Users Guide

Term Definition
IR wireless The use of wireless technology in devices or systems that convey data
through infrared (IR) radiation. Infrared is electromagnetic energy at a
wavelength or wavelengths somewhat longer than those of red light.
The shortest-wavelength IR borders visible red in the electromagnetic
radiation spectrum; the longest-wavelength IR borders radio waves.
microwave Electromagnetic energy having a frequency higher than 1 gigahertz
(billions of cycles per second), corresponding to wavelength shorter
than 30 centimeters. Microwave signals propagate in straight lines
and are affected very little by the troposphere. They are not refracted
or reflected by ionized regions in the upper atmosphere. Microwave
beams do not readily diffract around barriers such as hills, mountains,
and large human-made structures.
MIMO An antenna technology for wireless communications in which multiple
antennas are used at both the source (transmitter) and the destination
(receiver). The antennas at each end of the communications circuit
are combined to minimize errors and optimize data speed. MIMO is
one of several forms of smart antenna technology, the others being
MISO (multiple input, single output) and SIMO (single input, multiple
output).
MISO An antenna technology for wireless communications in which multiple
antennas are used at the source (transmitter). The antennas are
combined to minimize errors and optimize data speed. The
destination (receiver) has only one antenna. MISO is one of several
forms of smart antenna technology, the others being MIMO (multiple
input, multiple output) and SIMO (single input, multiple output).
near field communication
(NFC)
A short-range wireless connectivity standard (Ecma-340, ISO/IEC
18092) that uses magnetic field induction to enable communication
between devices when they're touched together, or brought within a
few centimeters of each other. The standard specifies a way for the
devices to establish a peer-to-peer (P2P) network to exchange data.
optical wireless The combined use of conventional radio-frequency (RF) wireless and
optical fiber for telecommunication. Long-range links are provided by
optical fiber and links from the long-range end-points to end users are
accomplished by RF wireless or laser systems. RF wireless at ultra-high
frequencies (UHF) and microwave frequencies can carry broadband
signals to individual computers at substantial data speeds.
OCSP Client The ArubaOScontroller can act as an OCSP client and issues OCSP
queries to remote OCSP responders located on the intranet or
Internet.
OCSP Responder The OCSP client retrieves certificate revocation status from an OCSP
responder. The responder may be the certificate authority (CA) that
has issued the certificate in question or it may be some other
designated entity which provides the service on behalf of the CA.
radio frequency (RF) Portion of electromagnetic spectrum in which electromagnetic waves
are generated by feeding alternating current to an antenna.
Dell Networking W-Series ArubaOS 6.4.x | User Guide Acronyms and Terms | 1172