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Hostname, Domain Name, and FQDN

Authors
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    Bowen Y
    Twitter

What’s the difference between a hostname, a domain name, and an FQDN? A hostname refers to a particular device on a network. So, in the URL www.mybusiness.com, “www” is the hostname.

A domain name identifies the website. So, stick with the example website URL www.mybusiness.com. “Mybusiness” is the domain name. Multiple hostnames can be associated with a singular domain.

The FQDN is the hostname, domain name, and TLD (e.g., .com). So, “www.mybusiness.com” is the FQDN.