Download A+ Certification for Dummies, 3rd edition by Ron Gilster PDF

By Ron Gilster

Prepping for the A+ certification examination isn't a simple problem, yet on the way to develop into a qualified desktop technician, passing this try is a demand. the good news is you simply need to take it as soon as on your lifestyles to develop into certified.A+ Certification For Dummies third variation is a no-nonsense, easy-to-use reference and examine consultant for the A+ middle examination and the OS applied sciences examination! It specializes in the whole lot you want to understand to cross those checks, delivering heritage info that can assist you comprehend a number of the extra complicated recommendations and applied sciences. You’ll have a deal with on all of the matters, including:The anatomy of a computerBuilding and deconstructing a PCMaintaining a computerOperating structures basicsProfiles of home windows ninety five, ninety eight, Me, 2000, and XPMaking community connectionsWorking with the networkSharing the internetThe bonus CD-ROM gains unique test-prep software program with two times as many pattern questions than the former variants of this booklet, plus demo models of Boson software program, Inc., JRK software program, Vista-Net Publishing, and Self try out software program. Now increased to incorporate the 2003 model of the examination, this is often the fun-and-easy strategy to learn for the examination, with the entire rewards in part the time!

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Sample text

Prep Tests: The Prep Tests at the end of each chapter gauge your understanding of the chapter’s content. These Prep Test questions are structured in the same manner as those you may see on your exam, so try your hand at these sample questions. Icons Used in This Book Time Shaver Time Shaver icons point out tips that can help you manage and save time while studying for or taking the exam. Instant Answer Instant Answer icons highlight tips to help you recognize correct and incorrect exam answers and point out information that is likely to be on the test.

Chapter 9 provides more information on the power used in the PC and how it is measured. 35 amps for typical operation. Ohms Measures a conductor’s resistance to electricity Resistance of less than 20 ohms means that current can flow through a computer system. Volts Measures the electrical pressure in a circuit A PC power supply generates 4 levels of voltage: +5 volts (V), –5V, +12V, and –12V. Watts Measures the electrical power in a circuit range A PC power supply is rated in a range of 200 to 600 watts.

An electrostatic discharge you can’t feel can harm an electronic component. Looking at the dark side of ESD Most PCs are designed for some ESD protection as long as their cases are intact and closed properly. Cases are chemically treated or have copper fittings designed to channel electrostatic discharge away from the sensitive components inside. The danger from ESD damage begins when the case is opened and the fragile components on the motherboard are exposed. When a human with a static electrical charge touches anything inside the case, the charge can travel along the wires interconnecting the various electronic components.

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