Which two options are valid WAN connectivity methods? (Choose two.)
A.
PPP
B.
WAP
C.
DSL
D.
L2TPv3
E.
Ethernet
Explanation:
On each WAN connection, data is encapsulated into frames before itcrosses the WAN link. The
following are typical WAN protocols:1. High-level Data Link Control (HDLC): The Cisco default
encapsulation type onpoint-to-point connections, dedicated links, and circuit-switches
connections.2. PPP: Provides router-to-router and host-to-network connections over synchronous
andasynchronous circuits. PPP was designed to work with several network layer protocols,including
IP.3. Frame-relay: A successor to X.25. This protocol is an industry-standard, switchesdata-link layer
protocol that handles multiple virtual circuitshttp://en.wikipedia.org/wiki/Wide_area_network