4A0-106 Online Practice Questions and Answers

Which of the following devices would typically have VRF instances?

A. Any CE device

B. Any PE device

C. Any P device

D. Any router in the service provider core

E. Any customer router

When configuring BGP as the PE-CE protocol on an Alcatel-Lucent 7750 SR, the configuration on the CE is done under the ____________ context and the PE configuration is under the ____________ context.

A. Global, router

B. Router, router

C. Service, router

D. Router, service

E. Service, service

F. Router, global

An SDP has been configured for a VPRN service using an existing MPLS LSP and the configuration shown below. Which of the statements below is true about the configuration on an Alcatel-Lucent 7750 SR?

A. The configuration is incomplete as the uto-bind command is missing

B. The configuration is incomplete as the ignaling off command is missing

C. The configuration is incorrect as VPRN service does not support spoke-sdp configuration using MPLS LSPs

D. The configuration is incorrect as Line 8 should be poke-sdp 42 mpls create

E. The configuration is complete and correct

An advantage of using BGP as the PE-CE protocol is that route policies are no longer required to control the exchange of routes from BGP to MP-BGP.

A. True

B. False

When would it be appropriate to use the as-override command?

A. When sites of different VPRN customers use the same BGP AS number

B. When sites of the same VPRN customer use the same BGP AS number

C. When sites of different VPRN customers use different BGP AS numbers

D. When sites of the same VPRN customer use different BGP AS numbers

E. When the customer site AS number is the same as the provider AS number

Which of the following about eiBGP Load Balancing is FALSE?

A. ecmp and multipath must be configured within the VPRN instance.

B. The RD of the VPRN on the local PE must be different from the RD of the remote PEs.

C. Is enabled in the config>router>bgp context

D. Allows a PE router to load share traffic across routes learned from both direct CE-PE peerings and MPBGP peerings.

Click the exhibit.

Based on the VPRN aggregate route configuration, which routes are advertised to CE2?

A. 172.12.10.0/24, 172.12.20.0/24 and 172.0.0.0/16

B. 172.12.0.0/16 only

C. 172.12.10.0/24 and 172.12.20.0/24

D. 172.0.0.0/16 only

For Carrier Supporting Carrier (CSC) VPRN, which of the following is NOT applicable to both types of customer carriers: BGP/MPLS service providers and Internet service providers?

A. eBGP is used for route and label exchange between CSC-CE and CSC-PE routers.

B. iBGP can be used to distribute routes between CSC-CE and PE routers.

C. MP-iBGP is used to advertise routes between the CSC-PE routers.

D. MP-iBGP is used to advertise end-customer and Internet routes directly between the PE routers.

For the data packets in a VPRN, how is the inner label in an MPLS packet signaled?

A. Signaled via MP-BGP and used to identify the egress PE.

B. Signaled via T-LDP and used to identify the customer VPRN.

C. Signaled via MP-BGP and used to identify the customer VPRN.

D. Signaled via RSVP and LDP and used to identify the egress PE.

E. Signaled via RSVP and LDP and used to identify the customer VPRN.

Click the exhibit.

For the PE hub and spoke VPRN, which communities should be imported under the VPRN service on PE2?

A. "Spoke.Sites" and "Hub_Site"

B. "Hub_Site"

C. "Spoke_Sites"

D. No communities should be imported

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.

For the CE hub and spoke VPRN, which of the following is FALSE?

A. The primary VRF on PE1 contains routes learned from spoke sites.

B. All traffic between spoke sites must pass through CE1.

C. The secondary VRF on PE1 is used to route data packets from the hub CE to the spoke sites.

D. PE1 advertises the primary VRF routes to CE1.

Which of the following commands produces the output for the inter-AS model B VPRN?

A. show router 10 bgp routes vpn-ipv4

B. show router bgp routes

C. show router bgp routes vpn-ipv4

D. show router route-table

For the Inter-AS model A VPRN, which of the following is FALSE when CE2 sends an IP packet to 192.168.1.1?

A. CE2 forwards an unlabeled IP packet to PE2 via the VPRN interface.

B. PE2 pushes one label on the IP packet and label-switches it to ASBR2.

C. ASBR2 forwards an unlabeled IP packet to ASBR1.

D. ASBR1 pushes two labels on the IP packet and label-switches the packet to PE1.