User's Manual

Part # 34357-MNL Rev.03 SPEEDLAN 9200 User Guide
Glossary-2
Glossary for Standard Data Communications
Advanced Encryption Standard (AES)
Advanced Encryption Standard was adopted by the National Institute of Standards and Technology in
October of 2000. AES presents a new level in computer networking security, especially important in wireless
communications because wireless circuits are easier to tap than their hard-wired counterparts. AES is more
difficult to crack than its predecessor Data Encryption Standard. SPEEDLAN 9200 products use an AES
128-bit encryption key.
Address Resolution Protocol (ARP)
ARP is the abbreviation for Address Resolution Protocol, which maps an IP address to a machine's hardware
address. Network administrators use ARP to locate systems on the LAN that are configured with incorrect IP
addresses.
Alignment
In order to create a successful link, all related equipment should be associated to its respective attachments
or equipment.
Amplitude
The magnitude of a waveform when measured from the mid-point to the peak of the wave.
Analog
A signal in the form of a continuously varying quantity such as voltage, frequency or phase.
Antenna
Device used to concentrate and direct the energy of a signal into a tight beam. Parabolic or dish, grid, and
Yagi are different varieties of antennas.
Antenna Gain
The ratio of the power radiated by an antenna in a specific direction versus the power required to produce
this same strength if an isotropic antenna were used.
Attenuation
The measure of the loss of power in a microwave signal as it travels between two points. It is measured in
decibels (dB).
Attenuator
A device used to reduce the RF signal level.