By Microsoft Corporation, Microsoft Press

ISBN-10: 0735611092

ISBN-13: 9780735611092

The A+ Certification software was once created by way of a consortium of businesses, together with Microsoft, to outline baseline wisdom and ability degrees for IT pros who help and software program in keeping with the Intel platform. With the A+ Certification education equipment, moment variation, Microsoft applies its well known, competency-based studying layout to A+ Certification attempt practise. Entry-level IT pros, laptop carrier technicians, and different computing device technology tune scholars can use the package to construct real-world services with platforms and working structures - as they arrange for the corresponding ability parts of the A+ examination. The package is modular and self-paced, with hands-on, skill-building routines. the full direction is featured on CD-ROM for simple searches and reference.

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But the CPU also encompasses several other components that support it with the management of data. These components, when working in harmony, make up the computer we know today. The following table lists these components. Component Description Motherboard The large circuit board found inside the computer. Without it, a computer is just a metal box. The motherboard contains all the remaining items in this table; for all practical purposes, it is the computer. 34 Chip set A group of computer chips or integrated circuits (ICs) that, when working together, manage and control the computer system.

Computers based on the 80286 chip featured: • Two memory modes (real and protected). • 16 MB of addressable memory. • Clock speeds up to 20 MHz. • Reduced command set (fewer program commands to do more work). • Multitasking abilities. 52 Lesson 1: Microprocessors Lesson 1: Microprocessors 53 • Virtual memory support. Virtual Memory Virtual memory is the art of using hard disk space to hold data not immediately required by the processor; it is placed in and out of RAM as needed. Although using virtual memory slowed the system down (electronic RAM is much faster than a mechanical hard drive), it allowed the 286 to address up to 1 GB (gigabyte—one thousand megabytes) of memory (16 MB of actual memory and 984 MB of virtual memory).

It is important for a computer technician to understand the development of the processor and what makes each version different from its predecessors. This knowledge gives us an understanding of the enhancements each new design offers over earlier ones and how the system components can take advantage of the new features. After this lesson, you will be able to ♦ Describe how a microprocessor works. ♦ Define different types of processors and describe their advantages and limitations. Estimated lesson time: 40 minutes Computer technicians, fortunately, aren't required to design microprocessors, only to understand how they work.

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A+ Certification Training Kit by Microsoft Corporation, Microsoft Press


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