Shulou(Shulou.com)06/02 Report--

Today, I will talk to you about the hardware installed by the computer connection LAN protocol, which may not be well understood by many people. in order to make you understand better, the editor has summarized the following contents for you. I hope you can get something according to this article.

In order to connect a microcomputer to a local area network, the hardware that must be installed is a "network card". The network card is the basic equipment necessary to make up the network, which is used to connect the computer with the communication cable; therefore, each computer connected to the local area network needs to install a network card.

In order to connect a microcomputer to a local area network, the hardware that must be installed is a "network card".

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. It allows users to connect to each other via cable or wireless. Each computer connected to the local area network needs to install a network card.

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.

The main 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 bit stream to be transmitted and a timing signal. It is commonly used in Ethernet communication, train bus control, industrial bus and other fields.

After reading the above, do you have any further understanding of the hardware installed by the computer connection LAN protocol? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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