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Configuration:
Basic Gateway TCP/IP Wireless USB
SBG940 User Guide
119
F
G
FCS
frame check sequence
F-type
connector
A type of connector used to connect coaxial cable to equipment such as the SBG940.
firewall
A security software system on the SBG940 that enforces an access control policy between the
Internet and the SBG940 LAN.
flow
A data path moving in one direction.
FEC
Forward error correction is a technique to correct transmission errors without requiring the transmitter
to resend any data.
FDMA
Frequency Division Multiple Access is a method to allow multiple users to share a specific radio
spectrum. Each active user is assigned an individual RF channel (or carrier) with the carrier frequency
of each channel offset from its adjacent channels by an amount equal to the channel spacing, which
allows the required bandwidth per channel.
frame
A unit of data transmitted between network nodes that contains addressing and protocol control data.
Some control frames contain no data.
frequency
Number of times an electromagnetic signal repeats an identical cycle in a unit of time, usually one
second, measured in Hz, kHz, MHz, or GHz.
FTP
File Transfer Protocol is a standard Internet protocol for exchanging files between computers. FTP is
commonly used to download programs and other files to a computer from web pages on Internet
servers.
full-duplex
The ability to simultaneously transmit and receive data. See also
half-duplex
.
gain
The extent to which a signal is boosted. A high gain antenna increases the wireless signal level to
increase the distance the signal can travel and remain usable.
gateway
A device that enables communication between networks using different protocols. See also
router.
The SBG940 enables up to 253 computers supporting IEEE 802.11b, Ethernet, or USB to share a
single broadband Internet connection.
gateway IP
address
The address of the default gateway router on the Internet. Also known as the “giaddr.”
GHz
Gigahertz — one billion cycles per second.
GUI
graphical user interface
