computer network, two or more computers that are connected with one another for the purpose of communicating data electronically. Besides physically connecting computer and communication devices, a network system serves the important function of establishing a cohesive architecture that allows a variety of equipment types to transfer information

2. Area Covered
What the computer network is
 Computer network communication
 Types of Network
 Network topology

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6. Local Area Network
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7. Metropolitan Area Network
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8. Wide Area Network
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10. Types Network topology
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