In PPPoA architecture, which two methods are most commonly deployed? (Choose two)

A.
terminating PPP sessions at the service provider

B.
PPP framing

C.
PPP multiplexing

D.
GRE tunneling

E.
L2TP tunneling

Explanation:
Reference:
http://www.cisco.com/en/US/tech/tk175/tk819/technologies_white_paper09186a0080093bd2.shtml