What is a computer network?
a) A device used to display information on a computer screen
b) A collection of interconnected computers and devices that can communicate and share resources
c) A type of software used to create documents and presentations
d) The physical casing that protects a computer’s internal components
The correct answer and explanation is:
The correct answer is b) A collection of interconnected computers and devices that can communicate and share resources.
A computer network refers to a system that connects multiple devices, such as computers, printers, servers, and other electronic devices, enabling them to communicate and share resources. These resources may include data, applications, storage, and internet connectivity. Networks can be of various scales, from a small Local Area Network (LAN) within a home or office to vast Wide Area Networks (WANs) that span across cities or even globally, like the internet.
The essential components of a network include the devices (also called nodes), the transmission medium (such as cables, fiber optics, or wireless signals), and protocols that govern how data is transmitted and received. Examples of network devices include routers, switches, modems, and access points.
One primary function of a computer network is to enable resource sharing. For example, multiple users can access a shared printer, use shared storage devices, or access a centralized database. Networks also facilitate communication between users through email, messaging apps, or video calls, which would be difficult or impossible without interconnecting devices.
Security is another critical aspect of computer networks. Ensuring that data is transmitted securely and that unauthorized users are prevented from accessing the network is essential. This is done through encryption, firewalls, and various authentication protocols.
In modern society, computer networks are indispensable for daily operations in businesses, schools, governments, and personal use. Without networks, the convenience of services like cloud storage, online shopping, and remote work would not exist. The development and management of networks are crucial skills in the field of Information Technology (IT).