Which of the following statements pertaining to VPN protocol standards is false?
A.
L2TP is a combination of PPTP and L2F.
B.
L2TP and PPTP were designed for single point-to-point client to server communication.
C.
L2TP operates at the network layer.
D.
PPTP uses native PPP authentication and encryption services.
Explanation:
The Layer 2 Tunnel Protocol (L2TP) is an emerging Internet Engineering Task Force (IETF) standard
that combines the best features of two existing tunneling protocols: Cisco’s Layer 2 Forwarding (L2F)
and Microsoft’s Point-to-Point Tunneling Protocol (PPTP). L2TP is an extension to the Point-to-Point
Protocol (PPP), which is an important component for VPNs. VPNs allow users and telecommuters to
connect to their corporate intranets or extranets. VPNs are costeffective because users can connect
to the Internet locally and tunnel back to connect to corporate resources. This not only reduces
overhead costs associated with traditional remote access methods, but also improves flexibility and
scalability. PPTP and L2TP are Layer 2 tunneling protocols; both encapsulate the payload in a Pointto-Point Protocol (PPP) frame to be sent across an intermediate network.