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答A computer network is a collection of interconnected devices, such as computers, servers, routers, and switches, that are linked together to facilitate communication and the sharing of resources. These devices are connected through wired or wireless connections, such as Ethernet cables or Wi-Fi. Computer networks can be categorized based on their size and geographical coverage. Local Area Networks (LANs) cover a small area, such as a home, office, or building, and are typically used for connecting devices within a close proximity. Wide Area Networks (WANs) cover larger areas, such as cities or countries, and connect multiple LANs together. Computer networks allow devices to communicate with each other and share resources, such as files, printers, and internet access. They also enable the transmission of data, such as emails, web pages, and video calls, between devices. Networks can be either wired or wireless, with wired networks offering faster and more reliable connections, while wireless networks provide more flexibility and mobility. Network protocols, such as TCP/IP (Transmission Control Protocol/Internet Protocol), govern how data is transmitted and received over a network. These protocols ensure that data is divided into packets, transmitted across the network, and reassembled at the destination device. They also provide addressing and routing mechanisms to ensure that data reaches the correct destination. Overall, computer networks play a crucial role in connecting devices and enabling communication and resource sharing, both within local environments and across the internet. They are essential for modern communication, collaboration, and information exchange.

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