802.11d facilitates global roaming.Ī proposed adaptation to the 802.11a and 802.11b specifications that enhances the 802.11 Media Access Control layer (MAC layer) with a coordinated time division multiple access (TDMA) construct, and adds error-correcting mechanisms for delay-sensitive applications such as voice and video. Rules subject to variation include allowed frequencies, allowed power levels, and allowed signal bandwidth. Configuration can be fine-tuned at the Media Access Control layer (MAC layer) level to comply with the rules of the country or district in which the network is to be used.
#MAC IS THE ACRONYM FOR MULTIMEDIA ACCESS CONTROLLER CODE#
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.Ī wireless network communications specification for use in countries where systems using other standards in the 802.11 family are not allowed to operate. WLAN standard often called Wi-Fi backward compatible with 802.11. The specification uses a modulation scheme known as orthogonal frequency-division multiplexing (OFDM) that is especially well suited to use in office settings. Networks using 802.11a operate at radio frequencies in the 5GHz band. Provides specifications for wireless systems. 802.11 standards use the Ethernet protocol and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing. Table 180 List of terms (Continued)Īn evolving family of specifications for wireless LANs developed by a working group of the Institute of Electrical and Electronics Engineers (IEEE). The following table lists the terms and their definitions used in this guide. Wireless internet service provider roaming Unscheduled automatic power save delivery Universal mobile telecommunication systems Remote authentication dial-in user service Orthogonal frequency division multiplexing Microsoft Challenge Handshake Authentication Protocol Lightweight Extensible Authentication Protocol Internet Security Association and Key Management Protocol
Institute of Electrical and Electronics Engineer Table 179 List of acronyms (Continued)Ĭhallenge Handshake Authentication ProtocolĬarrier sense multiple access with collision avoidance The following table lists the acronyms and their definitions used in this guide.
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