the difference between ip classless and no ip classless is in the ability to ascertain whether or not the default route can or will be used...
use this site here http://subnettingmadeeasy.blogspot.com/2009/06/ip-classless-versus-no-ip-classless.html for this and many more discussions about this subject we love to hate... and check out his many more articles and tutorials...
thanks chris...
it gets tedious that for certification purposes one is compelled to perform the operations normally performed by a router in ones head... like route summarization... a ccie friend of mine one day replied, when i boasted i could subnet in my head, "why not use a subnet calculator?"
yeah, why not, Cisco?
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