 | 1 | initial version |
Let's work out the network address:
66 81 246 0
01000010 01010001 11110110 00000000
so a /24 would become
66 81 246 0
01000010 01010001 11110110 ........
that works, because these were all zeros that were dropped.
a /23 would become
66 81 246 0
01000010 01010001 1111011. ........
that works, because these were all zeros dropped.
a /22 would become
66 81 246 0
01000010 01010001 111101.. ........
that fails because there was a one there.
So, turning this around, the network address for /20 would be
01000010 01010001 1111.... ........
66 81 240 0