RE: network controls are necessary

["Tony Li" <Tony.Li@procket.com>]

|   What I was referring to was an AFI for the identifier, not for the
|   locator. So I don't care about whether the packets end up 
|   being IPv6,
|   IPv4 or CLNP, but I do care that "www.yahoo.com" is a FQDN 
|   and not an
|   IPv4 address, an IPv6 address, a CLNP NET, or a phone 
|   number. I want to
|   know it's a v4 or v6 address so I can build TCP packets that are
|   compatible with today's IPv4 or IPv6 TCP packets, even if I 
|   then choose
|   to transmit them over CLNP. I want to know if it's a phone 
|   number so I
|   can apply the processing best used for phone numbers rather 
|   than feed it
|   to the DNS and get nothing back.


That shouldn't be necessary.  Syntactically, they are all sufficiently
different that the lower layers should be able to figure this out
without difficulty.

   
|   > Nothing is perfect until you have removed all that can be removed.
|   
|   On the other hand, something that can't be expanded later 
|   to accommodate
|   new needs isn't very perfect either.


Hence the need for loose coupling.

Tony