By Michael Meyers
Mike Meyers has performed it back. the number one, best-selling research advisor for CompTIA's A+ Certification assessments has been thoroughly revised and up to date for the hot 2001 checks. Written by means of the industry's best authority on A+ Certification, this must-have reference deals entire insurance of all fabric on either the middle and working approach applied sciences assessments. Plus, the bonus CD-ROM includes 6 perform checks, countless numbers of questions, and LearnKey(tm) movies. This accomplished advisor not just is helping you go the A+ certification checks, but additionally teaches you the way to be knowledgeable technician.
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4. ). 5. d - The two-row, 15-pin connector coupled with a BNC (cable) connector clearly mark this a network interface card. 6. a - Modems use RJ-11 jacks, just like a telephone. 7. b - RAM provides temporary storage for programs and data currently in use. 8. a - Hard drives provide permanent storage for programs and data 9. c - The 34-pin floppy drive ribbon cables have a distinctive twist, 32 whereas the 40-pin EIDE cables do not. 10. " Chapter 3 RAM In this chapter, you will: • • • • • See the different types of RAM packaging.
There was no standard way to tell EDO from FPM DRAM, so again we were always careful to label our EDO RAM as such (Figure 03-47). Figure 47: How to tell EDO from FPM - another label You wanted to use EDO whenever possible. Unfortunately, you couldn't just put EDO RAM in any computer. In order to take advantage of EDO, you needed a chipset designed to handle EDO. The majority of the early Pentium systems used EDO RAM, but that was not true of the 486s with 72-pin SIMM slots. You had to refer to your motherboard book to see if your system could use EDO RAM.
Don't let the numbers confuse you! You might be inclined to think a "1MB x 32 SIMM" referred to a 1 megabyte capacity RAM stick, but that is incorrect. A 1MB x 32 SIMM had 1 Meg of 32 bits, which is equal to 4 Meg of 8 bits, which means that the SIMM could hold four megabytes of RAM (1,048,576 x 32 = 4 megabytes). Here are some common 72-pin SIMMs and their sizes: 1 x 32 = 4 megabytes, no parity 1 x 36 = 4 megabytes, parity 2 x 32 = 8 megabytes, no parity 2 x 36 = 8 megabytes, parity 4 x 32 = 16 megabytes, no parity 4 x 36 = 16 megabytes, parity 8 x 32 = 32 megabytes, no parity 8 x 36 = 32 megabytes, parity 16 x 32 = 64 megabytes, no parity 16 x 36 = 64 megabytes, parity Another benefit to the 32-bit wide 72-pin SIMMs was that you needed only one 72-pin SIMM to make a bank in a 386 or 486.