COMPTIA A+ 2006 In Depth by Jean Andrews

By Jean Andrews

This complete certification resolution not just offers thorough guidance for CompTIA's most recent A+ certification assessments but in addition will give you real-worldinstruction on every little thing you want to comprehend to help and troubleshoot computing device and software program. up-to-date to incorporate the most up-tp-date applied sciences, with a brand new bankruptcy on securing your laptop and small community, CompTIA A+ 2006 In Depthtakes you from the "just-a-user" point to the "I-can-fix-this" point on all workstation and software program issues. insurance is balanced. whereas targeting new and software program, the textual content additionally covers the true paintings of computing device fix, the place a few older know-how continues to be in common use and nonetheless wishes aid. It additionally covers all working systems-every home windows OS, in addition to Linux and Mac OS. all of the content material that pertains to CompTIA's A+ necessities, 220-602, 220-603, and 220-604 certification assessments is highlighted with an A+ icon that denotes the examination identify and the target quantity that the content material refers to. This designated function highlights the correct content material at a look that you should pay additional recognition to this fabric, however it additionally is helping positioned examination details into context. extra callouts offer important test-taking tricks and the best way to be mindful for examination day. With accomplished insurance of all and software program issues, CompTIA A+ 2006 intensive is a textual content you can be absolute to consult with repeatedly, lengthy after you've got handed the examination.

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The BIOS chip for ESCD BIOS is a special RAM chip called Permanent RAM, or PRAM, that can hold data written to it without the benefit of a battery, which the CMOS setup chip requires. >> CHAPTER SUMMARY A computer requires both hardware and software to work. The four basic functions of the microcomputer are input, output, processing, and storage of data. Data and instructions are stored in a computer in binary form, which uses only two states for data—on and off, or 1 and 0—which are called bits.

The technology to access these devices is embedded on the card itself, and the card also has the technology to communicate with the slot it is in, the motherboard, and the CPU. The easiest way to determine the function of a particular expansion card (short of seeing its name written on the card, which doesn’t happen very often) is to look at the end of the card that fits against the back of the computer case. A network card, for example, has a port designed to fit the network cable. An internal modem has one, or usually two, telephone jacks as its ports.

1 7 1 HARDWARE INSIDE THE COMPUTER CASE Most storage and all processing of data and instructions are done inside the computer case, so before we look at components used for storage and processing, let’s look at what you see when you first open the computer case. Most computers contain these devices inside the case (see Figure 1-8): A motherboard containing the CPU, memory, and other components A floppy drive, hard drive, and CD drive used for permanent storage A power supply with power cords supplying electricity to all devices inside the case Circuit boards used by the CPU to communicate with devices inside and outside the case Cables connecting devices to circuit boards and the motherboard CD-RW drive Power supply Power cords going to various components Case exhaust fan CPU cooler unit Motherboard with CPU installed 40-pin IDE cable Floppy drive cable Floppy drive Hard drive Rear of case Serial ATA cable Circuit boards (expansion cards) Front of case Figure 1-8 Inside the computer case Some of the first things you’ll notice when you look inside 8 Video a computer case are circuit boards.

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