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Class Talkers information site Provide the latest and most accurate information based on syllabus and teachers notes from a wide range of subjects. as a study guide.

Communication Media & Devices

Wireless network: A wireless does not use cables. It uses infrared or microwave radio signals to transmit and receive data. Wireless network are used where cables are inconvenient, for eg. If the network is created among building separated by streets. They are usually more expensive than cable-linked network. Cellular network: Some cellular phones are use… read more »

Efficient data communication

Efficient data communication must be Accurate Timely Cost effective Data communication allows users to transmit and receive data and information. The term media is the collection name for material s(tape, paper, disk) used to hold or transmit data. Communication media refers to the material used to transmit data and includes cables, fibre-opitc cable, radio waves… read more »

Communication Media & Devices

TOPIC:  COMMUNICATION DEVICES AND MEDIA OBJECTIVE:         Distinguish between communication devices and communication media. A communication device- is a physical part that enables one computer to communicate with another. The modem-is a communication device. Communication media– are the links via which the signals are transmitted. Communication media include cables, telephone lines and electromagnetic waves such as… read more »

Words And Thier Meaning

Light pen– is an input device which like the mouse, is used to choose objects on a display screen. Digital Camera-it allows you to take pictures and to store digital photographic images.  A PC Camera- is a digital camera that is attached to the computer. It gets its power from the computer. A PC camera… read more »

A Typical computer(What A Computer Consist OF

A Typical computer The computer case is also called the system unit. It contains the most important part of the system, the central processing unit (also called CPU) or brain of the computer. You cannot see the CPU unless you open the system unit. The system unit also contains other parts, many of which can… read more »

Effects of Land Pollution

• exterminates wild life • acid rain kills trees and other plants. • vegetation that provides food and shelter is destroyed. • it can seriously disrupt the balance of nature, and, in extreme cases, can cause human fatalities. • pesticides can damage crops; kill vegetation; and poison birds, animals, and fish. Most pesticides kill or… read more »