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On Wed, May 12, 2010 at 8:57 AM, Gordon Henderson <gordon+dcglug@xxxxxxxxxx> wrote: > On Wed, 12 May 2010, James Fidell wrote: > > At least 15 years... > > I was working for an ISP in 1995 when the great debate was kicking off and > CIDR was "invented" Lots of routers back then (ie. cisco) were buggy as they > had all the netmasks for the old "Class A,B,C" networks hard-wired into > them. We were using BSD boxes as routers back then, so didn't really have > any issues with the "experimental" /16's RIPE gave us (out of Class A space) > to .. er .. experiment with. (And people today still talk about Class A, B, > .. networks )-: Perhaps CIDR should be covered sooner but it still useful for students to learn about it in stages - start with classful and get 'em to setup a 2-router configuration with Class A on the LAN side of Router A, Class B between the 2 routers (ie pretend WAN side) and Class C on the LAN side of Router B - they can then easily see the differences between the 3 sections and should be able to visualise the process of data flowing from Router-A-LAN to Router-B-LAN via the pretend WAN. Grant. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html