April 2012
Intermediate to advanced
144 pages
4h 34m
English
Content preview from 802.11n: A Survival GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Glossary
- ACK
Abbreviation for “Acknowledgement.” ACKs are used extensively in 802.11 to provide reliable data transfers over an unreliable medium. For more details, see “Contention-Based Data Service” in Chapter 3 of 802.11 Wireless Networks: The Definitive Guide.
See Also Block ACKImplicit Feedback
- AES
Advanced Encryption Standard. A cipher selected by NIST to replace the older Data Encryption Standard (DES) in 2001 after a five-year evaluation. AES is a 128-bit block cipher which uses either 128-, 192-or 256-bit keys. It has been widely adopted by many protocols requiring the use of a block cipher, including CCMP in 802.11, though CCMP uses only 128-bit keys. AES is specified in FIPS Publication 197.
- AP
Access Point. Bridge-like device that attaches wireless 802.11 stations to a wired backbone network. For more information on the general structure of an access point, see Chapter 20 of 802.11 Wireless Networks: The Definitive Guide.
- AS
Authentication Server. The network service that validates user credentials. Usually RADIUS in 802.11 networks.
- Basic Block ACK
The original block acknowledgement specification in the 802.11e amendment allowed a receiver of a group of frames to selectively acknowledge individual 802.11 fragments. Extensions in 802.11n make the protocol more efficient for use with 802.11n networks.
See Also Compressed Block ACK
- basic service set
See BSS
- beamforming
A method of using precise phase shifts on an antenna array that focuses the resulting transmission in a particular direction. ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.