Dell W-IAP103 Guide de l'utilisateur télécharger pdf (Page 573)

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573 | Terminology Dell Networking W-Series Instant 6.4.0.2-4.1 | CLI Reference Guide

Abbreviation Expansion

PEAP Protected Extensible Authentication Protocol

PEM Privacy Enhanced Mail

PoE Power over Ethernet

RADIUS Remote Authentication Dial In User Service

VC Virtual Controller

VSA Vendor-Specific Attributes

WLAN Wireless Local Area Network

Table 11:

List of abbreviations

Glossary

The following table lists the terms and their definitions used in this document.

Term Definition

802.11 An evolving family of specifications for wireless LANs developed by a

working group of the Institute of Electrical and Electronics Engineers

(IEEE). 802.11 standards use the Ethernet protocol and CSMA/CA (carrier

sense multiple access with collision avoidance) for path sharing.

802.11a Provides specifications for wireless systems. Networks using 802.11a

operate at radio frequencies in the 5GHz band. The specification uses a

modulation scheme known as orthogonal frequency-division multiplexing

(OFDM) that is especially well suited to use in office settings. The

maximum data transfer rate is 54 Mbps.

802.11b WLAN standard often called Wi-Fi; backward compatible with 802.11.

Instead of the phase-shift keying (PSK) modulation method historically

used in 802.11 standards, 802.11b uses complementary code keying

(CCK), which allows higher data speeds and is less susceptible to

multipath-propagation interference. 802.11b operates in the 2.4 GHz band

and the maximum data transfer rate is 11 Mbps.

802.11g Offers transmission over relatively short distances at up to 54 Mbps,

compared with the 11 Mbps theoretical maximum of 802.11b. 802.11g

operates in the 2.4 GHz band and employs orthogonal frequency division

multiplexing (OFDM), the modulation scheme used in 802.11a, to obtain

higher data speed. Computers or terminals set up for 802.11g can fall

back to speeds of 11 Mbps, so that 802.11b and 802.11g devices can be

compatible within a single network.

802.11n Wireless networking standard to improve network throughput over the two

previous standards 802.11a and 802.11g with a significant increase in the

maximum raw data rate from 54 Mbps to 600 Mbps with the use of four

spatial streams at a channel width of 40 MHz. 802.11n operates in the 2.4

and 5.0 bands.

Table 12:

List of Terms

1 2 ... 568 569 570 571 572 573 574 575 576

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