Glossary
GL-3
Cisco Aironet 1400 Series Wireless Bridge Hardware Installation Guide. OL-4072-03
OL-4072-04
G
gateway A device that connects two otherwise incompatible networks.
GHz Gigahertz. One billion cycles per second. A unit of measure for frequency.
I
IEEE Institute of Electrical and Electronic Engineers. A professional society serving electrical engineers
through its publications, conferences, and standards development activities. The body responsible
for the Ethernet 802.3 and wireless LAN 802.11 specifications.
infrastructure The wired Ethernet network.
IP address The Internet Protocol (IP) address of a station.
IP subnet mask The number used to identify the IP subnetwork, indicating whether the IP address can be
recognized on the LAN or if it must be reached through a gateway. This number is expressed in a
form similar to an IP address, such as 255.255.255.0.
isotropic An antenna that radiates its signal in a spherical pattern.
M
MAC Media Access Control address. A unique 48-bit number used in Ethernet data packets to identify
an Ethernet device, such as a bridge.
modulation Any of several techniques for combining user information with a transmitter’s carrier signal.
multipath The echoes created as a radio signal bounces off physical objects.
multicast packet A single data message (packet) sent to multiple addresses.
N
non-root bridge A wireless transceiver connected to a remote Ethernet network that communicates only with
another wireless transceiver connected to the main Ethernet network.
O
omni-directional A primarily circular antenna radiation pattern.
Orthogonal Frequency
Division Multiplex
(OFDM)
A modulation technique used by IEEE 802.11a-compliant wireless LANs for transmission at 6, 9,
12, 18, 24, 36, 48, and 54 Mbps.