Regarding frame relay, which of the following statements are
true?

A.) You must use ANSI encapsulation if connecting to
non-Cisco equipment

B.) You must use IETF encapsulation if connecing to
non-Cisco equipment

C.) You must use Q.933a encapsulation if connecing to
non-Cisco equipment

D.) You must use Cisco encapsulation if connecting to
non-Cisco equipment