User Manual

Appendix E: Glossary
DTIM
E-10
Psion Teklogix 9160 Wireless Gateway User Manual
DTIM
The Delivery Traffic Information Map (DTIM) message is an element included in
some Beacon frames. It indicates which stations, currently sleeping in low-power
mode, have data buffered on the Access Point awaiting pick-up. Part of the DTIM
message indicates how frequently stations must check for buffered data.
Dynamic IP Address
See IP Address.
E
EAP
The Extensible Authentication Protocol (EAP) is an authentication protocol that
supports multiple methods, such as token cards, Kerberos, one-time passwords,
certificates, public key authentication, and smart cards.
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.