IronPort Systems ZyAIR B-4000 - Manual (Page 228)

ZyAIR B-4000 Hot Spot Gateway
Wireless LAN and IEEE 802.11 C-2
Spread Spectrum (DSSS) and Frequency-Hopping Spread Spectrum (FHSS), in the 2.4 to 2.4825 GHz
unlicensed ISM (Industrial, Scientific and Medical) band. The third method is infrared technology, using
very high frequencies, just below visible light in the electromagnetic spectrum to carry data.
Ad-hoc Wireless LAN Configuration
The simplest WLAN configuration is an independent (Ad-hoc) WLAN that connects a set of computers
with wireless nodes or stations (STA), which is called a Basic Service Set (BSS). In the most basic form, a
wireless LAN connects a set of computers with wireless adapters. Any time two or more wireless adapters
are within range of each other, they can set up an independent network, which is commonly referred to as
an Ad-hoc network or Independent Basic Service Set (IBSS). See the following diagram of an example of
an Ad-hoc wireless LAN.
Diagram C-1 Peer-to-Peer Communication in an Ad-hoc Network