Wildcard and SAN: understanding multi-use SSL certificates

When you employ web-based services on the Internet, SSL certificates are the industry standard for authentication and security.
Depending on how you plan to use SSL certificates, multi-use certificates can provide greater flexibility than traditional certificates. Multi-use certificates protect multiple Fully
Qualified Domain Names (FQDNs) and subdomains, lowering your administrative costs and simplifying certificate installation, management, and deployment.