Final answer:
To calculate the broadcast address from an IP address and subnet mask, convert both to binary form, invert the subnet mask to get the wildcard mask, then perform a bitwise OR between this wildcard mask and the IP address. The result in binary form is the broadcast address, which needs to be converted back to decimal format.
Step-by-step explanation:
To find the broadcast address given an IP address and a subnet mask, you need to perform a few steps. First, you must write out the IP address and the subnet mask in binary form. Then, invert the subnet mask to get the wildcard mask. Next, perform a bitwise OR operation between the wildcard mask and the IP address. The resulting binary number is the broadcast address in binary. Finally, convert the binary broadcast address to decimal format to get the broadcast address in the standard dotted-decimal notation.
For example, let's say the IP address is 192.168.1.10 and the subnet mask is 255.255.255.0. In binary, this IP is 11000000.10101000.00000001.00001010 and the subnet mask is 11111111.11111111.11111111.00000000. The wildcard mask would be 00000000.00000000.00000000.11111111. After applying the bitwise OR operation, we get 11000000.10101000.00000001.11111111, which in decimal is 192.168.1.255. Therefore, the broadcast address for the subnet is 192.168.1.255.