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A network router refers to an electronic device designed primarily for connecting multiple computer systems and other devices together on a single network, enabling data transmission between them. It operates by forwarding data packets between networks based on their IP addresses. Network routers are integral components of wide area networks (WANs) and local area networks (LANs), as well as interconnected networks such as the Internet. These devices facilitate communication between different computer systems, enabling file sharing, internet access, and network gaming, among other functions. They can be standalone devices or integrated into other electronic systems like car computer systems and car stereo systems. In the latter case, they provide Wi-Fi connectivity for these in-car electronics. Network routers come in various forms, including wired and wireless versions, with varying specifications such as speed, range, and number of simultaneous connections supported. They can be used at home or in larger organizations to manage network traffic efficiently and securely.