Download e-book for kindle: A+, Network+, Security+ Exams in a Nutshell. A Desktop Quick by Pawan K. Bhardwaj

By Pawan K. Bhardwaj

ISBN-10: 0596551517

ISBN-13: 9780596551513

If you are getting ready for the recent CompTIA 2006 certification in A+, or the present community+ and safeguard+ certifications, you will discover this e-book valuable. It presents all of the info you want to prepare for those tests, together with the 4 new A+ assessments -- the necessary necessities examination and 3 non-compulsory checks that pertain for your region of specialization.

As with different O'Reilly Nutshell books for certification checks, A+, community+ and protection + in a Nutshell follows a confirmed type and process. It experiences all the subject matters had to grasp each one examination in a remarkably concise structure, with required wisdom boiled all the way down to the middle. rather than plowing via 500 to seven-hundred pages to arrange for every examination, this booklet covers every one in nearly one hundred fifty pages. and as the goals for the 3 optional A+ checks are redundant, and the publication covers them in a single section.

The tests coated include:

  • A+ necessities: Required for A+ 2006 certification
  • EXAM 220-602:...

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Additional info for A+, Network+, Security+ Exams in a Nutshell. A Desktop Quick Reference

Sample text

Power supply connectors There is only one main power supply connector on the motherboard. There is also a small 4-pin connector for the CPU/fan assembly. It is rectangular in shape and white in color. ATX motherboards use a 20-pin power supply connector in which the holes are polarized to prevent incorrect connection. Power supplies The purpose of the power supply is to convert 110-volt or 220-volt AC voltage into DC voltage for different parts of the computer. The power supply unit for the computer has its own case.

RAM can be dynamic or static. For most common functions, the dynamic random access memory (DRAM) is used as the main memory of the computer, while the static random access memory (SRAM) is mostly used for the system cache. The following paragraphs summarize different types of memory: DRAMDRAM stands for dynamic random access memory. The term dynamic refers to the requirement of the memory chip to be periodically refreshed in order to retain its contents—if this fails, the stored contents can be lost.

Another new area is the knowledge of laptops and portable devices. In each of the study areas, you are expected to be skilled in identifying individual computer components as well as in installing, upgrading, and configuring them. You must also have hands-on experience in optimizing performance, using appropriate tools to diagnose problems, and performing preventive maintenance. The approximate percentage of each section in Exams 220–602, 220–603, and 220–604 is given in Table 1-1.  A+ Essentials exam domains and percentage of coverage Domain Percentage of coverage Personal computer components 21 percent Laptops and mobile devices 11 percent Operating systems 21 percent Printers and scanners 9 percent Networks 12 percent Security 11 percent Safety and environmental issues 10 percent Communication and professionalism 5 percent CompTIA recommends that in order to be prepared for the A+ Essentials exam, you should have approximately 500 hours of actual active experience with computer hardware, either in the field or in a lab.

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A+, Network+, Security+ Exams in a Nutshell. A Desktop Quick Reference by Pawan K. Bhardwaj

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