Glossary - 3
E
EAN. European Article Number. This European/International version of the UPC provides its own coding format and
symbology standards. Element dimensions are specified metrically. EAN is used primarily in retail.
ESD. Electro-Static Discharge
EAP. Short for Extensible Authentication Protocol, EAP is defined in RFC 3748 and is a general authentication protocol
commonly used with PPP and wireless networks.
F
File Transfer Protocol (FTP). A TCP/IP application protocol governing file transfer via network or telephone lines. See
TCP/IP.
Flash Memory. Flash memory is nonvolatile, semi-permanent storage that can be electronically erased in the circuit
and reprogrammed.
FHSS (Frequency Hopping Spread Spectrum). A method of transmitting radio signals by rapidly switching a carrier
among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver.
G
GPS (Global Positioning System). A satellite-based navigation system made up of a network of 24 satellites. GPS
satellites circle the earth and transmit signal information to earth. GPS receivers take this information and use
triangulation to calculate the user's exact location.
Gateway. a gateway is an address used as an entry point into another network. For example: 166.70.10.1 could be used
as a gateway. It is common for an IP address ending with.1 and.2 to be a network's gateway. The gateway is
commonly the address of a network device such as a network router.
H
Hz. Hertz; A unit of frequency equal to one cycle per second.
Host Computer. A computer that serves other terminals in a network, providing such services as computation,
database access, supervisory programs and network control.
I
IEC. International Electrotechnical Commission. This international agency regulates laser safety by specifying various
laser operation classes based on power output during operation.
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