Secure Sockets Layer (SSL)/Transport Layer Security (TLS)
One of the key VPN protocols today is SSL/TLS, which is the main alternative for a VPN solution if you do not want to leverage an IPSec solution. However, before you consider this protocol in conjunction with VPNs, it is important to understand the origin of this protocol.
If you have ever surfed the World Wide Web (WWW), you have used the Hypertext Transfer Protocol (HTTP) to connect to a website. One of the drawbacks of HTTP is that it does not include the ability to encrypt or otherwise protect the data stream between the client and server. This was not an issue until the early 1990s, when the need to protect against eavesdropping on communications became critical to the ultimate ...
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