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Nokia 4A0-102 Nokia Border Gateway Protocol Exam Practice Test

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Nokia Border Gateway Protocol Questions and Answers

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Question 1

What kind of attribute is the aggregator?

Options:

A.

Well-known mandatory

B.

Well-known discretionary

C.

Optional transitive

D.

Optional non-transitive

Question 2

Click the exhibit.

Over which BGP session will router B learn the 10.1.1.0/24 prefix?

Options:

A.

The session between router A and router B.

B.

The session between router C and router B.

C.

The session between router D and router B.

D.

Router B will learn the prefix over all of the sessions, then it will choose the best route.

Question 3

Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

Options:

A.

"client1" routes will be tagged with communities "North" and "West".

B.

"client1" routes will be tagged with community "West".

C.

"client1" routes will be tagged with community "North".

D.

"client1" routes will be rejected.

Question 4

What kind of BGP attribute is the Multi_Exit_Disc?

Options:

A.

Optional transitive attribute.

B.

Optional non-transitive attribute.

C.

Well-known mandatory attribute.

D.

Well-known discretionary attribute.

Question 5

Consider two Alcatel-Lucent 7750 SRs in AS 65540. Router R1 has system address 10.10.10.1, and router R2 has system address 10.10.10.2. Which of the following configurations on router R2 can establish a BGP session with router R1?

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 6

Click the exhibit.

Assume all router-IDs are properly configured, and link-local IPv6 addresses are used to establish the eBGP sessions. Which of the following is the MINIMAL configuration required on router A so that router B can exchange traffic with router D?

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 7

From what range are 16-bit private AS numbers selected?

Options:

A.

64496 – 64511

B.

1 – 56319

C.

64512-65534

D.

64513-65535

E.

There are no defined private AS numbers; there are only private IP addresses.

Question 8

Click the exhibit.

Router R3 is configured with an import policy to reject updates with an AS Path matching the regular expression ".+ 65540". Which of the following regarding updates originating in AS 65540 is TRUE?

Options:

A.

Router R3 rejects all updates originating in AS 65540.

B.

Router R3 accepts updates received from router R1 and rejects updates transited through router R2.

C.

Router R3 accepts updates transited through router R2 and rejects updates received from router R1.

D.

Router R3 accepts updates from both routers R1 and R2.

Question 9

Which of the following is FALSE regarding the 16-bit public autonomous system numbers?

Options:

A.

They are allocated to the RIRs by ICANN/IANA.

B.

They are used when connecting ASs on the Internet.

C.

They range from 1 to 56319.

D.

They are assigned by the ISPs for enterprise networks.

Question 10

Click the exhibit.

Router R6 is a route reflector with clients R1, R2, R4 and R5. Router R4 receives three routes from router R6 and is configured with ECMP 3. Given the following BGP configuration on routerR4, how many primary and backup paths will be present in router R4's BGP routing table?

Options:

A.

Three primary paths,

B.

Two primary paths and one backup path.

C.

One primary path and two backup paths.

D.

One primary path and one backup path.

Question 11

An Alcatel-Lucent 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 12

Click the exhibit.

Given the following configuration of router R1, what can be said about the function of each of AS 65540s routers?

Options:

A.

Routers R1 and R2 are redundant route reflectors with clients R3 and R4.

B.

Routers R3 and R4 are route reflectors with clients R1 and R2.

C.

Router R1 is a route reflector with clients R2, R3 and R4.

D.

Router R1 is a route reflector with clients R3 and R4.

Question 13

Click the exhibit.

Router R6 is a route reflector with clients R1, R2 and R5. Router R3 advertises the prefix 192.168.1.0/27 to routers R1, R2 and R5. How many routes for prefix 192.168.1.0/27 will router R6 receive?

Options:

A.

1

B.

2

C.

3

D.

None

Question 14

Which of the following regarding route reflectors is TRUE?

Options:

A.

Only the route reflector is configured with a cluster id.

B.

There can only be one route reflector in a cluster.

C.

Clients should have iBGP sessions with each other to maintain the mesh.

D.

There can only be one level of route reflectors in the topology.

Question 15

Click the exhibit.

Assume all router-IDs are properly configured, and global IPv6 addresses are used to establish eBGP sessions. Which of the following configurations is required on router A so that router B can exchange traffic with router D?

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 16

Click the exhibit.

Which of the following statements best describes the BGP sessions within the given network?

Options:

A.

The session between AS 65202 and AS 65206 is an iBGP session.

B.

The session between AS 65204 and AS 65206 is an intra-confederation eBGP session.

C.

A BGP session is required between AS 65202 and AS 65204.

D.

The BGP sessions within the member ASs are known as inter-confederation BGP sessions.

Question 17

Click the exhibit.

Which of the following can be used by router R4 in AS 65542 to reject all routes originating in AS 65540?

Options:

A.

An import policy that rejects updates with an AS Path matching the regular expression ".+ 65540 .+".

B.

An import policy that rejects updates with an AS Path matching the regular expression ".+ 65540".

C.

An import policy that rejects updates with an AS Path matching the regular expression "65540 .+".

D.

An import policy that rejects updates with an AS Path matching the regular expression "65540".

Question 18

Click the exhibit.

Assuming a full iBGP mesh in ISP 1, how does router R1 in ISP 1 handle a BGP update received from ISP 2?

Options:

A.

The update is sent to router R2 in ISP 1.

B.

The update is sent to routers R2 and R3 in ISP 1.

C.

The update is sent to all routers in ISP 1.

D.

The update is sent to routers R2 and R3 in ISP 1, and to router R3 in ISP 2.

Question 19

Which regular expression will match the AS Path of a route originating in remote AS 65100?

Options:

A.

".+ 65100"

B.

"65100.+"

C.

".* 65100.*"

D.

"65100"

Question 20

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 21

Click the exhibit.

If router A originates a BGP route for prefix 192.168.0.1/27, what will the update contain when it reaches router B?

Options:

A.

AS Path of 65200, Next Hop of router A, Origin of IGP.

B.

AS Path of 65200, Next Hop of router A, Origin of incomplete.

C.

Null AS Path, Next Hop of router A, Origin of IGP.

D.

Null AS Path, Next Hop of router A, Origin of incomplete.

Question 22

A router receives two routes from its neighbors: a route from OSPF for 10.0.0.0/24, and a route from BGP for 10.0.0.0/8. Both routes have reachable next hops. Which of the following is TRUE?

Options:

A.

Only the BGP route is in the route table.

B.

Both routes are in the route table.

C.

None of the routes is in the route table.

D.

Only the OSPF route is in the route table.

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