A computer network is a collection of interconnected devices that can communicate and share resources with each other. These devices can include computers, servers, printers, and smartphones. Networks can be classified into different types, such as local area networks (LANs) and wide area networks (WANs), depending on their size and scope. The primary purpose of a computer network is to enable data exchange and resource sharing among users. This allows for efficient communication, collaboration, and access to shared services like the internet or file storage. Networks can be wired, using cables, or wireless, using Wi-Fi technology.