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Question 2: Which three functions are performed by the PE router in an MPLS Layer 3 VPN? (Choose
three.)
A. translates the CE routing information into VPNv4 routes
B. exchanges routing updates with the CE router
C. exchanges VPN labels with the CE routers
D. exchanges VPNv4 routes with other PE routers over MP-BGP
E. imports and exports RTs that are received from the P routers
F. exchanges RDs with the P routers
Correct Answer: A,B,D
Explanation:
http://www.cisco.com/en/US/docs/routers/crs/software/crs_r4.1/lxvpn/configuration/guide/vc4
1v3.html How MPLS L3VPN Works MPLS VPN functionality is enabled at the edge of an
MPLS network. The PE router performs the following tasks:
* Exchanges routing updates with the CE router
* Translates the CE routing information into VPN version 4 (VPNv4) and VPN version 6
(VPNv6) routes
* Exchanges VPNv4 and VPNv6 routes with other PE routers through the Multiprotocol
Border Gateway Protocol (MP-BGP)