Often known as the IP address. This is a unique 32-bit address which identifies a computer and the subnetwork in which it resides. Most users see this address as a series of four integers separated by full stops, a notation known as dotted quad notation. The address is used by the TCP-IP protocols to correctly send a collection of datagrams to a destination computer identified by its Internet Protocol address. There are four formats for this address according to the size of the subnetwork involved and whether multicasting is used. See also Internet Protocol Version 6.