Glossary - 3
F
File Transfer Protocol (FTP). A TCP/IP application protocol governing file transfer via network or telephone lines. See
TCP/IP.
FTP. See File Transfer Protocol.
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.
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.
High-Speed Downlink Packet Access (HSDPA). A 3G (third generation) mobile telephony communications protocol in the
High-Speed Packet Access (HSPA) family, which allows networks based on Universal Mobile Telecommunications
System (UMTS) to have higher data transfer speeds and capacity.
I
Interleaved 2 of 5. A binary bar code symbology representing character pairs in groups of five bars and five interleaved
spaces. Interleaving provides for greater information density. The location of wide elements (bar/spaces) within each
group determines which characters are encoded. This continuous code type uses no intercharacter spaces. Only
numeric (0 to 9) and START/STOP characters may be encoded.
Internet Protocol Address. See IP.
IP. Internet Protocol. The IP part of the TCP/IP communications protocol. IP implements the network layer (layer 3) of the
protocol, which contains a network address and is used to route a message to a different network or subnetwork. IP
accepts “packets” from the layer 4 transport protocol (TCP or UDP), adds its own header to it and delivers a “datagram”
to the layer 2 data link protocol. It may also break the packet into fragments to support the maximum transmission unit
(MTU) of the network.
IP Address. (Internet Protocol address) The address of a computer attached to an IP network. Every client and server
station must have a unique IP address. A 32-bit address used by a computer on a IP network. Client workstations have
either a permanent address or one that is dynamically assigned to them each session. IP addresses are written as four
sets of numbers separated by periods; for example, 204.171.64.2.
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