What four layer 2 MPLS VPN parameters are collected from a customer service record database to trouble a VPN connectivity issue? (Choose four)
A.
Attachment circuit information
B.
UNI interface encapsulation
C.
Hop-by-hop LDP information
D.
Virtual circuit ID information
E.
Unique service identifier
F.
PE loopback information
G.
Layer 2 MPLS VPN service type