User Guide

Glossary
GL-5
Cisco Wireless ISR and HWIC Access Point Configuration Guide
OL-6415-04
roaming
A feature of some Access Points that allows users to move through a facility
while maintaining an unbroken connection to the LAN.
RP-TNC
Reverse Polarity Threaded Neill Concelman connector. Part 15.203 of the FCC
rules covering spread spectrum devices limits the types of antennas that may be
used with transmission equipment. In compliance with this rule, Cisco, like all
other wireless LAN providers, equips its radios and antennas with a unique
connector to prevent attachment of non-approved antennas to radios.
S
slot time
The amount of time a device waits after a collision before retransmitting a
packet. Short slot times decrease the backoff time, which increases throughput.
spread spectrum
A radio transmission technology that spreads the user information over a much
wider bandwidth than otherwise required in order to gain benefits such as
improved interference tolerance and unlicensed operation.
SSID
Service Set Identifier (also referred to as Radio Network Name). A unique
identifier used to identify a radio network and which stations must use to be able
to communicate with each other or to an access point. The SSID can be any
alphanumeric entry up to a maximum of 32 characters.
T
transmit power
The power level of radio transmission.
U
UNII
Unlicensed National Information Infrastructure—regulations for UNII devices
operating in the 5.15 to 5.35 GHz and 5.725 to 5.825 GHz frequency bands.
UNII-1
Regulations for UNII devices operating in the 5.15 to 5.25 GHz frequency band.
UNII-2
Regulations for UNII devices operating in the 5.25 to 5.35 GHz frequency band.
UNII-3
Regulations for UNII devices operating in the 5.725 to 5.825 GHz frequency
band.
unicast packet
A single data message (packet) sent to a specific IP address.
W
WEP
Wired Equivalent Privacy. An optional security mechanism defined within the
802.11 standard designed to make the link integrity of wireless devices equal to
that of a cable.