17. Information and Communication Technology - Students Free Notes

Explain the different types of communication systems used in modern technology.

Modern technology uses various types of communication systems to facilitate the exchange of information. These systems can be broadly classified based on the medium used, the distance covered, and the technologies involved. Below are some of the key types of communication systems: 1. Wired Communication Systems Twisted Pair Cables: These are the most commonly used … Read more

What is the difference between wired and wireless communication?

Wired communication: Uses physical cables (e.g., copper wires, optical fibers) to transmit data. Wireless communication: Uses radio waves, microwaves, or infrared signals (e.g., Wi-Fi, mobile networks) for data transmission. Related Questions: What is the difference between data and information? Briefly explain the process of transfer of information via radio waves through air. What is the … Read more

Why do we use microwaves in satellite communication?

Microwaves are used because they: Can travel long distances with minimal interference. Have high frequencies, allowing faster data transmission. Penetrate through the Earth’s atmosphere with less distortion. Related Questions: What is the difference between data and information? Briefly explain the process of transfer of information via radio waves through air. What is the difference between … Read more

What is modulation in communication?

Modulation is the process of modifying a carrier wave to encode information for transmission. It allows signals to travel longer distances with minimal loss. Examples include AM (Amplitude Modulation) and FM (Frequency Modulation). Related Questions: What is the difference between data and information? Briefly explain the process of transfer of information via radio waves through … Read more

How does a satellite help in communication?

Satellites receive signals from Earth, amplify them, and retransmit them to different locations. They enable long-distance communication, including TV broadcasting, GPS navigation, and internet services. Related Questions: What is the difference between data and information? Briefly explain the process of transfer of information via radio waves through air. What is the difference between primary and … Read more

What are the advantages of using fiber optic cables in communication?

Fiber optic cables offer: Faster data transmission at the speed of light. Higher bandwidth for more data transfer. Less signal loss over long distances. Immunity to electromagnetic interference. Related Questions: What is the difference between data and information? Briefly explain the process of transfer of information via radio waves through air. What is the difference … Read more

What are word processing software and data managing software? What are their characteristics?

Word Processing Software and Data Managing Software are types of software designed to assist in the creation, manipulation, and organization of information, but they serve different purposes. 1. Word Processing Software Word processing software is used to create, edit, format, and print documents that primarily consist of text. These programs allow users to produce professional-quality … Read more

What is the internet? How has it revolutionized the world?

The internet is a global network of interconnected computers and servers that communicate with each other using standardized protocols. It allows for the exchange of data, information, and services across the world. By connecting billions of devices, the internet facilitates communication, collaboration, and access to vast amounts of knowledge and resources. The internet has revolutionized … Read more

What are different storage devices for computers? Explain!

Storage devices for computers are hardware components used to store data and files, either temporarily or permanently. These devices come in various forms and capacities, catering to different needs for performance, speed, and durability. They can be broadly categorized into primary and secondary storage devices. 1. Primary Storage Devices (Temporary Storage) These devices hold data … Read more

What are telecommunication devices? Explain their way of communication.

Telecommunication devices are electronic equipment that allow communication over long distances by transmitting signals in the form of data, sound, or video. These devices are essential for exchanging information, whether through voice calls, text, or internet services. Types of Telecommunication Devices: Telephones (Mobile & Landline): These are the most common devices used for voice communication. … Read more