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4A0-102 Nokia Border Gateway Protocol Questions and Answers

Questions 4

Click the exhibit.

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.

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Questions 5

Router R1, in AS 65540, has the export policy shown below. It advertises an aggregate route to eBGP peer router R2 in 65550. What is the AS Path of the aggregate route received by router R2?

Options:

A.

65540

B.

65540 1

C.

65540 65540

D.

65550 65540

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Questions 6

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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Questions 7

Which of the following behaviors regarding the modification of BGP attributes within a confederation is TRUE?

Options:

A.

Next Hop is modified when crossing member AS boundaries within a confederation.

B.

Origin Code is modified when crossing member AS boundaries within a confederation.

C.

AS Path is modified when crossing member AS boundaries within a confederation.

D.

None of the well known mandatory attributes is modified within a confederation.

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Questions 8

Which of the following parameters does NOT have to match for an iBGP session to be successfully established?

Options:

A.

BGP version number.

B.

The local AS number.

C.

The Hold Time.

D.

Authentication.

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Questions 9

Which of the following statements regarding BGP route selection is TRUE?

Options:

A.

Lower local preference is preferred over higher local preference.

B.

Higher MED is preferred over lower MED.

C.

Higher origin code is preferred over lower origin code.

D.

Lower BGP router ID is preferred over higher BGP router ID.

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Questions 10

Click the exhibit.

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

Options:

A.

Two primary paths and one backup path.

B.

One primary path and two backup paths.

C.

Three primary path and one backup path,

D.

Three primary paths.

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Questions 11

Click the exhibit.

AS 65550 owns CIDR block 10.64.0.0/12. Router R6 advertises the aggregate 10.64.0.0/12 to AS 65541 with "as-set" enabled. Which of the following is TRUE regarding the aggregate route received by router R7?

Options:

A.

The AS Path is set to 65540, and the Atomic Aggregate flag is set.

B.

The AS Path is set to 65540 65550, and the Atomic Aggregate flag is set.

C.

The AS Path is set to 65540 65550, and the Atomic Aggregate flag is not set.

D.

The AS Path is set to 65550, and the Atomic Aggregate flag is not set.

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Questions 12

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

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Questions 13

Which of the following statements regarding BGP shortcuts is FALSE?

Options:

A.

MPLS tunnels are used to carry transit traffic across the network.

B.

A full mesh of iBGP peering sessions is not required,

C.

Edge and transit routers need to be configured with BGP.

D.

The transit routers need to support LDP or RSVP-TE LSPs.

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Questions 14

Click the exhibit.

AS 65550 owns CIDR block 10.64.0.0/12. Router R3 is advertising Client1 and Client2 networks into BGP. Router R6 advertises the aggregate 10.64.0.0/12 to AS 65541 with "summary-only" enabled. Which of the following routes are received by router R7?

Options:

A.

Client1, Client2 and the aggregate.

B.

Only the aggregate.

C.

Only Client1 and the aggregate.

D.

Only Client2 and the aggregate.

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Questions 15

What is the result of configuring the following policy statement as a BGP import policy on the Alcatel-Lucent 7750 SR?

Options:

A.

All BGP routes are accepted.

B.

All routes matching prefix lists "List-1" and "List-2" are rejected.

C.

BGP routes matching prefix lists "List-1" or "List-2" are rejected.

D.

BGP routes matching prefix lists "List-1" and "List-2" are rejected.

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Questions 16

Which of the following prefix lists include prefixes 192.168.128.0/17 and 192.168.64.0/18?

Options:

A.

Prefix list 192.168.0.0/16 through 18.

B.

Prefix 192.168.0.0/17 longer.

C.

Prefix list 192.168.0.0/17 through 18.

D.

Prefix 192.160.0.0/13 longer.

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Questions 17

Click the exhibit.

Given the following configuration for router R1, what is the expected Next Hop for prefix 192.168.1.0/27 as seen on router R2?

Options:

A.

10.0.2.1

B.

10.0.2.2

C.

10.16.10.1

D.

10.16.10.3

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Questions 18

What kind of BGP attribute is the Local Preference?

Options:

A.

Optional transitive attribute.

B.

Optional non-transitive attribute.

C.

Well-known mandatory attribute.

D.

Well-known discretionary attribute.

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Questions 19

Which of the following best describes the relationship between locally configured policies and the direction of traffic?

Options:

A.

Import policies affect the way the local AS receives traffic, while export policies affect the way it sends traffic.

B.

Import policies affect the way the local AS sends traffic, while export policies affect the way it receives traffic.

C.

Both import and export policies affect the way the local AS receives traffic, but not the way it sends traffic.

D.

Both import and export policies affect the way the local AS sends traffic, but not the way it receives traffic.

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Questions 20

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

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Questions 21

Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.

Assuming that router R6 is configured with "advertise-external", what is the expected output of "show router bgp routes" when executed on router R1?

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Questions 22

Which of the following statements about an autonomous system is FALSE?

Options:

A.

An AS is a set of routers under a single technical administration.

B.

An AS efficiently advertises all IGP known routes to other ASs.

C.

An AS presents a consistent routing policy to other autonomous systems.

D.

An AS has a 2-byte or 4-byte AS number assigned.

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Exam Code: 4A0-102
Exam Name: Nokia Border Gateway Protocol
Last Update: Dec 4, 2024
Questions: 152
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