4A0-106 Online Practice Questions and Answers

When configuring the CE with the selected CE-PE routing protocol on an Alcatel-Lucent 7750 SR, which of the following statements is true? (Choose three.)

A. The protocol is configured under the config>service context

B. The protocol is configured under the global router context

C. The interface leading to the PE is defined as a protocol neighbor

D. The routing protocol used must be the same as the routing protocol used at other CE-PE locations in the same VPN.

E. A routing policy may or may not be required depending on the routing requirements and routing

protocol

When an Alcatel-Lucent 7750 SR receives a BGP update containing an AS-Path loop, what is the default action?

A. The update is accepted and the route installed in the route table.

B. The update is accepted but the route will not be installed in the route table

C. The update is rejected

D. The peer session is dropped

Which of the following about the maximum number of routes that can be accepted in a VRF for a VPRN service on the Alcatel-Lucent 7750 SR is FALSE?

A. The Alcatel-Lucent 7750 SR allows the setting of the maximum number of routes that can be accepted in a VRF for a VPRN service.

B. The "maximum-routes" command is used to specify the maximum number of remote routes that can be held within a VRF for a VPRN service.

C. When the "maximum-routes" command is used with the "log-only" parameter, new routes are still learned.

D. Once the "threshold" value is reached, no new routes are added to the VRF.

Click the exhibit.

Which of the following best describes the output?

A. The AS-Path is not present because a policy is configured on PE2 to set it to null.

B. The AS-Path is not present because a policy is configured on CE1 to set it to null.

C. The AS-Path is not present because a policy is configured on PE1 to set it to null.

D. The AS-Path is not present because VPN-IPv4 routes do not propagate the IPv4 AS-Path BGP attribute.

Which of the following is not an available option for Route Distinguisher assignment?

A. One Route Distinguisher per VRF route

B. One Route Distinguisher per VRF

C. One Route Distinguisher per VRF per site

D. One Route Distinguisher per VPN

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet Service Provider (ISP). If CE1 sends an IP packet to 192.60.100.1, which of the following is FALSE?

A. PE1 pushes an LDP transport label.

B. CSC-CE1 pops the LDP label and pushes a BGP label.

C. CSC-PE1 pops the BGP label and pushes two labels: a VPN label and an MPLS transport label.

D. CSC-PE2 pops the MPLS label and pushes a BGP label.

Click the exhibit.

The AS-path nullification method is used to prevent CE2 from discarding routes received from CE1. On which router should the AS-path nullification policy be configured?

A. CE1

B. PE2

C. PE1

D. CE2

Click the exhibit.

AS-override is configured on PE1 to eliminate the BGP loops. What is the expected AS-Path in the VPNIPv4 route 64496:10:192.168.2.0/27 received by PE1?

A. 64496 64497

B. 64496

C. 64497

D. 64497 64497

Click the exhibit.

For the Inter-AS model B VPRN, which of the following about the inter-as-label output on ASBR1 is TRUE?

A. ASBR1 includes label 131069 in the route update sent to ASBR2.

B. ASBR1 includes label 131068 in the route update sent to ASBR2.

C. ASBR1 includes label 131068 in the route update sent to PE1.

D. ASBR1 includes labels 131068 and 131069 in the route update sent to ASBR2.

Which of the following statements about inter-AS model C VPRNs is FALSE?

A. VPN-IPv4 routes are neither held, nor re-advertised, by the ASBRs.

B. Each ASBR propagates the routes received from its neighbor ASBR as labeled IPv4 routes in its own AS.

C. ASBRs exchange labeled IPv4 routes for the system addresses of PE routers.

D. ASBRs exchange customer routes as labeled IPv4 routes.