THE WHATIS.COM WORD-OF-THE-DAY November 15, 2002 public land mobile network ______________ TODAY'S SPONSOR: 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,,7544,00.htm?freeguide ______________ TODAY'S WORD: public land mobile network See our definition with hyperlinks at http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci863525,00.html A public land mobile network (PLMN) is any wireless communications system intended for use by terrestrial subscribers in vehicles or on foot. Such a system can stand alone, but often it is interconnected with a fixed system such as the public switched telephone network (PSTN). The most familiar example of a PLMN end user is a person with a cell phone. However, mobile and portable Internet use is also becoming common. The ideal PLMN provides mobile and portable users with a level of service comparable to that of subscribers in a fixed network. This can be a special challenge in regions where the terrain is irregular, where base station sites are hard to find and maintain, and in urban environments where there are numerous obstructions such as buildings, and myriad sources of radio-frequency (RF) radiation that can cause noise and interference. Most systems today use digital technology rather than the older analog methods. This transition has resulted in improved communications coverage and reliability, but as anyone who regularly uses a cellular telephone knows, perfection has yet to be achieved. A PLMN requires special security measures because a wireless system is inherently more susceptible to eavesdropping and unauthorized use than a hard-wired system. Smart cards containing user data, encryption/decryption, and biometric verification schemes can minimize this problem. RELATED TERMS: wireless http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci213380,00.html public switched telephone network http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci214316,00.html cell phone http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci211763,00.html radio-frequency http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci214263,00.html noise http://whatis.techtarget.com/definition/0,,sid9_gci212667,00.html encryption http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci212062,00.html biometric verification http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci789799,00.html ______________________ SELECTED LINKS Ericsson uses this term in its overview called "Understanding Telecommunications." http://www.ericsson.com/about/telecom/part-d/d-1-1.shtml SearchNetworking.com provides "Best Web Links" about wireless technologies. http://searchnetworking.techtarget.com/bestWebLinks/0,289521,sid7_tax286411,00.html ______________________ QUIZ #34 | Workstations How much do you know about managing computer workstations? Take our latest quiz and find out. >> Take the quiz http://whatis.techtarget.com/definition/0,,sid9_gci862959,00.html ______________________ CROSSWORD PUZZLE #6 | Wireless 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_gci861329,00.html ______________________ REAL-LIFE CHALLENGE #19 | People problems Sometimes, the toughest IT-related problems have nothing to do with hardware or software. They're people problems. Susan is upset that her supervisor won't go to bat for her. Can you offer advice? http://whatis.discussions.techtarget.com/WebX?msgInContext@;128.ebLXaMkJu6M.22@.1dcfae0e/160!viewtype=threadDate&skip=&expand= ______________________________ RECENT ADDITIONS AND UPDATES [1] nagware http://whatis.techtarget.com/definition/0,,sid9_gci860960,00.html [2] Daylight Saving Time http://whatis.techtarget.com/definition/0,,sid9_gci860747,00.html [3] X dimension http://whatis.techtarget.com/definition/0,,sid9_gci860044,00.html [4] DOT4 http://searchhp.techtarget.com/sDefinition/0,,sid6_gci860597,00.html [5] Stefan-Boltzmann constant http://whatis.techtarget.com/definition/0,,sid9_gci861008,00.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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