Category Archives: Notes

Notes for A+ Exams

WISP: WIRELESS INTERNET SERVICE PROVIDER

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WIRELESS DATA COMMUNICATIONS

Wireless data communications are an essential component of mobile computing. The various available technologies differ in local availability, coverage range and performance. Supporting technologies include: Wi-Fi is a wireless local area network that enables portable computing devices to connect easily … Continue reading

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UPS (UNINTERUPTIBLE POWER SUPPLY)

An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. A UPS differs from an auxiliary or emergency … Continue reading

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LOREM IPSUM

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DIODE

In electronics, a diode is a two-terminal electronic component with an asymmetric transfer characteristic, with low (ideally zero) resistance to current flow in one direction, and high (ideally infinite) resistance in the other. A semiconductor diode, the most common type … Continue reading

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CPU

CPU The central processing unit (CPU) is the portion of a computer system that carries out the instructions of a computer program, to perform the basic arithmetical, logical, and input/output operations of the system. The CPU plays a role somewhat … Continue reading

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