ABSTRACT
The Internet has graduated from simple sharing of e-mail to business-critical applications that involve incredible amounts of private information. The need to protect sensitive data over an untrusted medium has led to the creation of virtual private networks (VPNs). A VPN is the combination of tunneling, encryption, authentication, access control, and auditing technologies and services used to transport traffic over the Internet or any network that uses the TCP/IP protocol suite to communicate.
