network card
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A network card is a hardware component that plugs into your computer and allows it to connect to other computers and the internet. Without one, your computer wouldn't be able to communicate with other devices or access online services.
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Article
A network interface controller (NIC, also known as a network interface card, network adapter, LAN adapter and physical network interface) is a computer hardware component that connects a computer to a computer network.
Early network interface controllers were commonly implemented on expansion cards that plugged into a computer bus. The low cost and ubiquity of the Ethernet standard means that most newer computers have a network interface controller built into the motherboard or contained in a USB-connected dongle, although network cards remain available.