The GOLDEN RULES for
allocating IP numbers

1. All hosts on the same physical network must use the same unique prefix (network number)

   10101001 11011110 00010000 0xxxxxxx
   

2. The remaining part (host number) must be different for each host

   10101001 11011110 00010001 0xxxxxxx
   

3. Host numbers of all zeros and all ones are reserved

   Network number
   10101001 11011110 00010001 00000000
   
   Broadcast address
   10101001 11011110 00010001 01111111