What is a computer network?
(a) A device used to display information on a computer screen
(b) A collection of interconnected computers and device 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 of interconnected devices that are capable of exchanging data and resources with one another. This includes computers, printers, servers, routers, switches, and other network-enabled devices. The primary purpose of a computer network is to enable communication between devices and facilitate the sharing of resources such as files, applications, or internet access.
There are different types of computer networks based on their size, scope, and the technology they use. For instance, a Local Area Network (LAN) is used to connect devices within a small geographical area, like a home or office. In contrast, a Wide Area Network (WAN) covers a larger geographic region, such as a city or country. The internet itself is a vast global network of interconnected devices, forming a type of WAN.
One of the key functions of computer networks is resource sharing. Devices on a network can share printers, storage devices, and other peripherals, which increases efficiency and reduces the need for redundant hardware. For instance, in an office setting, multiple computers can access a single printer connected to the network rather than each having its own printer.
Additionally, computer networks enable communication in various forms, including email, voice over IP (VoIP), and video conferencing. They use protocols such as Transmission Control Protocol/Internet Protocol (TCP/IP) to ensure that data is transmitted securely and reliably between devices.
Without networks, the modern internet-based communication and information sharing would not be possible. A computer network forms the backbone of many critical systems in business, education, healthcare, and entertainment.