What is the original protocol of wireless LAN

The original protocol of wireless LAN is "IEEE802.11"; "IEEE 802.11" is the common standard for wireless LAN today. It is the standard for wireless network communication defined by the Institute of Electrical and Electronics Engineers "IEEE".

#The operating environment of this article: Windows 7 system, Dell G3 computer.

What is the original protocol of wireless LAN?

The original protocol of wireless LAN is "IEEE802.11".

Since World War II, wireless communications have received attention due to their military applications. Wireless communications have been developing, but they lack a wide range of communication standards. As a result, IEEE formulated the first version of the standard for wireless LAN in 1997 - IEEE 802.11. The media access control layer (MAC layer) and physical layer are defined. The physical layer defines two spread spectrum modulation methods and an infrared transmission method operating on the 2.4GHz ISM frequency band. The total data transmission rate is designed to be 2Mbit/s.

Two devices can build a temporary network by themselves, or they can communicate under the coordination of a base station (Base Station, BS) or access point (Access Point, AP). In order to obtain good communication quality in different communication environments, the CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) hardware communication method is adopted.

Two supplementary versions were added in 1999: 802.11a defines a physical layer with a data transmission rate of up to 54Mbit/s in the 5GHz ISM band, and 802.11b defines a ISM band in the 2.4GHz band But the data transfer rate is up to 11Mbit/s physical layer. The 2.4GHz ISM frequency band is used by most countries in the world, so 802.11b is the most widely used. Apple named the 802.11 standard it developed AirPort. In 1999, the industry established the Wi-Fi Alliance, dedicated to solving the production and equipment compatibility issues of products that match the 802.11 standard.

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