802.11 - The alphabet
802.11 is perhaps the fastest-changing network protocol around. We've gathered a wealth of
information to get you up-to-speed quickly on the various specifications.
TABLE OF CONTENTS
802.11 Quick Start
What about security?
Enterprise role models - Who's really using 802.11?
Articles and White Papers
- 802.11a -
an extension to 802.11 that applies to wireless LANs and provides up to 54 Mbps in the 5 GHz band.
802.11a uses an orthogonal
frequency division multiplexing encoding scheme rather than FHSS or DSSS.
- 802.11b -
(also referred to as 802.11 High Rate or Wi-Fi) -- an extension to 802.11 that applies to wireless
LANS and provides 11 Mbps transmission in the 2.4 GHz band. 802.11b was a 1999 ratification to the
original 802.11 standard, allowing wireless functionality comparable to Ethernet.
- 802.11d -
a wireless network communications specification for use in countries where systems
using other standards in the 802.11 family are not allowed to operate.
- 802.11e -
a proposed enhancement to the 802.11a and 802.11b wireless LAN (WLAN) specifications. It offers quality of service (QoS) features, including the prioritization of data, voice, and video
- 802.11g -
offers transmission over relatively short distances at up to 54 megabits per second (Mbps), compared with the 11 Mbps theoretical maximum with the earlier 802.11b standard.
- 802.11h - intended to resolve interference issues introduced by the use of 802.11a in some locations, particularly with military radar systems and medical
- 802.11i - an enhancement to 802.11 that offers additional security for WLAN
- 802.11j - Japanese regulatory extensions to 802.11a specification.
- 802.11k - a proposed standard for how a wireless local area network (WLAN) should perform channel selection, Roaming, and transmit power control (TPC) in order to optimize network
- 802.11m - an initiative to perform editorial maintenance, corrections,
improvements, clarifications, and interpretations relevant to documentation for 802.11 family specifications.
(Wi-Fi) Networking Handbook - Chapter 9 - covers the essentials of wireless LANs, including
benefits and risks; the major threats to a wireless network; and the breadth and scope of possible
attacks and exploits that are available to hackers.
Security: Attacks and risks - this chapter advocates that the more you know about the risks
involved in your network the better your chances are of protecting yourself, your assets, and your
This was first published in January 2006