Answer Posted / hitesh
A broadcast address is an IP address that you can you to
target all systems on a specific subnet instead of single
hosts. The broadcast address of any IP address can be
calculated by taking the bit compliment of the subnet mask,
sometimes referred to as the reverse mask, and then
applying it with a bitwise OR calculation to the IP address.
If you have a system with IP address 192.168.12.220 and a
network mask of 255.255.255.128, what should the broadcast
address for the system be? Remember, to do this
calculation, you need to convert all numbers to binary
values. For bitwise OR, remember that any two values where
at least one value is "1", the result will be "1",
otherwise the result is "0".
IP Address: 11000000.10101000.00001100.11011100
Reverse Mask: 00000000.00000000.00000000.01111111
bitwise OR: -------------------------------------
Broadcast: 11000000.10101000.00001100.11111111
Convert the binary value back to octal, and you have your
resulting value of 192.168.12.255.
| Is This Answer Correct ? | 12 Yes | 4 No |
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