4A0-C02 実際試験問題と解答 - 模擬練習 - 受験自信を増やす

Question No : 1
Click the exhibit.

Routers RR1 are RR2 are redundant route reflectors for clients R3 and R4.
Which of the following is a valid configuration on router R3?

A.Option A
B.Option B
C.Option C
D.Option D

正解:

Question No : 2
Which of the following regarding BGP Path Identifier is FALSE?

A.Path-ID is a four-octet identifier pre-pended to the NLRI field of a BGP update.
B.Path-ID is an optional transitive attribute used to advertise multiple paths.
C.Path-ID uniquely identifies each path advertised to a neighbor.
D.A BGP speaker that re-advertises a route must generate its own Path-I

正解:

Question No : 3
Which of the following prefix-lists is the most specific match for prefixes 192.168.64.1/20 and 192.168.32.5/19?

A.Prefix 192.168.0.0/17 longer.
B.Prefix 192.168.0.0/19 longer.
C.Prefix 192.168.96.0/19 longer.
D.Prefix 192.168.0.0/18 longer.

正解:

Question No : 4
Click the exhibit.

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 ISP 1 and the other ISPs?

A.ISP 1 has a peering relationship with ISP 2 and ISP 4.
B.ISP 1 has a peering relationship with ISP 2 and a transit relationship with ISP 3.
C.ISP 1 has a peering relationship with ISP 2 and ISP 3.
D.ISP 1 has a transit relationship with ISP 2 and ISP 4.
E.ISP 1 has a transit relationship with ISP 2 and a peering relationship with ISP 3.

正解:

Question No : 5
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?

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.

正解:

Question No : 6
Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

A."client2" routes will be only tagged with communities 'East'' and "South".
B."client2" routes will be tagged with community "East".
C."client2" routes will only be tagged with community "South".
D."client2" routes will be rejected.

正解:

Question No : 7
The user of an Alcatel-Lucent 7750 SR wants to see the effect of changing an import policy immediately.
What is the best command to force re-evaluation of the import policy with minimal impact?

A.Configure router bgp shutdown
B.Clear router bgp neighbor <ip-address> soft
C.Clear router bgp neighbor <ip-address> soft-inbound
D.Clear router bgp protocol

正解:

Question No : 8
Click the exhibit.

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

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.

正解:

Question No : 9
Which of the following statements regarding route reflectors is TRUE?

A.Route reflectors propagate BGP learned routes to their clients.
B.Route reflectors require "n" iBGP sessions, where "n" is the number of BGP routers in the A
C.Route reflectors disable iBGP split horizon for all iBGP peers in the A
D.Route reflectors do not work in conjunction with confederations.

正解:

Question No : 10
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?

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.

正解:

Question No : 11
The following policies are configured and exported using "export "Policy-1" "Policy-2"".

Assuming both "Client-1" and "Client-2" are properly defined on the router, which routes are advertised?

A.Client-1 routes only.
B.Client-2 routes only.
C.Client-1 and Client-2 routes.
D.Neither Client-1 nor Client-2 routes.

正解:

Question No : 12
What is the purpose of configuring a triggered-policy on an Alcatel-Lucent 7750 SR?

A.Policy changes are delayed until the peer router with the affected routes reboots.
B.Policy changes are delayed until route updates for affected BGP routes are received from peers.
C.Policy changes are delayed until BGP sessions are cleared or BGP is reset.
D.Policy changes are delayed until the router reboots.

正解:

Question No : 13
An Alcatel-Lucent 7750 SR receives a route from an iBGP peer with a MED value of 500.
What MED value is sent to eBGP peers?

A.100
B.The IGP cost
C.500
D.None

正解:

Question No : 14
Why is a full mesh of iBGP peers required?

A.To ensure proper route propagation inside a transit A
B.To ensure that all routers are directly connected.
C.To ensure that all routers run iBGP inside a transit A
D.To maximize control plane scalability.

正解:

Question No : 15
Which of the following regarding the TTL of a BGP message is TRUE?

A.TTL is a well-known mandatory BGP attribute.
B.The default TTL value of an eBGP message is 1, and 64 for an iBGP message.
C.The default TTL value of an iBGP message can be modified using the multihop command.
D.The default TTL value of an eBGP message can be modified using the "ttl-security" command.

正解:

Nokia 4A0-C02 問題練習