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a computer network is a set of equipment or software connected to each other by means of physical devices that send and receive data, with the purpose of sharing information, recourses and offering services.

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The client is an application or device that accesses the services of another computer known as a server, usually through a computer network.

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servers provide services to other connected computers such as selling goods online or providing them with weather information. a server responds client requests.

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ARPANET was a computer network created on behalf of the United States Department of Defense for us as a means of communication between universities and government institutions ARPANET is considered to be a net work that gave rise to the Internet.

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a DNS is like a phone book for computers the DNS looks for URLs and finds their IP address. For example,If TBox Planets IP Address is 216.58.219.164. people arrive at this site by entering www.tboxplanet.com and not the IP address