Secure Sockets Layer (SSL) is a standard security technology for establishing an encrypted link between a server and a client - typically a web server (website) and a browser, or a mail server and a mail client.
TLS, the successor to SSL, stands for Transport Layer Security and provides security (i.e. encryption and authentication) over a TCP/IP connection. If you have ever noticed the "s" on "https" URLs, you have recognized an HTTP connection "secured" by SSL/TLS. In the past, only login/authorization pages on the web would use TLS, but in today's hostile internet environment, best practice indicates that we should secure all connections with TLS.
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