What is the concept of a network controller?

[ Huaqiang Security Network News ]

The network controller, also known as the network card or NIC (network interface controller), is called Network Interface Card in English. It is a computer hardware designed to allow computers to communicate on a computer network.

Network controller

Network controller

In the network, if a computer does not have a network card, then this computer will not be able to communicate with other computers, it will not get any services provided by the server. Of course, if the server does not have a network card, it can not be called a server, so the network card is a necessary device for the server, just like a normal PC (personal computer) with a processor. Usually, the network card on the PC we see is mainly connecting the PC to the LAN (local area network), and the server network card is generally used for the connection between the network devices such as the server and the switch.

Since the network controller has a MAC address, it belongs to the second layer of the OSI model, which allows users to connect to each other via cable or wireless. Each network controller has a unique 48-bit serial number called a MAC address that is written in a ROM on the card. Every computer on the network must have a unique MAC address. No two NICs produced have the same address. This is because the Institute of Electrical and Electronics Engineers (IEEE) is responsible for assigning unique MAC addresses to network interface controller vendors.

The network controller uses a specific physical layer and data link layer standard, such as Ethernet or Token Ring, to implement the circuitry needed for communication. This provides the foundation for a complete network stack that enables communication between small groups of computers on the same LAN and wide area networks such as IP through routing protocols.

The above is a detailed answer to what the network controller is. For more information about the network controller, please continue to pay attention to this website.

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