A computer network is a collection of interconnected devices, such as computers, servers, routers, and switches, that are linked together to facilitate communication and data sharing. These devices are connected through wired or wireless connections, such as Ethernet cables or Wi-Fi, and can be located in the same building or spread across different locations.Computer networks allow for the sharing of resources, such as files, printers, and internet connections, among connected devices. They also enable communication between devices, such as sending emails, transferring files, or conducting video conferences.Computer networks can be classified into different types based on their size, geographical coverage, and purpose. Some common types of computer networks include:1. Local Area Network (LAN): A LAN is a network that covers a small area, such as a home, office building, or school. It typically uses Ethernet cables or Wi-Fi to connect devices within a limited geographical area.2. Wide Area Network (WAN): A WAN is a network that covers a large geographical area, such as multiple buildings, cities, or even countries. It connects LANs together using routers and leased lines or public internet connections.3. Metropolitan Area Network (MAN): A MAN is a network that covers a larger area than a LAN but smaller than a WAN. It typically connects multiple LANs within a city or metropolitan area.4. Campus Area Network (CAN): A CAN is a network that covers a university campus or a large corporate campus. It connects multiple LANs together and provides high-speed connectivity within the campus.5. Storage Area Network (SAN): A SAN is a specialized network that is used to connect storage devices, such as disk arrays or tape libraries, to servers. It allows for centralized storage management and enables high-speed data transfers.6. Virtual Private Network (VPN): A VPN is a network that provides secure remote access to a private network over a public network, such as the internet. It allows users to securely connect to a corporate network from remote locations.Computer networks can also be classified based on their architecture, such as client-server networks, where a central server provides services to client devices, or peer-to-peer networks, where devices communicate and share resources directly with each other.Overall, computer networks play a crucial role in enabling communication and data sharing between devices, both locally and globally. They are essential for businesses, organizations, and individuals to connect, collaborate, and access resources in today's interconnected world.
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