(Computer network technology is the product of the combination of communication technology and computer technology. A computer network is a collection of loose, independent computers on the earth that connect to each other in accordance with network protocols. The coupling medium can be cable, twisted pair, fiber optic, microwave, carrier wave, or communications satellite. The computer network has the function of sharing hardware, software and data resources, and has the ability to manage, manage and maintain the shared data resources collectively)
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