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How Virtual Private Networks Work
With, un-trusted public networks operated by
the Internet Service Provider can be without any additional expensive
private communication link to securely connect remote users' computers
to the corporate network.
Courtesy: Cisco Systems Inc.
Moreover security is also not an issue as the remote computer
will be authenticated and the data exchanged with the VPN server
are encrypted.
Image courtesy
Cisco Systems, Inc.
A typical VPN
might have a main LAN at the corporate headquarters
of a company, other LANs at remote offices or facilities
and individual users connecting from out in the field.
Basically,
a VPN is a private network that uses a public network
(usually the Internet) to connect remote sites or
users together. Instead of using a dedicated, real-world
connection such as leased line, a VPN uses "virtual"
connectionsthrough the Internet from the company's
private network to the remote site or employee. In
this article, you will gain a fundamental understanding
of VPNs, and learn about basic VPN components, technologies,
tunneling and security.
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