Virtual Private Network Application Notes; What Is A Virtual Private Network - ZyXEL Communications SBG3300 series User Manual

Virtual Private Network Application Notes

What is a Virtual Private Network?

VPN stands for 'Virtual Private Network'. In the past, when we needed to
transmit data in a secure way, we would need to have a site-to-site leased line
between the sites. This incurred very high costs for installing the lines.
A VPN gives users a secure way to access corporate network resources over the
Internet or other public or private networks without the expense of leasing
site-to-site lines.
A secure VPN is a combination of tunneling, encryption, authentication, access
control and auditing technologies/services used to transport traffic over the Internet
or any insecure network that uses the TCP/IP protocol suite for communication.