These are the slides for the CS3/MSc comms talk that I gave in March 1998.

	comms.dvi	contains the main text.

	comms_1.eps	shows the network ca. 1986.

	comms_2.eps	shows the final 10base2 network, before we
			installed 10baseT everywhere.

	comms_4.?.eps	show three stages in the evolution of the
			current 10baseT/100baseT network: the first
			has only one spine, the second has three
			parallel spines added, and the third has
			the parallel 100baseT spine added.

	comms_6.eps	is pure speculation about where we might go
			in the future.

The slides mention RIP and OSPF.  The RFCs that describe these, and lots of
other things as well, are in http://www.dcs.ed.ac.uk/home/RFC/ (look in
rfc-index.txt.gz first).

PostScript: we have a new solution to the multi-homed host problem.  Our
external DNS servers now filter the dcs.ed.ac.uk zone after it's been fetched
from the master, converting any generic CNAME RRs into the "best" wire-
specific one for external users.  By thus presenting a different view to
internal and external users we can get better behaviour for both.

      Name                    Last modified      Size  Description
      comms.dvi               1998-03-18 15:06  9.6K  
      comms_1.eps             1998-03-18 15:06  6.1K  
      comms_2.eps             1998-03-18 15:06  5.6K  
      comms_4.1.eps           1998-03-18 15:06  8.1K  
      comms_4.2.eps           1998-03-18 15:06  8.5K  
      comms_4.3.eps           1998-03-18 15:06  8.8K  
      comms_6.eps             1998-03-18 15:06  5.1K