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Appendix D: Glossary
802.1Q
Psion Teklogix 9160 G2 Wireless Gateway User Manual D -49
To be compliant with this standard, layer 2 switches must be capable of grouping incoming
LAN packets into separate traffic classes.
802.1Q
IEEE 802.1Q is the IEEE standard for Virtual Local Area Networks ( VLAN s) specific to
wireless technologies. (See
http://www.ieee802.org/1/pages/802.1Q.html
.)
The standard addresses the problem of how to break large networks into smaller parts to
prevent broadcast and multicast data traffic from consuming more bandwidth than is
necessary. 802.11Q also provides for better security between segments of internal networks.
The 802.1Q specification provides a standard method for inserting VLAN membership
information into Ethernet frames.
A
Access Point
An access point is the communication hub for the devices on a WLAN , providing a
connection or bridge between wireless and wired network devices. It supports a Wireless
Networking Framework called Infrastructure Mode .
When one access point is connected to a wired network and supports a set of wireless
stations, it is referred to as a basic service set (
BSS ). An extended service set ( ESS ) is
created by combining two or more BSSs.
Ad hoc Mode
Ad hoc mode is a Wireless Networking Framework in which stations communicate directly
with each other. It is useful for quickly establishing a network in situations where formal
infrastructure is not required.
Ad hoc mode is also referred to as peer-to-peer mode or an independent basic service set
( IBSS ).