Glossary - 5
Host Computer. A computer that serves other terminals in a network, providing such services as computation,
database access, supervisory programs and network control.
I
IDE. Intelligent drive electronics. Refers to the solid-state hard drive type.
IEC. International Electrotechnical Commission. This international agency regulate s laser safety by spec ifying various
laser operation classes based on power output during operation.
IEC (825) Class 1. This is the lowest power IEC laser classification. Conformity is ensured through a software restriction
of 120 seconds of laser op eration within any 1000 second window and an au tomatic laser shutdown if the scanner's
oscillating mirror fails.
IEEE Address. See MAC Address.
Input/Output Ports. I/O ports are primarily dedicated to passing information into or out of the terminal’s memory. Series
9000 mobile computers include Serial and USB ports.
Interleaved 2 of 5. A binary bar code symbo l ogy re pr esenting character pairs in group s of five bars an d 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.
Intercharacter Gap. The space between two adjacent bar code characters in a discrete code.
Interleaved Bar Code. A bar code in which char acters are paire d to ge th e r, us ing bar s to re pr es en t the first character
and the intervening spaces to re present the second.
Internet Protocol Address. See IP.
IOCTL. Input/Output Control.
I/O Ports. interface The connection between two devices, defined by common physical characteristics, signal
characteristics, and signal meanings. Types of interface s include RS-232 and PCMCIA.
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. (Inter net Protocol ad dress) The ad dress of a computer attached to an IP network. Every clien t 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.
IPX/SPX. Internet Package Exchange/Sequential Packet Exchange. A communications protocol fo r Nov ell. IPX is
Novell’s Layer 3 protocol, similar to XNS and IP, and used in NetWare networks. SPX is Novell's version of the Xerox
SPP protocol.