Glossary - Toshiba GN-1041 Operator's Manual

2. Appendix

Glossary

Ad Hoc
System to communicate directly between each wireless device without an Access Pos-
int.
AP (Access Point)
Access points serve as the bridge between wired networks and wireless networks, as
well as providing bridge functions between segments and IP tunnel functions indispens-
able to the building of versatile, large-scale networks.
Bridge
A device for relaying between LAN's. The bridge determines whether to relay data
based on the address of the computer to which the data is being sent. It can be used to
connect networks having different protocols, or when data for broadcast to all comput-
ers is received, can send this to all connected networks.
Channel
This term has the same meaning as a television or radio channel. In the 2.400 to
2.472GHz ISM band used by this product, the IEEE 802.11 standard provides for divi-
sion into 11 channels numbered 1 to 11. Even on the same network, wireless devices
operating on different channels cannot communicate with each other.
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
CSMA is a method of avoiding collision by which wireless terminals listen before trans-
mitting and do not transmit if they can hear transmissions from other wireless terminals.
CSMA/CA is CSMA plus additional collision avoidance functions.
DS (Direct Sequence)
A type of spectrum diffusion signal using narrow band modulation with phase modula-
tion, in which the diffusion is by means of phase modulation using a broad band diffu-
sion signal (pseudo random strings).
ESS ID (Extended Service Set ID)
The ESS ID is similar to a name assigned to the wireless LAN network to which a unit
belongs. Communication between wireless terminals which have different names can-
not be performed.
Wireless network can be partitioned by using different ESS ID names.
IEEE (Institute of Electrical Electronics Engineers)
"I-triple-E," involved in a wide range of fields from communications and computer to
medicine and biology, with primary activities related to publishing articles and sponsor-
ing conferences, but also recommending and setting of standards.
The organization sponsoring Committee 802 which is responsible for LAN related mat-
ters.
IEEE 802.11b/IEEE 802.11g
The wireless LAN standard established by the IEEE.
Infrastructure
System to integrate wireless LAN with wired LAN
LAN (Local Area Network)
A network configured from mutual connections between computers within a limited
area.
Also called an "intranet" or "business or regional data communications network."
50 GN-1041 Operator's Manual — Glossary