[CST-2] Digi Comms

James Srinivasan jrs53@cam.ac.uk
Fri, 31 May 2002 08:40:31 +0100


> On Fri, May 31, 2002 at 00:42:21AM +0100,Barnaby Gray wrote:

> Hmm.. to be pedantic the final bits do actually always specify a host
> (or a network/broadcast address if they are all 0/1's), otherwise the
> IP address wouldn't be unique to that particular host. What you mean
> is that you can still have further subnetting and routing based on
> this inside that host part, so you can have sub-network blocks  and
> sub-host parts (I guess that's what you'd call them), but you do
> still essentially need all the way down to the last bit to directly
> identify that host.

Doesn't this break down somewhat with Network Address Translation where the
1-1 IP address-host mapping is relaxed? e.g. 131.111.243.37 refers to the
whole of Jesus College, with individual connections distinguished by a
dynamic mapping of port numbers from machines inside the college network.

James