Network card

Desktop computers generally use a built-in network card to connect to the network. The network card is also called "network adapter", and the English name is "Network Interface Card", or "NIC" for short. The network card is one of the most basic components in a local area network. It is a hardware device that connects a computer to a network. Whether it is a twisted pair connection, a coaxial cable connection or an optical fiber connection, data communication must be realized by means of a network card.

The main working principle of the network card is to sort the data sent to the network on the computer, and then decompose the data into data packets of a proper size and send them to the network. For the network card, each network card has a unique network node address, which is burned into the ROM (read-only memory chip) by the network card manufacturer during production. We call it the MAC address (physical address), and guarantees. Never repeat.

Our daily use of network cards are Ethernet network cards. Currently, network cards can be divided into 10M network cards, 10/100M adaptive network cards, and Gigabit (1000M) network cards according to their transmission speed. If only for general use, such as daily office, it is more suitable to use 10M network card and 10/100M adaptive network card. If applied to the server and other product areas, we must choose Gigabit Ethernet cards.