Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has
built-in security mechanisms?
A.
HDLC
B.
PPP
C.
X.25
D.
Frame Relay
Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms?
Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has
built-in security mechanisms?