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Appendix D: Glossary
EDCF
Psion Teklogix 9160 G2 Wireless Gateway User Manual D -55
Variations on EAP include EAP Cisco Wireless (LEAP), Protected EAP (PEAP), EAP-TLS,
and EAP Tunnelled TLS (EAP-TTLS).
EDCF
Enhanced Distribution Control Function is an extension of DCF . EDCF, a component of
the IEEE Wireless Multimedia (WMM) standard, provides prioritized access to the wireless
medium.
ESS
An extended service set (ESS) is an Infrastructure Mode Wireless Networking Framework
with multiple access points, forming a single subnetwork that can support more clients than
a basic service set (
BSS ). Each access point supports a number of wireless stations,
providing broader wireless coverage for a large space, for example, an office.
Ethernet
Ethernet is a local-area network ( LAN ) architecture supporting data transfer rates of 10
Mbps to 1 Gbps. The Ethernet specification is the basis for the IEEE 802.3 standard, which
specifies the physical and lower software layers. It uses the CSMA/CA access method to
handle simultaneous demands.
Ethernet supports data rates of 10 Mbps, Fast Ethernet supports 100 Mbps, and Gigabit
Ethernet supports 1 Gbps. Its cables are classified as “ X base Y ”, where X is the data rate in
Mbps and Y is the category of cabling. The original cable was 10base5 (Thicknet or “Yellow
Cable”). Some others are 10base2 (Cheapernet), 10baseT (Twisted Pair), and 100baseT
(Fast Ethernet). The latter two are commonly supplied using CAT5 cabling with RJ-45
connectors. There is also 1000baseT (Gigabit Ethernet).
ERP
The Extended Rate Protocol refers to the protocol used by IEEE 802.11g stations (over 20
Mbps transmission rates at 2.4GHz) when paired with Orthogonal Frequency Division
Multiplexing (OFDM). Built into ERP and the IEEE
802.11g standard is a scheme for
effective interoperability of IEEE 802.11g stations with IEEE 802.11b nodes on the same
channel.