Secure Sockets Layer, or SSL, is a protocol that is used to encode the data exchanged between a server and its users. The practical application of employing an SSL is to preserve the information which clients submit on your Internet site - a login page, a payment page if you run an Internet store, etc. Any info they enter in any box on the website shall be submitted safely and securely to the server, so their login or payment information shall be protected from being accessed by unauthorized people. Normally, an SSL certificate requires a dedicated IP address to be installed, meaning that the overall cost for your web presence shall be higher. While this might not exactly be an issue for a larger enterprise, it may matter for a non-profit organization or a small online store which does not generate big revenue if additional money should be spent. This is the key reason why we have taken advantage of an extension called Server Name Indication (SNI) and we have made it possible to use a shared server IP address to set up an SSL certificate.