4 ms·
There's also RFC-1738 (URL syntax), which says: host The fully qualified domain name of a network host, or its IP address as a set of four
by metageek 16y ago
There's also RFC-1738 (URL syntax), which says:
host
The fully qualified domain name of a network host, or its IP
address as a set of four decimal digit groups separated by
".". Fully qualified domain names take the form as described
in Section 3.5 of RFC 1034 [13] and Section 2.1 of RFC 1123
[5]: a sequence of domain labels separated by ".", each domain
label starting and ending with an alphanumerical character and
possibly also containing "-" characters. The rightmost domain
label will never start with a digit, though, which
syntactically distinguishes all domain names from the IP
addresses.
http://www.ietf.org/rfc/rfc1738.txt http://www.ietf.org/rfc/rfc1738.txt