4A0-106 Online Practice Questions and Answers

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.

An Alcatel-Lucent 7750 SR is to be configured as a core router that supports VPRNs using LDP as the transport protocol. Which of the following best describes this configuration?

A. This configuration is correct and complete.

B. This configuration is correct, but the interfaces must also be configured in the "configure router mpls" context.

C. There is no configuration required for LDP in the core network.

D. This configuration is correct but Targeted-LDP is also required.

Which of the following about BGP loops in a VPRN environment is TRUE?

A. Traditional BGP loop detection mechanisms are unable to detect a loop in a VPRN scenario.

B. BGP loops are detected in a VPRN when the customer has separate sites using the same BGP autonomous system number.

C. The Alcatel-Lucent 7750 SR rejects routes containing AS_PATH loops by default.

D. When "remove-private" is configured at a PE, all routes received from the associated CE will have private AS numbers removed.

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

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

D. CSC-CE2 pops the BGP label and pushes an LDP transport label.

Which of the following about the Route Target is TRUE?

A. The Route Target is added to an IPv4 route to create the VPN-IPv4 route.

B. The Route Target is an extended community string that identifies VPN membership.

C. A route can have only one Route Target.

D. The Route Target is a 64-bit value added to customer prefixes to make them unique.

Which of the following about the configuration of BGP Site of Origin (SoO) is TRUE?

A. Each PE must implement a policy to apply a unique SoO attribute to the set of routes received from each customer site.

B. A different BGP extended community is used on each PE that connects to a single site.

C. An import policy on the PE rejects a route if the attached SoO matches the configured value.

D. Import and export policies are applied on the PEs under the global BGP context.

Click the exhibit.

Which VPRN type produces the output shown on router R1?

A. A full mesh VPRN

B. A PE hub and spoke VPRN

C. An extranet VPRN

D. A CE hub and spoke VPRN

Which of the following about Carrier Supporting Carrier (CSC) VPRN is FALSE?

A. CSC does not allow a customer carrier to offer Layer 2 services to its end customers.

B. A CSC VPRN is configured on the network provider's CSC-PE routers.

C. CSC eliminates the need for customer carriers to build and maintain their own MPLS backbone.

D. The network provider provides an MPLS VPN backbone to the customer carrier.

Click the exhibit.

Internet access is provided to the Red VPRN (ID 10) via an Internet VRF (ID 500). For this configuration, which communities must be imported on the Red and Internet VRFs?

A. Red VRF imports only "Internet" Internet VRF imports only "Red-Only"

B. Red VRF imports "Internet" and "Red-Only" Internet VRF imports only "Red-Only"

C. Red VRF imports only "Red-Only" Internet VRF imports "Red-Only" and "Internet"

D. Red VRF imports "Internet" and "Red-Only" Internet VRF imports only "Internet"

Which of the following protocols are supported by the Alcatel-Lucent 7750 SR for the creation of transport tunnels within an autonomous system?

A. MP-BGP, LDP, RSVP-TE

B. LDP, RSVP-TE, GRE

C. MP-BGP, RSVP-TE, GRE

D. MP-BGP, LDP

E. MP-BGP only