Computers and Software 2

After some time, TCP / IP has been adapted to the normal, ie, in a public standard, and the term Internet came into general use. In 1983, the ARPANET was made from the MILNET, which was a treat to the Defence Data Network (DDN) U.S. Department of Defense. Internet has become a term used to refer to a single network: MILNET plus ARPANET. And while in 1991 ARPANET ceased to exist, the Internet exists, its dimensions are much greater than the original, as it brings together many networks around the world. Figure 1 illustrates the increase in the number of hosts connected to the Internet network with 4 computers in 1969 to 3.2 million in 1994. Hosts on the Internet referred to as computers, operating in multitasking operating system (Unix, VMS), supports the TCP \ IP and provide users with any network services.
Currently on the Internet used by virtually all known lines from low-to high-speed phone lines, digital satellite channels. Operating systems used in the Internet, as distinct variety. Most Internet network of computers working under operating system Unix or VMS. Widely represented as special types of network routers NetBlazer or Cisco, whose operating systems like OS Unix.

In fact, Internet is composed of many local and global networks of various companies and enterprises linked by the various lines. Internet can be imagined as a mosaic of folding of small networks of various sizes, which actively interact with one another, sending files, messages, etc.

An example of the topology of the Internet can serve as a network of H-atom, consisting of several sub-networks, and at the same time is a bit of a worldwide network of Internet.