(As one of the most basic components of the local area network, the network card is generally not within the standard configuration of many builders, but it is impossible to assume that there is no network card in the local area network, just like only the monitor does not have a graphics card. It is impossible to form a local area network without a network card. As the primary accessory for connecting network terminals, it plays an infinite role in a comprehensive network. The network card is a network interface card, which plays the role of sending data to the network, controlling data, receiving)