Chapter 3: Peripherals and Connectors
- B, E. Early LCD monitors featured one or more fluorescent bulbs that were used to produce light that shone through the LCD panel. Modern LCD monitors have LED panels to generate the light, the advantage being that there is now a separate LED for each picture element instead of a common light source for the entire monitor. OLEDs do provide light, but RGB OLEDs are not used. Incandescent and halogen bulbs are not used for backlighting.
- A. USB 2.0 has a maximum speed of 480 Mbps. USB 3.0 is 5 Gbps; USB 3.1 is 10 Gbps; and USB 3.2 is 20 Gbps.
- C. A touch screen provides video output, and users can touch the screen to provide input as well. A webcam is for video input, and a projector is for video output. A KVM switch lets users connect one keyboard, video, and mouse set to multiple computers and switch between them.
- D. As you lower the resolution, the maximum refresh rate allowed tends to increase. The refresh rate is most often expressed in cycles...
