IEEE standards for Wireless LAN (WLAN)?
IEEE standards for Wireless LAN (WLAN)?
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Institute of Electrical and Electronic Engineers (IEEE) is a society of technical professionals. It promotes the development and application of electro-technology and allied sciences. IEEE develops communications and network standards, among other activities. The organization publishes a number of journals, have many local chapters, and societies in specialized areas.
Wireless Local Area Network (WLAN) is a network that enables devices to connect to the network wirelessly. WLAN uses radiated energy, commonly called high-frequency radio waves, to communicate amongst nodes. IEEE defines standards for WLAN through 802.11 family.
Various standards defined by IEEE are described below:
The IEEE 802.11 standards define wireless local area network (WLAN) computer communication in the 5GHz and 2.4GHz public spectrum bands. These specifications define an over-the-air interface between a wireless client and a base station or access point. The 802.11 specifications also define standards among wireless clients. These specifications address both the Physical (PHY) and Media Access Control (MAC) layers and are tailored to resolve compatibility issues between manufacturers of wireless LAN equipment.
The IEEE 802.11a standard for WLAN uses the U-NII spectrum at 5GHz. It uses Orthogonal Frequency Division Multiplexing (OFDM) encoding class. The maximum speed supported by 802.11a standard is 54Mbps.
The 802.11b standard, defined by IEEE, is an extension of the 802.11 standard of wireless network. It is also referred to as 802.11 High Rate or Wi-Fi. It operates in 2.4GHz band and brings data rates up to 11Mbps.
The 802.11g standard, defined by IEEE, is an extension to the 802.11b standard of wireless network. It operates in 2.4-GHz band and brings data rates up to 54Mbps using Orthogonal Frequency-Division Multiplexing (OFDM) technology. Since the 802.11g standard is backward compatible with 802.11b, an 802.11b device can interface directly with an 802.11g access point.
The 802.11i standard of IEEE specifies security mechanism for Wireless LAN (WLAN). The standards include authentication and encryption.
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