A layer 2 circuit (RFC 4447) is established between two PE routers to provide connectivity between two
customer sites.
Which two statements related to this deployment are true?

A.
Kompella encapsulation is used in the data plane communications.

B.
LDP must be used for the control plane communications.

C.
BGP must be used for the control plane communications.

D.
Martini encapsulation is used in the data plane communications.

Explanation:
Junos OS substantially supports t RFC 4447, Pseudowire Setup and Maintenance Using the Label Distribution
Protocol (LDP).
Martini uses directed LDP to signal the VPN label between the PE devices, Kompella uses BGP to signal the
VPN label between the PE devices.
https://www.juniper.net/documentation/en_US/junos15.1/topics/reference/standards/layer-2-
circuit.html