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Evolution of the INTERNET.

 the foundation of the Internet is composed of global communications to hundreds of thousands of otherwise independent computers, the subjects of communication and information systems.

What this correlation is possible using a set of communication standards, procedures and formats in common between the networks and different devices and computer facilities related thereto. Procedures that computers communicate with each other are called "protocols." While this infrastructure is continuously developing new capabilities to include, initially, used by Internet protocols called "TCP / IP protocols, named after the two main protocols that formed the basis for the functioning of the Internet. On top of this infrastructure is a group developing architectural concepts and data structures for heterogeneous information systems that deliver the Internet a truly global system of information. In essence, the Internet is an architecture, although many people confuse it with its implementation.

When Internet is seen as an architecture, it manifests two different abstractions. Another attraction is about communications connectivity, packet delivery and a variety of end-end communication services. Other agreements of abstraction with the Internet as an information system, regardless account of its basic infrastructure of communication that can create, store and access a wide range of information sources, including digital objects and related services at different levels of abstraction. interconnecting computer is a digital problem itself. The process Computers and digital information exchange, which means they use a discrete mathematics "binary" or "double value" language of 1s and 0s. For communication purposes, such information is completely continuous electrical or optical waveforms. Use digital signal regeneration recovery accurate and reliable basic pieces. We use "computer" terms, "computer resources" and "account" not only traditional computing means, but digital devices in a network management, a information such as mobile applications and other computer skills. phone network operators began with hand phones linked together through "patch panels" adopted patch cords for each phone line and electrical connect them together by the panel of acting, in fact, like a switch.

The result was called circuit switching, because its conclusion, an electrical circuit is made between the phone and calling the phone call. Conventional circuit switching, which is designed to handle phone calls are inappropriate for connecting computers, because it makes limited use of telecommunications facilities and time to set up links. Although highly reliable voice communication, network, circuit-switched voice is rich problems delivering digital information without errors. For digital communications, packet switching is a better choice because it is much better suited to the typical "burst" style communications computers. computers communicate usually send short but intense bursts of data, then stay silent for a while before sending the next burst. These bars are communicated as packets, as well as electronic postcards. postcards, in fact, packets are passed from computer to computer until they reach their destination .

Computers particular broadcast are not working include the name "packet switching" or "routers" and is the equivalent of many bucket brigades voltage continents and oceans, while buckets of electronic postcards from one computer to another. Together these routers and communication links between them form the foundation of the Internet. Without packet switching, the Internet would not exist as we know it today. Return to the postcard analogy..