Which two options are valid WAN connectivity methods? (Choose two.)
A. PPP B. WAP C. DSL D. L2TPv3 E. Ethernet
Correct Answers: A, C
Explanation: The Point-to-Point Protocol (PPP) provides a standard method for transporting multi-protocol datagrams over point-to-point links. PPP was originally emerged as an encapsulation protocol for transporting IP traffic between two peers. It is a data link layer protocol used for WAN connections. DSL is also considered a WAN connection, as it can be used to connect networks, typically when used with VPN technology.