IP address is a unique address for a host to connect in a 
network.IP has two types.one is private add another is 
public add.
it represent 32 bit binary number.it has two name part one 
is anetwork part another is host part.ip add. network part 
is fixed part and host part is unique part.an ip -add. 
controled by IANA-INTERNET ASSIGN NUMBER OF AUTHORITY.
An ip add. is normaly expressed in decimal format.