Secure Sockets Layer, or SSL, is a protocol used to encrypt the information exchanged between a server and its users. The practical application of using an SSL is to protect the information which clients submit on your Internet site - a login page, a payment page if you run a web-based store, and so on. Any data they input in any box on the site shall be submitted safely and securely to the server, so their login or payment information shall be protected from being accessed by unauthorized individuals. In general, an SSL certificate needs a dedicated IP address to be installed, meaning that the overall cost for your presence online shall be bigger. While this might not be a problem for a larger firm, it might matter for a non-profit organization or a small online shop that does not generate big earnings if additional money should be spent. That's the key reason why we have taken advantage of an extension referred to as Server Name Indication (SNI) and we've made it possible to use a shared server IP address to install an SSL certificate.