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4A0-102 Practice Exam Questions and Answers

Nokia Border Gateway Protocol

Last Update 4 days ago
Total Questions : 152

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Question # 1

Why is a full mesh of iBGP peers required?

Options:

A.  

To ensure proper route propagation inside a transit AS.

B.  

To ensure that all routers are directly connected.

C.  

To ensure that all routers run iBGP inside a transit AS.

D.  

To maximize control plane scalability.

Discussion 0
Question # 2

An Alcatel-Lucent 7750 SR receives two updates for the same route with local preferences 200 and 300, respectively. What local preference is sent to eBGP peers?

Options:

A.  

100

B.  

200

C.  

300

D.  

None

Discussion 0
Question # 3

BGP is configured on two peers, routers A and

B.  

Router A is configured with a Hold Time timer of 60 seconds and a Keepalive timer of 25 seconds. Router B is configured with a Hold Time timer of 90 seconds and a Keepalive timer of 70 seconds. What will the active Keepalive timer be on router B?

Options:

A.  

70 seconds

B.  

25 seconds

C.  

20 seconds

D.  

30 seconds

Discussion 0
Question # 4

Which of the following regarding BGP confederations is FALSE?

Options:

A.  

The entire confederation is viewed as a single AS by an eBGP peer.

B.  

Within a confederation, each member AS is considered as a stand-alone AS.

C.  

Member ASs within a confederation can use route reflection.

D.  

Member ASs must be fully meshed within a confederation.

Discussion 0
Question # 5

Which of the following is the minimum requirement for an AS to be considered multi-homed?

Options:

A.  

A single connection to a single service provider.

B.  

Two connections to a single service provider.

C.  

Two connections to two different service providers.

D.  

Multiple connections to different service providers.

Discussion 0
Question # 6

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

Options:

A.  

They are allocated to the RIRs by ICANN/IAN

A.  

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.

Discussion 0
Question # 7

Click the exhibit.

Question # 7

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 R8?

Options:

A.  

65200 (65206 65202) 65100

B.  

(65206 65202)65100

C.  

65250 (65206 65202) 65100

D.  

65200 65100

Discussion 0
Question # 8

Click the exhibit.

Question # 8

Router R6 is a route reflector for clients R1, R2 and R5 with local preferences 100, 200 and 500 respectively. Router R3 advertises prefix 192.168.1.0/27 to routers R1, R2 and R5 which are configured with advertise-external. Routers R4 and R6 are both configured with "add-paths ipv4 send 2 receive". Which routes to 192.168.0.1/27 is router R4 expected to have in its BGP routing table?

Options:

A.  

The routes from routers R1, R2 and R5.

B.  

The routes from routers R1and R2.

C.  

The routes from routers R2 and R5.

D.  

Two routes are chosen at random and advertised to router R4.

Discussion 0
Question # 9

Click the exhibit.

Question # 9

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

Options:

A.  

AS Path of 65200, local-preference of 100.

B.  

AS Path of 65200, local-preference of None.

C.  

Null AS Path, local-preference of 100.

D.  

Null AS Path, local-preference of None.

Discussion 0
Question # 10

Click the exhibit.

Question # 10

Given that ISP 1 and ISP 2 are Tier 2 providers, and that ISP 3 and ISP 4 are Tier 1 providers, what is the most likely relationship between the ISPs?

Options:

A.  

ISP 1 and ISP 2 have a public transit relationship, while ISP 3 and ISP 4 have a private transit relationship.

B.  

ISP 1 and ISP 2 have a private transit relationship, while ISP 3 and ISP 4 have a public transit relationship.

C.  

ISP 1 and ISP 2 have a private peering relationship, while ISP 3 and ISP 4 have a public peering relationship.

D.  

ISP 1 and ISP 2 have a public peering relationship, while ISP 3 and ISP 4 have a private peering relationship.

Discussion 0
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