The Server Name Indication (SNI) feature allows administrators to use multiple server certificates and ports for the same IP address. This allows multiple secure (HTTPS) websites (or any other Service over SSL) to be served off the same IP address without requiring all those sites to use the same certificate.
Internet Explorer 7 or later.
Windows Vista or higher.
SNI is not supported in any Internet Explorer version on Windows XP or Windows Server 2003 because SNI depends upon the SChan- nel system component shipped with Windows Vista.
Mozilla Firefox 2.0 or later
Opera 8.0 (2005) or later (the TLS 1.1 protocol must be enabled) Opera Mobile at least version 10.1 beta on Android
Google Chrome (Vista or higher; XP on Chrome 6 or newer  OS X 10.5.7 or higher on Chrome 5.0.342.1 or newer)
Safari 3.0 or later (Mac OS X 10.5.6 or higher and Windows Vista or higher)
Administrator may require configuring Fallback SSL certificate if any of the users have old web browsers that do not support Server Name Indication. See Configure Fallback SSL Certificate article to learn how to configure the Fallback SSL certificate feature.