God. Dammit. This is the second time today I’ve seen www referred to as a subdomain & I’m going to lose my shit.
Does it have an A record? Then it’s a hostname. The use of a domain as a hostname (CNAMEing www to an A record for the domain) still gives me hives.
#GetOffMyLawnhttps://twitter.com/_r00k_/status/1039271145181081600 …
Could you please explain in more detail? I don't understand. If I have "A" records for both www.example[.]com and foobar.example[.]com, how are they any different? foobar and www are both subdomains of example[.]com, no?
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The things between the periods are "labels". "com" is a label and is also the top-level-domain (TLD). "example" is a domain (and a subdomain of com). "www" is a hostname. For names like http://www.us.example.com then the "us" part would be a subdomain of http://example.com
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So www is a special case? Where is this defined? I still don't understand what makes "www" a hostname, but "us" a subdomain, in your example.
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