Cambridge IGCSE Computer Science Question and Answer 100% Correct

Cambridge IGCSE Computer Science Question and Answer 100% Correct HTTP - hypertext transfer protocol - a set of rules which must be followed when transferring files across the internet URL - uniform resource locator - used to find/identify a webpage on the internet 1. webserver name 2. file name 3. protocol web browser - software that allows a user to display a webpage on their screen - they interpret html code and show the result actuator - used in many control operations involving sensors and ADC/DACs. Electromagnetic device eg. motor that outputs result of sensor operation loudspeaker - output device that produces sound using voltages at different levels which vibrate a cone in speaker housing LED - Used for backlighting a monitor/tv - they are thin, produce a white light, and do not require much power CCFL - Old technology used for backlighting - took time to warm up, and produced yellow-ish lighting + required a lot of power