broadcast address


Also found in: Dictionary, Thesaurus, Legal, Wikipedia.

broadcast address

An address that enables transmission to every node in a local network. The address is the highest numeric value of the address format being used. An Ethernet broadcast address is all binary 1's. An IP broadcast address is the highest number in its class; for example, the broadcast address of a Class C 192.168.16.0 network is 192.168.16.255.

Subnet Broadcast Addresses
The broadcast address for a subnet must account for the part of the address that is reserved for the subnet. Using the above Class C example configured for six subnets would have a broadcast address of 192.168.16.31. It is derived as follows. For more on the Class C example, see subnet mask. See broadcast and multicast.
Class C Mask for Six Subnets  255      255      255    224
 11111111.11111111.11111111.11100000

 Step 1Invert the mask.0        0        0           31
 00000000.00000000.00000000.00011111

 Step 2OR the inverted mask with an IPaddress in the subnet, such as192.168.16.1. 192       168        16           1
 11000000.10101000.00010000.00000001 
 00000000.00000000.00000000.00011111
 -----------------------------------
 11000000.10101000.00010000.00011111
 192       168        16          31
References in periodicals archive ?
In a nationally broadcast address Friday night, Flores asked the doctors to return to work and put an end to their "unnecessary strike.
In a nationally broadcast address, Bush acknowledged that "suspicions and insights of some of our frontline agents did not get enough attention" and he urged employees of the CIA, FBI and other intelligence agencies to report anything that raised concerns.
In a nationally broadcast address, Bush acknowledged that ``suspicions and insights of some of our frontline agents did not get enough attention'' before the September 11 attacks.
In a nationally broadcast address Tuesday, President Ernesto Zedillo called the massacre ``an absurd criminal act.
In order to meet New York's crushing fiscal problems, the Mayor said in his formal broadcast address that the city has been forced to take doomsday measures in order to confront the budget crisis.
It wouldn't be wise, as some suggest, to just kick the debt ceiling can down the road for a couple of months, and flirt with a first-ever intentional default right in the middle of the holiday shopping season," Obama said in his weekly broadcast address.