On Fri, 5 Dec 2008, Keith Moore wrote:
Stephane Bortzmeyer wrote:
For a good part, this is already done. You cannot use IP addresses for
many important applications (the Web because of virtual hosting and
email because most MTA setup prevent it).
you're generalizing about the entire Internet from two applications?
It's a general truth that application protocols need a layer of addressing
of their own, and it isn't sufficient to just identify the host the
application is running on. The special cases are the applications that do
not need extra addressing.
In the cases where protocols do not support their own addressing
architecture, we have usually been forced to retro-fit it or bodge around
it. For example, the HTTP Host: header, the TLS server_name extension, the
subjectAltName x.509 field, the use of full email addresses instead of
usernames as login names for IMAP and POP. XMPP got this right.
Tony.
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