SAN Certificate allows multiple server or domain names using the same secure SSL Certificate. A normal SSL Certificate protects only one Fully Qualified Domain Name. In a SAN SSL several alternatives of common names can be placed in the ‘Alternative Name field. Along with single SAN certificate you can secure multiple private and public domain names, server host names, IP addresses as well gateway and firewall devices host names.
SAN Certificate is recommended for securing Microsoft Exchange 2007, Exchange 2010, Share Point servers, and Communication servers as well firewall and gateway devices
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