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IP See Internet Protocol.

IP address An address used by the Internet Protocol that identifies the device’s location on the network.

ipconfig A Windows NT utility used to display that machine’s current configuration.

IP proxy All communications look as if they originated from a proxy server because the IP address of the user making a request is hidden. Also known as Network Address Translation (NAT).

IP spoofing A hacker trying to gain access to a network by pretending his or her machine has the same network address as the internal network.

IPX See Internetwork Packet eXchange.

IPX network address A number that represents an entire network. All servers on the network must use the same external network number.

ISDN See Integrated Services Digital Network.

ISDN terminal adapter The device used on ISDN networks to connect a local network (or single machine) to an ISDN network. It provides power to the line as well as translates data from the LAN or individual computer for transmission on the ISDN line. See also Integrated Services Digital Network.

ISP See Internet service provider.

Java A programming language, developed by Sun Microsystems, that is used to write programs that will run on any platform that has a Java Virtual Machine installed.

Java Virtual Machine (JVM) Software, developed by Sun Microsystems, that creates a virtual Java computer on which Java programs can run. A programmer writes a program once without having to recompile or rewrite the program for all platforms.

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