
25 Jun
1996
25 Jun
'96
5:01 p.m.
1- using a /30 subnet for each link: in this way both ends of the link have a unique address (binary 01 and 10), but two addresses (binary 00 and 11) cannot be used, so 50% of the address space used is wasted. This should be avoided if possible because the address space required is really large.
The usage is actually 75%, as there are effectively three addresses: the two ends (00 and 01) and the broadcast address for the network (11). 10 is the unused address. Mike