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ip-addresssubnet

confusion on subnet total addresses

I know how to get a first and last usable, broadcast and network addresses but my question is on total addresses,

for example if I have a address 146.88.57.23/25

would it be ---> 255 - 128 = 127 + 1 = 128

would that equal to 128 of total addresses ?

Solution

  • It's been a while i haven't played with ip addresses, but if i'm right and If it's ipv4, it would be 2^7=128, so you should be right ! (7=32-25 the number of bits left for the total adresses)