<darshan(_dot_)karandikar(_at_)tcs(_dot_)com> wrote:
Is "www.my.domain.again.my.domain.com" a valid URL on INTERNET?
It's a valid relative URL, but I think that's not what you want
to know...
I know that "http://my.domain.again.my.domain.com" can be a
valid INTERNET DNS address
...the other way around it makes sense: Your first string is a
syntactically valid DNS domain name, and your second string is
a valid HTTP URL for this domain. Just in case you could add a
trailing dot to your first string, and a trailing slash to your
second string. For technical details about URIs please look in
<http://tools.ietf.org/html/rfc3986>.
If you have questions about RFC 3986 better ask them on the URI
list uri(_at_)w3c(_dot_)org, see <http://dir.gmane.org/gmane.org.w3c.uri>.
Does "www" has any significance in this URL when it comes to
DNS name resolution?
Yes, the strings without www are different, you could end up at
a different host. Or in the case of the URL you could get a
different homepage or an error. Often Web servers arrange that
you get the same content, but that is not required. Check out
RFC 4367 for some details.
Frank
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