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CompTIA® A+® Training Kit (Exam 220-801 and Exam 220-802) by Darril Gibson

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Glossary

Numbers and Symbols

802.11

Group of wireless protocols. 802.11a uses 5.0 GHz and has a maximum speed of 54 Mbps. 802.11b uses 2.4 GHz and has a maximum speed of 11 Mbps. 802.11g uses 2.4 GHz and has a maximum speed of 54 Mbps. 802.11n uses 2.4 and 5.0 GHz and has a maximum speed of 600 Mbps.

A

A/V (Audio Video)

A combination of sound (audio) and gr aphics (video). Camcorders can capture A/V.

AC voltage

Alternating current used by commercial power to transmit electricity to buildings. AC voltage is available at common electrical wall outlets, and power supplies convert AC to DC.

accelerometer

A chip in many mobile devices used to detect the orientation of the device and change the display. A basic use is to change the display to landscape or portrait ...

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