A network adapter is a hardware component or device that allows a computer to connect to a network or the internet. It enables communication between the computer and other devices through wired connections (Ethernet) or wireless connections (Wi-Fi).

Network adapters can be built into the motherboard or added separately through expansion cards or USB devices. They work with network drivers and convert data into signals that can be transmitted over a network, allowing users to browse the internet, share files, and communicate with other devices.