A computer network is a system that connects multiple devices, such as computers, servers, printers, and other peripherals, to enable communication and data exchange between them. The devices in a network are connected by various methods, including wired and wireless connections, to create a network that can share resources and information.

In a computer network, devices are typically connected by a combination of hardware, software, and protocols. The hardware components include network interface cards, routers, switches, and cables, while the software includes network operating systems and applications that facilitate communication and data exchange between devices. Protocols are rules and procedures that define how data is transmitted between devices in a network.

Computer networks can be classified into different types based on their geographic scope, topology, and ownership. The most common types of computer networks are local area networks (LANs), wide area networks (WANs), and metropolitan area networks (MANs).

LANs are computer networks that are limited to a small geographical area, such as a home, school, or office. LANs are typically connected by Ethernet cables or wireless connections, and they are used to share resources such as printers, storage devices, and Internet connectivity.

WANs, on the other hand, are computer networks that cover a large geographical area, such as a city, region, or country. WANs are typically used to connect devices across long distances and are often used by businesses and organizations to facilitate communication and data exchange between their different branches.

In summary, a computer network is a system that connects multiple devices to enable communication and data exchange between them. Computer networks are classified based on their geographic scope, topology, and ownership, and they are used to share resources and information between devices.

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