A network card

​A network card is used to send and receive network traffic by a computer.

A home computer and some server computers may have a network functionality that is built in into the motherboard.

Standalone network cards usually have better performance than in-board network cards.

Standalone network cards may have more than one port for a network connection, where onboard network interface is usually just one.

Separate physical connections can be aggregated or bonded together to form a single virtual network interface.

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