Communication network based on point-to-point communication

Internet is a collection of networks or network of networks
. Various networks such as LAN and WAN connected through suitable hardware and software to work in a seamless manner
. Schematic diagram of the Internet is shown in Fig
.  It allows various applications such as e-mail, file transfer, remote log-in, World Wide Web, Multimedia, etc run across the internet
. The basic difference between WAN and Internet is that WAN is owned by a single organization while internet is not so
. But with the time the line between WAN and Internet is shrinking, and these terms are sometimes used interchangeably.