bits in netmask for ip_prefix use.

[Gerald Waugh]

"Glen Harvy" <glen at aquarius.com.au>  wrote
> Can someone advise me what the actual number of bits are in the netmask for 
> the network 203.58.25.1 thru 127 with a netmask of 255.255.255.128 .

the netmask 11111111 - 11111111 - 1111111 - 10000000
The '0' count.
You have 203.58.25.0 - 127
203.58.25.0  being the network, not 203.58.25.1.
this is known as a sub-class-c network /25 (25 '1' bits)
Gerald