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J

J


jabber

1. Error condition in which a network device continually transmits random, meaningless data onto the network.

2. In IEEE 802.3, a data packet whose length exceeds that prescribed in the standard.

JANET

Joint Academic Network. X.25 WAN connecting university and research institutions in the United Kingdom.

Japan UNIX Network

See JUNET.

Java

Object-oriented programming language developed at Sun Microsystems to solve a number of problems in modern programming practice. The Java language is used extensively on World-Wide Web, particularly for applets.

JDBC

Java Database Connectivity. Java API that enables Java programs to execute SQL statements. This allows Java programs to interact with any SQL-compliant database. Since nearly all relational database management systems (DBMSs) support SQL, and because Java itself runs on most platforms, JDBC makes it possible to write a single database application that can run on different platforms and interact with different DBMSs. JDBC is similar to ODBC, but is designed specifically for Java programs, whereas ODBC is language-independent. JDBC was developed by JavaSoft, a subsidiary of Sun Microsystems. See ODBC.

jitter

Analog communication line distortion caused by the variation of a signal from its reference timing positions. Jitter can cause data loss, particularly at high speeds.

John von Neumann Computer Network

See JvNCnet.

Joint Academic Network

See JANET.

JPEG

Joint Photographics Expert Group. Graphic file format that was adopted as a standard by the ITU-T and the ISO. JPEG is most often used to compress still images using DCT analysis.

jumper

Electrical switch consisting of a number of pins and a connector that can be attached to the pins in a variety of different ways. Different circuits are created by attaching the connector to different pins.

JUNET

Japan UNIX Network. Nationwide, noncommercial network in Japan, designed to promote communication between Japanese and other researchers.

JvNCnet

John von Neumann Computer Network. Regional network, owned and operated by Global Enterprise Services, Inc., composed of T1 and slower serial links providing midlevel networking services to sites in the Northeastern United States.





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Posted: Tue Sep 21 15:11:42 PDT 1999
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