Wireless Technology Glossary
Access point A transceiver in wireless
Amplifier An electrical device which strengthens the power or gain of
a wireless signal in order to send a signal over longer distances.
Bridge A network hardware-software device for wireless connection of
geographically remote sites.
Directional Antenna An antenna with a radiation pattern that
concentrates both the transmitting and receiving signal power into one favored
Fresnel Zone An extra clearance zone around and in addition to the
the visual line-of-sight path.
Hardware Any equipmentsuch as a personal computer, server, printer,
scanner, etc.that can be connected to other equipment or to a computer
Hub Network hardware via which other hardware is connected to a
Line-of-Sight The presence of an unobstructed visual path with a
clear Fresnel zone between two wireless devices. Both a visual path and a
clear Fresnel zone are needed to have a clear wireless line-of-sight path.
Network Adapter Equipment used to connect hardware to a computer
Network Card The same as a network adapter.
Omni-Directional Antenna An antenna with a radiation pattern that,
when viewed from above, is equally strong in all directions.
Panel Antenna A directional antenna with a flat reflector.
Parabolic Antenna A directional antenna made up of a dipole element
mounted in front of a parabolic-shaped reflector.
Repeater A device used to increase the power of a signal transmitted
to an adjacent segment of a computer network or communications bridge.
Router A network hardware-software device that links two or more
Switch Network hardware used to automatically control data traffic in
Acronyms and Abbreviations
ACK ACKnowledge A transmission control
character transmitted by the receiving station as an affirmative response to
the sending station.
CCK Complementary Code Keying A modulation scheme used with
CSMA/CA Carrier Sense Multiple Access/Collision Avoidance A
protocol for carrier transmission that prevents collisions before they happen.
CSMA/CD Carrier Sense Multiple Access/Collision Detect A protocol
for carrier transmission that interrupts data transmission when a collision is
DBPSK Differential Binary Phase Shift Keying A modulation scheme
used with wireless networks.
DQPSK Differential Quadrature Phase Shift Keying A modulation
scheme used with wireless networks.
DSSS Direct Sequence Spread Spectrum A physical media that uses a
chipping technique to spread modulated data across the spectrum.
LAN Local area network.
NAK Negative Acknowledgement A transmission control character sent
by a station as a negative response to the station with which the connection
has been set up.
MMDS Multi-Channel Multi-Point Distribution System A broadband
communications service that operates in the ultra-high-frequency (UHF) portion
of the radio spectrum.
WEP Wired Equivalent Privacy A security protocol that is designed
to provide a wireless local area network with a level of security and privacy
comparable to what is usually expected of a wired LAN.
WLAN Wireless local area network.