THE WHATIS.COM WORD-OF-THE-DAY October 16, 2002 connectionless ______________ TODAY'S SPONSOR: Postmaster Direct
Sign up today to receive free information and offers about computers, networking, wireless devices, security, and other timely IT topics. Choose the specific topics you would like to learn more about. Visit http://whatis.techtarget.com/postmasterDirect/ ______________ TODAY'S WORD: connectionless See our definition with hyperlinks at http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci856314,00.html In telecommunication, connectionless describes communication between two network end points in which a message can be sent from one end point to another without prior arrangement. The device at one end of the communication transmits data to the other, without first ensuring that the recipient is available and ready to receive the data. The device sending a message simply sends it addressed to the intended recipient. If there are problems with the transmission, it may be necessary to resend the data several times. The Internet Protocol (IP) and User Datagram Protocol (UDP) are connectionless protocols. The other method of transmitting data is the connection-oriented approach, in which the devices use a preliminary protocol to set up an end-to-end connection before any data can be sent. Connection-oriented protocol service is sometimes called a "reliable" network service, because it guarantees that data will arrive in the proper sequence. For connection-oriented communications, each end point must be able to transmit so that it can communicate. Transmission Control Protocol (TCP) is a connection-oriented protocol. Connectionless protocols are usually described as stateless because each end has no protocol-defined way to remember where they are in a "conversation" of message exchanges. Connection-oriented protocols are sometimes described as stateful because they can keep track of a conversation. RELATED TERMS: Internet Protocol http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci214031,00.html User Datagram Protocol http://searchwebservices.techtarget.com/sDefinition/0,,sid26_gci214157,00.html Transmission Control Protocol http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci214172,00.html stateless http://whatis.techtarget.com/definition/0,,sid9_gci213051,00.html ______________________ SELECTED LINKS: SearchNetworking.com has a collection of "Best Web Links for Basic Networking." http://searchnetworking.techtarget.com/bestWebLinks/0,289521,sid7_tax369,00.html Tom Sheldon's Linktionary offers an introduction to connection-oriented and connectionless services. http://www.linktionary.com/c/connections.html InetDaemon offers a tutorial, "Connection-Oriented vs. Connectionless." http://www.inetdaemon.com/tutorials/theory/basics/connection-oriented_vs_connectionless.html ______________________ THIS DAY IN IT HISTORY | October 16, 1985 Intel announced their new 32-bit microprocessor, the 386, which was capable of running multiple software applications at the same time. http://searchsolaris.techtarget.com/sDefinition/0,,sid12_gci507092,00.html ______________________ CROSSWORD PUZZLE #5 | Firewalls Improve your flexible thinking skills. Print out the puzzle and keep it nearby to work on throughout your day! http://whatis.techtarget.com/definition/0,,sid9_gci856796,00.html ______________________ QUIZ #17 | DSL Do you know why DSL is so fast? Take our quiz and find out! http://whatis.techtarget.com/definition/0,,sid9_gci783951,00.html ______________________ REAL-LIFE CHALLENGE #18 | Can backup tapes wear out? How long can you use the same tapes over and over before they need to be permanently retired? Is seven years too long? http://whatis.discussions.techtarget.com/WebX?[EMAIL PROTECTED]@.1dcfae0e/148!viewtype=threadDate&skip=&expand= ______________________________ RECENT ADDITIONS AND UPDATES [1] N1 http://searchsolaris.techtarget.com/sDefinition/0,,sid12_gci854790,00.html [2] OOPSLA http://searchwebservices.techtarget.com/sDefinition/0,,sid26_gci854764,00.html [3] segmentation and reassembly http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci854752,00.html [4] SIGTRAN http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci854620,00.html [5] TP0-TP4 http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci854617,00.html ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: LOWELL THING, Site Editor ([EMAIL PROTECTED]) ____________________________________________________________________ MARGARET ROUSE, Associate Editor ([EMAIL PROTECTED]) ___________________________________________________________________ :::::::::::::::::::: ABOUT THIS NEWSLETTER ::::::::::::::::::::: Published by TechTarget (http://www.techtarget.com) TechTarget - The Most Targeted IT Media Copyright 2002, All Rights Reserved. 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