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

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the client is a application or device that acceses the services of another computer know as a server, usually throught a computer network

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server provide services to other connected ,computers such as selling goods online or providing them whit weather information . a server respond to client requests

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ARPANETwas a computer network created on behalf of the united states department of defense for use as a means of communication between univesities and government institutions .arpanet is considered to be a network that gave to rise to the internet .

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An IP address is a number that identifies a device on a network .IP stands for internet protocol .wich is a set of rules at devices to communicate with each other .it is similar to a homer address

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a DNS is like a phone book for computers .the DNS looks up 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