Computer Hardware
Network Card
Definition
A network interface controller (NIC), also known as a network card, is a computer hardware component that connects a computer to a computer network.
Why It Matters
The network card is a computer's gateway to a network and the internet. It provides the physical connection and translates the computer's digital data into signals that can be sent over the network.
Contextual Example
A wired network card has an Ethernet (RJ45) port for connecting a network cable. A wireless network card (Wi-Fi card) has an antenna to send and receive radio signals.
Common Misunderstandings
- Nearly all modern computers have a network card built into the motherboard.
- Each network card has a unique physical address called a MAC address.