IP addresses are used to transfer information across the internet. If you type www.ibm.com
into your browser, your computer resolves this friendly name into the equivalent
IP Address of IBM’s webserver, and then retrieves their homepage using this IP address.
While you are connected to the internet, you are assigned a unique IP address as
well, which is shown at the top of this page. IP addresses are defined in the TCP/IP
protocol family, which is the basic technical foundation of the internet.