the profession. The IEEE fosters the development of standards that often become
national and international standards.
Infrastructure:
An infrastructure network is a wireless network or other small
network in which the wireless network devices are made a part of the network through
the Access Point which connects them to the rest of the network.
ISM Band:
The FCC and their counterparts outside of the U.S. have set aside
bandwidth for unlicensed use in the ISM (Industrial, Scientific and Medical) band.
Spectrum in the vicinity of 2.4GHz, in particular, is being made available worldwide.
MAC Address:
Media Access Control Address is a unique hex number assigned by
the manufacturer to any Ethernet networking device, such as a network adapter, that
allows the network to identify it at the hardware level.
Multicasting:
Sending data to a group of nodes instead of a single destination.
Multiple Bridge
– One of the additional AP operating modes offered by 54Mbps
Access Point, which allows a group of APs that consists of two or more APs to
connect two or more Ethernet networks or Ethernet enabled clients together. The way
that multiple bridge setups is based on the topology of Ad-Hoc mode.
Node:
A network junction or connection point, typically a computer or workstation.
Packet:
A unit of data routed between an origin and a destination in a network.
PLCP:
Physical layer convergence protocol
PPDU:
PLCP protocol data unit
Preamble Type:
During transmission, the PSDU shall be appended to a PLCP
preamble and header to create the PPDU. Two different preambles and headers are
defined as the mandatory supported long preamble and header which interoperates
with the current 1 and 2 Mbit/s DSSS specification as described in IEEE Std
802.11-1999, and an optional short preamble and header. At the receiver, the PLCP
preamble and header are processed to aid in demodulation and delivery of the PSDU.
The optional short preamble and header is intended for application where maximum
throughput is desired and interoperability with legacy and non-short-preamble capable
equipment is not consideration. That is, it is expected to be used only in networks of
like equipment that can all handle the optional mode. (IEEE 802.11b standard)
PSDU:
PLCP service data unit
Roaming:
A LAN mobile user moves around an ESS and enjoys a continuous
connection to an Infrastructure network.
RTS: R
equest
T
o
S
end. An RS-232 signal sent from the transmitting station to the
receiving station requesting permission to transmit.
RTS Threshold:
Transmitters contending for the medium may not be aware of each
other. RTS/CTS mechanism can solve this “Hidden Node Problem”. If the packet size
is smaller than the preset RTS Threshold size, the RTS/CTS mechanism will NOT be
