Which of the following types of VPN uses the Internet as its main backbone, allowing users,
customers, and branch offices to access corporate network resources across various network

architectures?

A.
PPTP VPN

B.
Remote access VPN

C.
Extranet-based VPN

D.
Intranet-based VPN

Explanation:

An extranet-based VPN uses the Internet as its main backbone network, allowing users,
customers, and branch offices to access corporate network resources across various network
architectures. Extranet VPNs are almost identical to intranet VPNs, except that they are intended
for external business partners.
Answer option D is incorrect. An intranet-based VPN is an internal, TCP/IP-based, passwordprotected network usually implemented for networks within a common network infrastructure
having various physical locations. Intranet VPNs are secure VPNs that have strong encryption.
Answer option B is incorrect. A remote access VPN is one of the types of VPN that involves a
single VPN gateway. It allows remote users and telecommuters to connect to their corporate LAN
from various points of connections. It provides significant cost savings by reducing the burden of
long distance charges associated with dial-up access. Its main security concern is authentication,
rather than encryption. Answer option A is incorrect. The PPTP VPN is one of the types of VPN
technology.