In usage on Internet Protocol networks, broadcast addresses are formed by distinguished values for the host-number part of an IP address. Broadcast address should be one that is not likely to be assigned to any one host, such as the addresses consisting of all ones or all zeros in the rest field.broadcast address is generally obtained by performing a bitwise OR operation between the bit
. complement of the subnet mask and the IP address. For further information click the link provided. http://www.tech-faq.com/broadcast-address.shtml