Im about to take my 640-607 exam. however im having a problem understanding
subnetting. My main problem is that i dont understand the difference between
a CIDR and VSLM. Where i work, we do our subnetting totally diffent that
what all the Cisco study material teaches.
For example: at Bellsouth.net
184.108.40.206/29 would equal=
220.127.116.11= Network Address (on ISP end)
18.104.22.168= Router Address
22.214.171.124 - .12= host address
126.96.36.199= broadcast address.
Then on top of that, we put the Router address on the LAN side of the router
and customer has to turn NAT off. The WAN side of the router is doing PPPoE
and actually pulls a dynamic ip address (which we tell the customer to just
From there, the ip addresses are accessable (pingable) from the internet.
I actually understand this but i think i need to clear this out of my head
before i take the test. I keep getting the questions wrong on ever practice
test i take.
THANKS IN ADVANCE FOR ANY HELP, SUGGESTIONS, or ADVICE
18 years ago