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CompTIA A+ Complete Review Guide: Exam 220-701 / Exam by Emmett Dulaney

By Emmett Dulaney

I've got purely been utilizing the ebook for per week or so and feature came across a number of error actually. The ebook is outdated on expertise, similar to, the Pentium four is the most recent Intel processor mentioned and Rambus reminiscence is acknowledged as being 'relatively new', with out point out of DDR3 or four. the subject series follows the A+ targets, which does not lend itself to solid continuity. The perform checks at the CD usually are not flexible - you cannot decide upon particular issues or decide on a selected variety of questions. total, i'm disenchanted and need I had spent my cash on a distinct e-book.

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One of the things that CompTIA is notorious for is having overlap between domains and exams, and the A+ is no exception. This domain is weighted at 27 percent (the highest of any) of the Essentials exam, and a great deal of the material covered here also appears in other domains (not to mention in the Practical Application exam). Because of this, you’ll want to make sure you’re comfortable with the information presented in this chapter before moving on to other chapters. As a doctor must be intimately acquainted with human anatomy, so a computer technician must understand the physical and functional structure of a personal computer.

10 Chapter 1 Hardware n Throughout this chapter, you will need to know about key component categories: storage devices, motherboards, power supplies, processor/CPUs, memory, display devices, input devices, adapter cards, ports and cables, and cooling systems. The first of these is discussed in the section that follows. 5-inch disk drive Power button Hard disk drive access indicator Front bezel Reset button Storage Devices Storage media hold the data being accessed, as well as the files the system needs to operate and data that needs to be saved.

3 ​ ​Three thumb drives shown with a pack of gum External Drives A number of vendors are now making external hard drives. These often connect to the computer through the USB port, but can also connect through the network (and be shared by other users) or other connections. While some are intended for expansion, many are marketed for the purpose of “mirroring” data on the internal drive(s) and often incorporate a push-button switch that starts a backup. 14 Chapter 1 Hardware n While not as common as they once were, Iomega’s Zip and Jaz drives are detachable, external hard disks that are used to store a large volume (around 100MB for the Zip, 1GB and 2GB for the Jaz) of data on a single, thick floppy-sized disk.

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