Monitors and Display Metrics

Contrast ratio is the comparison of the brightest to the darkest color a monitor can create. The higher the ratio, the more brightness variation exists in the monitor.

Video cards have a basic resolution, usually 640x480 or 800x600, with 256 colors. If the PC boots to this reduced resolution and limited color scheme, it needs a better video driver. Table 1-11 shows the resolutions you need to know for the A+ exam.