A+ All-In-One Certification Exam Guide, 3rd Edition
by Michael Meyers
$59.99; ISBN: 0072126795
A+ All-In-One Certification Exam Guide, 3rd Edition
by Michael Meyers
$59.99; ISBN: 0072126795
Chaper 1
The Visible PC
In this chapter, you will:
• See the major components of a PC.
• Understand the different connectors in a PC.
• Recognize the most common devices inside a PC.
• Learn how to set jumpers and switches.
Mastering the craft of the PC Technician requires you to learn a lot of details about a zillion
things. Even the most basic PC contains hundreds of discrete hardware components, each with
its own set of characteristics, shapes, sizes, colors, connections, etc. By the end of this book, you
will be able to discuss all of these components in detail.
In order to understand the details, you often need to understand the big picture first. "The Visible
PC" should enable you to recognize the main components of the CPU and to understand their
function. You will also see all the major connectors, plugs, and sockets, and learn to recognize a
particular part simply by seeing what type of connector attaches to that part. Even if you are an
expert, do not skip this chapter! It introduces a large number of terms that will be used throughout
the rest of the book. Many of these terms you will know, but some you will not, so take some time
and read it.
It is handy, although certainly not required, to have a PC that you can take the lid off and inspect
as you progress. So get thee to a screwdriver, grab your PC, take off the lid, and see if you can
recognize the various components as you read about them.
Warning! If you decide to open a PC while reading this chapter, you must take
proper steps to avoid the greatest killer of PCs - Electrostatic Discharge (ESD).
ESD simply means the passage of a static electrical charge into your PC. Have
you ever rubbed a balloon against your shirt, making it stick to you? That's a
classic example of static electricity. When that charge dissipates, we barely
notice it happening or don't notice it at all, although on a cool, dry day, I've been
shocked by a doorknob so hard that I could see a big blue spark! If you decide to
open a PC as you read this chapter, jump ahead to the Power Supplies chapter
and read up on ESD and how to prevent it - the life you save may be your PC's!
CPU
The Central Processing Unit (CPU), also called the microprocessor, performs all of the
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资源评论
xhyt_99992013-04-02这本书对入门者还是有用的
shenxinshan6211072014-06-24CompTIA考试指南，有参考价值。- openepo2013-07-26书我下载了，还不错。可惜版本比较老了，如果有最新的 8th edition 就好了。
