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What is the network card on the computer? In view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

A network card is a piece of computer hardware designed to allow computers to communicate over a computer network. Because it has an MAC address, it belongs to layer 2 of the OSI model.

Network cards allow users to connect to each other via cable or wireless. Each network card has a unique 48-bit serial number called the MAC address, which is written in a ROM on the card. Every computer on the network must have a unique MAC address. No two produced network cards have the same address. This is because the Institute of Electrical and Electronic Engineers (IEEE) is responsible for assigning unique MAC addresses to network interface controller (Nic) vendors.

Expand knowledge:

Functions of the network card:

1. Encapsulation and unencapsulation of data

When sending, the data transmitted from the upper layer is added to the head and tail to become the frame of Ethernet. When receiving, the Ethernet frame is stripped of the head and tail, and then sent to the upper layer.

2. Link management

It is mainly realized through CSMA/CD (Carrier Sense Multiple Access with Collision Detection, Carrier sense multiple access with collision Detection) protocol.

3. Data coding and decoding

Manchester coding and decoding. Manchester code, also known as digital bidirectional code, phase separation code or phase coding (PE), is one of the commonly used binary code line coding methods, which is used by the physical layer to encode a synchronous bit stream clock and data.

In communications, a code used to represent the combination of data in a bitstream to be transmitted with a timing signal. It is commonly used in Ethernet communication, train bus control, industrial bus and other fields.

This is the answer to the question about what is the network card on the computer. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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