All computer in the Internet has its own unique
number which is called IP Address or Internet
Address. IP Address is compared as “the house
number of a computer”
Managing IP address is a duty of Internet Assigned
Numbers Authority (IANA) , a department operated
by the Internet Corporation for Assigned Names and
Numbers (ICANN)
IPv4 uses 32-bit (four-byte) addresses, which limits
the address space to 4,294,967,296 (232) possible
unique addresses. This number seemed adequate
until 1998.