Network devices are hardware components that facilitate communication and data transfer between computers and other devices within a network. Common examples include routers, switches, and hubs. These devices help manage data traffic, ensuring that information reaches its intended destination efficiently. Routers connect different networks, directing data packets between them, while switches connect multiple devices within the same network, allowing them to communicate directly. Hubs serve a similar purpose but are less efficient, broadcasting data to all connected devices. Together, these network devices form the backbone of modern communication systems.