Secure Sockets Layer, or SSL, is a protocol employed to encrypt the data exchanged between a server and its users. The practical application of using an SSL is to secure the data which customers submit on your website - a login page, a payment page if you run an Internet store, and so forth. Any data they input in any box on the website shall be submitted securely to the server, so their login or payment data shall be protected from being accessed by unauthorized individuals. Usually, an SSL certificate needs a dedicated IP address to be installed, which suggests the overall cost for your presence online shall be bigger. While this might not exactly be a problem for a larger business, it may matter for a non-profit organization or a small online store that doesn't generate big earnings if additional money should be spent. That's the reason why we have taken advantage of an extension referred to as Server Name Indication (SNI) and we have made it possible to use a shared server IP address to set up an SSL certificate.