Whether the network interface card (NIC) is part of your PC’s motherboard circuitry or attached as an expansion card, you can inspect its status by using the Device Manager in Windows 7 and Windows Vista. Follow these steps to check on the NIC hardware: Open the Control Panel. Open the Device Manager.
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A network interface card (NIC) is a hardware component without which a computer cannot be connected over a network. It is a circuit board installed in a computer that provides a dedicated network connection to the computer. It is also called network interface controller, network adapter or LAN adapter.
Purpose
NIC allows both wired and wireless communications.
NIC allows communications between computers connected via local area network (LAN) as well as communications over large-scale network through Internet Protocol (IP).
NIC is both a physical layer and a data link layer device, i.e. it provides the necessary hardware circuitry so that the physical layer processes and some data link layer processes can run on it.
Types of NIC Cards
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NIC cards are of two types −
Internal Network Cards
In internal networks cards, motherboard has a slot for the network card where it can be inserted. It requires network cables to provide network access. Internal network cards are of two types. The first type uses Peripheral Component Interconnect (PCI) connection, while the second type uses Industry Standard Architecture (ISA).
External Network Cards
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In desktops and laptops that do not have an internal NIC, external NICs are used. External network cards are of two types: Wireless and USB based. Wireless network card needs to be inserted into the motherboard, however no network cable is required to connect to the network. They are useful while traveling or accessing a wireless signal.