User's Manual Part 5

Access / One
®
Network
Glossary of Terms 191
GL
FHSS
(Frequency-Hopping Spread-Spectrum) One of two types of spread-spectrum
radio technology used in wireless LAN (WLAN) transmissions. The FHSS
technique modulates the data signal with a narrowband carrier signal that
“hops” in a predictable sequence from frequency to frequency as a function of
time over a wide band of frequencies. Interference is reduced, because a
narrowband interferer affects the spread-spectrum signal only if both are
transmitting at the same frequency at the same time. The transmission
frequencies are determined by a spreading (hopping) code. The receiver must
be set to the same hopping code and must listen to the incoming signal at the
proper time and frequency to receive the signal.
FTP
(File Transfer Protocol) A TCP/IP based protocol for file transfer. FTP is defined
by RFC 959.
GMK
(Group Master Key) A cryptographic key used to derive a group transient key
(GTK) for the Temporal Key Integrity Protocol (TKIP) and Advanced Encryption
Standard (AES). See also, GTK and TKIP.
GTK
(Group Transient Key) A cryptographic key used to encrypt broadcast and
multicast packets for transmissions using the Temporal Key Integrity Protocol
(TKIP) and Advanced Encryption Standard (AES). See also, TKIP.
HiperLAN
(High Performance Radio Local Area Network) A set of wireless LAN (WLAN)
communication standards used primarily in European countries and adopted by
the European Telecommunications Standards Institute (ETSI).
homologation
The process of certifying a product or specification to verify that it meets
regulatory standards.