This is the diagram: http://img118.imageshack.us/img118/7521/networkim4.jpg
I have used VLSM to assign network addresses to the HQ, Factory and Marketing & Sales routers. I used the "Company IP addressing" scheme as shown in the diagram.
But I don't know what to do for the ISP_Interface router. Is 220.127.116.11/29 a NETWORK address for the router, whereby I would use 18.104.22.168/29 as first available IP address, or do I assign 22.214.171.124/29 to the serial interface of that router?
My task is simply to use that limited information to IP address this network and I'm confused with what to do with the ISP Interface router and IP address given.
126.96.36.199 255.255.255.248 is the network address. The available addresses are
188.8.131.52 -> 38 with 184.108.40.206 being the broadcast address.
So you need to know what 220.127.116.11x address your ISP has used for the interface on their router and then you can choose one of the other available addresses for your router.