WLAN 802.11

There are several different versions of 802.11 WLAN systems that have evolved over time and some (not all) of these versions are compatible with other versions of 802.11 wireless LAN. The key differences include frequency band, type of wireless access, and maximum data transmission rates.

This figure shows how 802.11 LAN systems have evolved over time. This diagram shows that the original 802.11 specification offered 1 or 2 Mbps data transmission rates and operated at 2.4 GHz. This standard evolved through new modulation to produce 802.11b that provides operated at 2.4 GHz and provided data transmission rates up to 11 Mbps. This diagram also shows that a new 802.11a system was developed that provides data transmission rates up to 54 Mbps at 5.7 GHz. To help provide high-speed data transmission rates and provide backward compatibility to 802.11 and 802.11b systems, the 802.11g systems was developed that offers 54 Mbps data transmission in the 2.4 GHz range.

Wireless Local Area Network - WLAN Diagram

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Introduction to Wireless LAN - WLAN This book explains the functional parts of a Wireless LAN system, key technologies it uses, and its basic operation. Explained is the basic operation of WLAN systems and how the performance may vary based on a variety of controllable and uncontrollable events. $19.99 Printed, $16.99 eBook9.99 Printed, $16.99 eBook

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