Rockwell Automation 1783-WAPxxx Stratix 5100 Wireless Access Point User Manual - Manual (Page 598)

598 Rockwell Automation Publication 1783-UM006A-EN-P - May 2014
Glossary
receiver sensitivity A measurement of the weakest signal a receiver can receive and still correctly
translate it into data.
RF Radio frequency. A generic term for radio-based technology.
roaming A feature of some Access Points that lets you move through a facility while
maintaining an unbroken connection to the LAN.
RP-TNC A connector type unique to Cisco Aironet radios and antennas. Part 15.203 of
the FCC rules covering spread spectrum devices limits the types of antennas that
can be used with transmission equipment. In compliance with this rule, Cisco
Aironet, like all other wireless LAN providers, equips its radios and antennas
with a unique connector to prevent attachment of non-approved antennas to
radios.
slot time The amount of time a device waits after a collision before retransmitting a packet.
Short slot times decrease the backoff time, that increases throughput.
spread spectrum A radio transmission technology that spreads the user information over a much
wider bandwidth than otherwise required 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.
transmit power The power level of radio transmission.
UNII Unlicensed National Information Infrastructure—regulations for UNII devices
operating in the 5.15…5.35 GHz and 5.725…5.825 GHz frequency bands.
UNII-1 Regulations for UNII devices operating in the 5.15…5.25 GHz frequency band.
UNII-2 Regulations for UNII devices operating in the 5.25…5.35 GHz frequency band.
UNII-3 Regulations for UNII devices operating in the 5.725…5.825 GHz frequency
band.
unicast packet A single data message (packet) sent to a specific IP address.
WDS Wireless Domain Services (WDS). An access point providing WDS on your
wireless LAN maintains a cache of credentials for CCKM-capable client devices
on your wireless LAN. When a CCKM-capable client roams from one access
point to another, the WDS access point forwards the client’s credentials to the
new access point with the multicast key. Only two packets pass between the client
and the new access point, greatly shortening the reassociation time.
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.