Early Computer Networks

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A network is a collection of entities that exchange information or good. Few examples of networks are nervous system, traffic light system, railway system etc. Computer Network is normally known as a system of interconnected computers & communication devices that can communicate with one another and share resources. At the most elementary level computer consist of two computers connected with each other by a cable to allow them to share data .A device connected to a network is called a node. A node may be a device such as a computer, a printer, workstation etc.
When we are talking about computing network we need to know about history of computer network. Early networks of communicating computers included the military radar system. Semi-Automatic Ground Environment (SAGF) started in the latest 1950’s. In the early 1960s, individual computers had to be physically shared, making the sharing of data and other information difficult. Seeing this was impractical, researchers developed a way to connect the computers so they could share their resources more efficiently. Hence, the early computer network was born. Through the then-new communication protocol known as packet switching, a number of applications, such as secure voice transmission in military channels became possible. These new circuits provided the basis for the communication technologies of the rest of the 20th century, and with further refinement these were applied to computer networks. These networks provided the basis for the early ARPANET, which was the forerunner of the modern Internet. The Advanced Research Projects Agency (ARPA) submitted the proposal for the project on June 3, 1968 which was approved a few weeks later. This proposal entitled “Resource Sharing Computer...

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..., the ARPANET (Advanced Research Project Agency Network) started in late 1960s.Its main objective was to provide network links between universities, research organization and remote computer centers. No person, government or an entity owns or controls internet. Instead, a nongovernmental international volunteer organization called the internet society (ISOC) controls the standards and the future of the internet.
Today computer networks are the core of the modern communication. All modern aspects of the public switched telephone network are computer controlled. And telephony increasingly runs over the Internet Protocol, although not necessarily public internet. The scope of communication has increased significantly in the past decade, and this born in communication would not have been possible without the progressively advancing computer network.

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