Learning Unit 4: Networks, The Internet and World-Wide Web

What critical infrastructure does the Internet provide for organizations?

The Internet provides a means for delivering and accessing information and services.

What are the fundamental components necessary for a telecommunication system?

The components must be carefully selected and work together effectively to enable the achievement of personal and organizational objectives.

How has the World Wide Web evolved since its inception?

Originally developed as a document management system, it has grown to become a primary source of news, commerce, and social interaction.

What is Telecommunications defined as?

The electronic transmission of signals for communications, by means such as telephone, radio, and television.

What are the possible types of telecommunication media?

Guided transmission (twisted-pair wire, coaxial cable, fiber-optic cable, broadband over power lines) and wireless transmission (microwave, radio, infrared).

What characterizes a computer network?

A computer network consists of communications media, devices, and software needed to connect two or more computer systems or devices.

What is the difference between centralised and decentralised processing?

Centralised processing occurs in a single location with a single managed computer, while decentralised processing occurs at various remote locations with isolated systems.

What is a client in a client/server system?

A client is any computer (often a personal computer) that sends messages requesting services from the servers on the network.

What is a communications protocol?

A set of rules that governs the exchange of information over a communications channel, ensuring fast, efficient, error-free communications.

What is the World Wide Web?

A collection of tens of thousands of independently owned computers that work together as one in an Internet service.

What are intranets and extranets?

An intranet is an internal company network built using Internet standards, while an extranet allows selected externals access to the intranet.

What does HyperText Markup Language (HTML) do?

HTML is the standard page description language used for designing and formatting Web pages.

What are examples of Internet applications?

World Wide Web, e-mail, FTP, Telnet, Intranets, and Extranets.