What is the primary function of a network interface card (NIC)?

The primary function of a network interface card (NIC) is to allow a device to connect to a network and communicate with other devices. A NIC facilitates the conversion of data between the device's internal format and the network format, enabling communication over wired or wireless networks. It provides the necessary hardware interface to connect to the physical network, whether through an Ethernet cable or a wireless signal.

The NIC also handles data packets, ensuring that information is correctly sent and received, often implementing protocols such as Ethernet or Wi-Fi. Without a NIC, a computer or device would be unable to connect to a network, preventing it from accessing the internet or communicating with other devices.

In contrast, the other options describe functions that do not pertain to the role of a NIC. Managing the power supply is a function of the power supply unit, graphical output enhancement relates to a graphics card, and temporary data storage during processing is handled by RAM.