Subject Alternative Name

The Subject Alternative Name (SAN) is an extension to the X.509 specification that allows users to specify additional host names for a single SSL certificate. It was introduced to avoid the limitations of the Common Name (CN) field in SSL certificates. The SAN field can include multiple values, which may consist of: 1. **DNS Names**: Additional domain names (e.g., www.example.com, example.org). 2. **IP Addresses**: Specific IP addresses associated with the certificate.