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Fundamentals Of Computer

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  Short-Answer Question Q#1: Define computer hardware. Ans: Computer Hardware:             Computer hardware is a collection of all the physical parts or components of a computer. It includes the computer casing, the CPU or central Processing Unit, computer memory, VGA graphics card, sound card and the motherboard.   Q#2: Define Computer Software. Ans: Computer Software:             Computer software is a computer program that coordinates all the activities and functions of a computer. It also controls all the operations of the computer hardware. It includes operating system, device drivers, utility programs and language translators.   Q#3: What are the basic operations of a computer system? Ans: Basic Operations of a Computer System:             A computer is a machine that acts accordin...
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Chapter # 04 Class IX

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Data Communication and Computer Networks Q#1: List the properties of a good communication system. Explain any one.    Ans:    1. Delivery   2. Accuracy   3. Timelines   4. Jitter  Accuracy: The system must deliver the data accurately. Data that has been altered during transmission and left uncorrected is not useful.  Q#2: Why OSI model is broken up in layers?  Ans: The OSI model is conceptual. It is broken up into layers so a person can visualize network communications and steps a computer takes when it encapsulates data from the application to the medium.  Q#3: Explain the purpose of Standard Organization.  Ans: Standard Organization develops, coordinates, revises, amends and reissues technical standards. These standards are intended to address the requirements of a group of concerned devices. There are several organizations working on standardization of computing equipment. IEEE, IETF, ITU and ANSI are ...
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