The enterprise may have different subdomains, so it can be costly if the enterprise purchases individual certificates. Therefore, the Wildcard certificate is worth considering as an option that secures unlimited subdomains with a single certificate and offers smooth certificate management. For example, *.mydomain.com can secure mail.mydomain.com, sales.mydomain.com, and www.mydomain.com. A single asterisk (*) allows an enterprise to secure as many subdomains as they want.

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