Which two statements about MPLS Label Distribution Protocol (LDP) are true? (Choose two)

A.
LDP hello packets are sent to TCP 646.

B.
LDP session packets are sent to TCP 646.

C.
LDP session packets are sent to TCP 711.

D.
LDP hello packets are sent to TCP 711.

E.
LDP hello packets are sent to UDP 711.

F.
LDP hello packets are sent to UDP 646.