THE WHATIS.COM WORD-OF-THE-DAY October 1, 2002
SCTP ______________ TODAY'S SPONSOR: VeriSign - The Value of Trust Secure all your Web servers now - with a proven 5-part strategy. The FREE Server Security Guide shows you how to deploy the latest encryption and authentication techniques, deliver transparent protection with the strongest security without disrupting users, and more. Get your FREE Guide now: http://WhatIs.com/r/0,,6197,00.htm?FreeGuide ______________ TODAY'S WORD: SCTP See our definition with hyperlinks at http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci853962,00.html SCTP (Stream Control Transmission Protocol) is a protocol for transmitting multiple streams of data at the same time between two end points that have established a connection in a network. Sometimes referred to as "next generation TCP" (Transmission Control Protocol) - or TCPng, SCTP is designed to make it easier to support a telephone connection over the Internet (and specifically to support the telephone system's Signaling System 7 - SS7 - on an Internet connection). A telephone connection requires that signaling information (which controls the connection) be sent along with voice and other data at the same time. SCTP also is intended to make it easier to manage connections over a wireless network and to manage the transmission of multimedia data. SCTP is a standard protocol (RFC 2960) developed by the Internet Engineering Task Force (IETF). Like TCP, SCTP manages "reliable transport" (ensuring the complete arrival of data units that are sent over the network) over the Internet's basically connectionless Internet Protocol (IP), the protocol responsible for moving the data but not for managing whether all the data arrives. Unlike TCP, SCTP ensures the complete concurrent transmission of several streams of data (in units called messages) between connected end points. SCTP also supports multihoming, which means that a connected end point can have alternate IP addresses associated with it in order to route around network failure or changing conditions. TCP transmits data in a single stream (sometimes called a bytestream) and guarantees that data will be delivered in sequence to the application or user at the end point. If there is data loss, or a sequencing error, delivery must be delayed until lost data is retransmitted or an out-of-sequence message is received. SCTP's multi-streaming allows data to be delivered in multiple, independent streams, so that if there is data loss in one stream, delivery will not be affected for the other streams. For some transmissions, such as a file or record, sequence preservation is essential. However, for some applications, it is not absolutely necessary to preserve the precise sequence of data. For example, in signaling transmissions, sequence preservation is only necessary for messages that affect the same resource (such as the same channel or call). Because multi-streaming allows data in error-free streams to continue delivery when one stream has an error, the entire transmission is not delayed. RELATED TERMS: protocol http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212839,00.html connection http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci555204,00.html SS7 http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci214365,00.html signaling http://whatis.techtarget.com/definition/0,,sid9_gci214370,00.html multihoming http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212611,00.html TCP http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci214172,00.html ______________________ SELECTED LINKS: The IETF provides a draft of the Stream Control Transmission Protocol, RFC 2960. http://www.ietf.org/rfc/rfc2960.txt The Computer Networking Technology Group offers an SCTP tutorial. http://tdrwww.exp-math.uni-essen.de/inhalt/forschung/sctp_fb/ SCTP.org is a resource center about SCTP. http://www.sctp.org/ SearchNetworking.com offers a white paper, "SS7/IP interworking options for integrating PSTN signaling with next-gen telecom signaling technologies." http://searchnetworking.techtarget.com/whitepaperPage/0,293857,sid7_gci827884,00.html ______________________ THIS DAY IN IT HISTORY | October 1, 1998 The Internet Corporation for Assigned Numbers and Names (ICANN) officially assumed responsibility for administrating top-level domain names. http://searchwebservices.techtarget.com/sDefinition/0,,sid26_gci213511,00.html ______________________ CROSSWORD PUZZLE | #3 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_gci852146,00.html ______________________ QUIZ #8 | Database basics How much do you know about how a database works? Take our quiz and find out! http://searchdatabase.techtarget.com/sDefinition/0,,sid13_gci750695,00.html ______________________ REAL-LIFE CHALLENGE #15 | Networking a small business Company Epsilon wants to connect their machine shops to the main office. Will they need outside help, or is networking the buildings something they can do on their own? http://whatis.discussions.techtarget.com/WebX?[EMAIL PROTECTED]@.1dcfae0e/137!viewtype=threadDate&skip=&expand= ______________________________ RECENT ADDITIONS AND UPDATES [1] Bel http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci854018,00.html [2] intelligent character recognition http://whatis.techtarget.com/definition/0,,sid9_gci854008,00.html [3] project planning http://searchcrm.techtarget.com/sDefinition/0,,sid11_gci853989,00.html [4] relative identifier http://searchwindowsmanageability.techtarget.com/sDefinition/0,,sid33_gci850565,00.html [5] mobility agent http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci850702,00.html ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: LOWELL THING, Site Editor ([EMAIL PROTECTED]) ____________________________________________________________________ MARGARET ROUSE, Assistant 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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