[CST-2] Digi Comms

[Tom Puverle]

> To explain further, 128.232.2 in binary is
>     10000000 11101000 00000010 00000000.
> 
> and the netmask specified by the /18 is
>     11111111 11111111 11000000 00000000.
> 

I would also like to add that the final bits in CIDR 
don't necessarily specify a host. In fact it can be
a cluster of networks on the same geographical site,
but from a core router they appear to be the same thing.
(And hence CIDR allows smaller routing tables). However,
for this to work then networks have to assigned IP numbers
from a continuous range, which nowadays with IP fragmentation
may be quite difficult. That's why CIDR is "too little, too late"