What is the default encapsulation type for Cisco WAN serial interfaces?
A. GRE
B. PPP
C. Frame Relay
D. IEEE 802.1Q
E. HDLC
What is the default encapsulation type for Cisco WAN serial interfaces?
A. GRE
B. PPP
C. Frame Relay
D. IEEE 802.1Q
E. HDLC