements

D.

Intermediate System Update Packets

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Questions 43

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

Options:

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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Questions 44

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 Alcatel-Lucent 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 Alcatel-Lucent 7750 SR.

E.

traceroute 10.1.2.1

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Questions 45

Click the exhibit button.

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

Options:

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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Questions 46

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

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Questions 47

When are virtual links used in OSPF?

Options:

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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Exam Code: 4A0-101
Exam Name: Alcatel-Lucent Interior Routing Protocols and High Availability
Last Update: Apr 23, 2024
Questions: 315
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