VPN :
A virtual private network (VPN) is a private network that interconnects remote
(and often geographically separate) networks through primarily public communication
infrastructures such as the Internet.VPNs provide security through tunneling protocols and
security procedures [1] such as encryption.

SSL:
SSL (Secure Sockets Layer) is the accepted protocol used to protect data that is sent between a
web site and a web browser. An encrypted SSL connection requires that all data passed between
the browser and the web site server be encrypted by the sender and decrypted by the receiver.
SSL can prevent unauthorized parties from gaining access to sensitive, confidential, or personal
information such as a phone numbers or addresses.

SSL is used to encrypt a web session only, and is needed for e-commerce. VPN permits secure
remote access to your network (protocols other than WWW), so that people working from home can
"dial-in" to access corporate resources (databases, source-code control systems, email, etc)

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