THE WHATIS.COM WORD-OF-THE-DAY February 18, 2004 Power over Ethernet ______________________ SPONSORED BY: Career Center
Visit the whatis.com Career Center powered by Dice and find new jobs being added every day with thousands of positions to choose from. Receive automatic e-mails when a listing matches your criteria and have your profile automatically sent to Dice.com member companies. Get the career resources you need to set yourself apart from other job seekers. Visit today! http://whatis.techtarget.com/dice/0,294542,sid9,00.html?track=NL-34&Offer=dicewhtssur1 ______________________ TODAY'S WORD: Power over Ethernet See our complete definition with hyperlinks at http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci846792,00.html?track=NL-34 Power over Ethernet (PoE) is a technology for wired Ethernet LANs (local area networks) that allows the electrical current, necessary for the operation of each device, to be carried by the data cables rather than by power cords. This minimizes the number of wires that must be strung in order to install the network. The result is lower cost, less downtime, easier maintenance, and greater installation flexibility than with traditional wiring. For PoE to work, the electrical current must go into the data cable at the power-supply end, and come out at the device end, in such a way that the current is kept separate from the data signal so that neither interferes with the other. The current enters the cable by means of a component called an injector. If the device at the other end of the cable is PoE compatible, then that device will function properly without modification. If the device is not PoE compatible, then a component called a picker or tap must be installed to remove the current from the cable. This "picked-off" current is routed to the power jack. To minimize the possibility of damage to equipment in the event of a malfunction, the more sophisticated PoE systems employ fault protection. This feature shuts off the power supply if excessive current or a short circuit is detected. _________________________ RELATED TERMS: Ethernet http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212080,00.html?track=NL-34 LAN http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212495,00.html?track=NL-34 current http://whatis.techtarget.com/definition/0,,sid9_gci211871,00.html?track=NL-34 ______________________ SELECTED LINKS: Jim Geier of 802.11 planet.com has written a PoE tutorial. http://www.80211-planet.com/tutorials/article/0,4000,10724_1404631,00.html Cisco Systems Inc. has announced it will support PoE in its Catalyst family of switch products. http://searchnetworking.techtarget.com/originalContent/0,289142,sid7_gci950939,00.html?track=NL-34 Hyperlink Technologies offers PoE-compatible products. http://www.hyperlinktech.com/web/poe.html ______________________ TODAY'S TECH NEWS: NETSKY-B SOARS FROM EUROPE TO THE US Netsky-B, a new mass mailer worm, started spreading strongly in Europe this morning. Antivirus experts warn the worm packs a double wallop as it can spread via e-mail and through network file shares. http://searchsecurity.techtarget.com/originalContent/0,289142,sid14_gci951084,00.html?track=NL-34 ORACLE SENDS LETTER TO PEOPLESOFT SHAREHOLDERS The letter lays out its takeover argument and lashes out at PeopleSoft's management for devising "schemes to further entrench and enrich themselves at [shareholder] expense." http://searchcrm.techtarget.com/originalContent/0,289142,sid11_gci950997,00.html?track=NL-34 CISCO MAKES STRONG MOVE ON POWER OVER ETHERNET Cisco catches up to the industry by supporting the IEEE's 802.3af power over Ethernet standard in several of its Catalyst switch lines, paving the way for a new generation of cheaper, more advanced PoE-enabled gear. http://searchnetworking.techtarget.com/originalContent/0,289142,sid7_gci950939,00.html?track=NL-34 >> Catch up on all the latest IT news at http://searchtechtarget.techtarget.com?track=NL-34 ______________________ READER POLL | SearchExchange.com How much did Mydoom affect your e-mail system? Please let us know. http://searchexchange.techtarget.com/news/0,289141,sid43,00.html?track=NL-34 ______________________ WORDS-TO-GO | Wireless Mobile computing has its own vocabulary. We've created a glossary to help you stay on top of new terms. If you have a Palm OS or PocketPC device, you can download a PDA version of this handy reference. http://searchmobilecomputing.techtarget.com/sDefinition/0,,sid40_gci947525,00.html?track=NL-34 ______________________ SECRET WORD-OF-THE-DAY | What is IT? This looks like it might be an exclusive place you'd find an Apple computer, but it's really any computer's unique hardware number. Do you think you know the Secret Word? Click to see if you're right! http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212506,00.html?track=NL-34 ______________________ QUIZ #27 | Security Awareness for End Users The SANS Institute recommends that organizations take time to educate employees about computer security and periodically test them to make sure they understand the basics. To help you in your efforts to raise security awareness in your organization, we've created the following quiz. http://searchcio.techtarget.com/sDefinition/0,,sid19_gci826572,00.html?track=NL-34 ______________________ HOROSCOPES FOR GEEKS | February Planning on doing a little personal networking? Find out what the stars have in store for you the rest of this month! http://searchcio.techtarget.com/sDefinition/0,,sid19_gci919205,00.html?track=NL-34 ______________________________ RECENT ADDITIONS AND UPDATES [1] XQuery http://searchdatabase.techtarget.com/sDefinition/0,,sid13_gci950349,00.html?track=NL-34 [2] Lindows http://searchenterpriselinux.techtarget.com/sDefinition/0,,sid39_gci899769,00.html?track=NL-34 [3] Can-Spam Act of 2003 http://searchcrm.techtarget.com/sDefinition/0,,sid11_gci948840,00.html?track=NL-34 [4] demo and demoscene http://whatis.techtarget.com/definition/0,,sid9_gci557356,00.html?track=NL-34 [5] Mathematical Symbols http://whatis.techtarget.com/definition/0,,sid9_gci803019,00.html?track=NL-34 ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: MARGARET ROUSE, Site Editor ([EMAIL PROTECTED]) IVY WIGMORE, Consulting Editor ([EMAIL PROTECTED]) LOWELL THING, Consulting Editor and Founder ([EMAIL PROTECTED]) GABRIELLE DERUSSY, Advertising ([EMAIL PROTECTED]) ::::::::::::::::::::: ABOUT THIS NEWSLETTER :::::::::::::::::::::: This e-newsletter is published by WhatIs.com, a targeted Web site from TechTarget, the most targeted IT media and events company. 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