CompTIA A+/220-1101 (4) 썸네일형 리스트형 1.4 Mobile Device Connectivity https://www.professormesser.com/free-a-plus-training/220-1101/220-1101-video/220-1101-training-course/ Cellular Standards Cellular networks Mobile devices - "Cell" phones Separate land into "cells" - Antenna coverages a cell with certain frequencies 2G networks - GSM -> Global System for Mobile Communications, CDMA -> Code Division Multiple Access Poor data support - Orignially used circuit-swit.. 1.3 Mobile Device Configuration https://www.professormesser.com/free-a-plus-training/220-1101/220-1101-video/220-1101-training-course/ Connecting Mobile Devices Connecting mobile devices Phones and tablets - Many different ways to connect Wire and wireless connectivity - Standards and options change through the years Used for synchronization, connectivity, backup, and identification - Sometimes simultaneously USB Designed for .. 1.2 Laptop Displays https://www.professormesser.com/free-a-plus-training/220-1101/220-1101-video/220-1101-training-course/ Laptop Displays Portable LCD Liquid Crystal Display - Light shines through liquid crystals Advantage - Lightweight, Relatively low power, Relatively inexpensive Disadvantage - Black levels are a challenge, Requires separate backlight -> Florescent, LED, etc -> Lights are difficult to replace LC.. 1.1 Laptop Hardware https://www.professormesser.com/free-a-plus-training/220-1101/220-1101-video/220-1101-training-course/ Laptop hardware Engineering to precise specifications - A challenging repair Same laptops are easier to fix than others - An onging learning process Understand the process - The details will vary between laptop manufactures Laptop batteries The power source when unplugged - May be easily replac.. 이전 1 다음
