What is the definition of a network?

A network is defined as a group of two or more devices connected for the purpose of exchanging information. This definition encompasses a wide range of configurations and types of connections, including wired and wireless systems, which enable devices to communicate and share resources. In the context of technology, these devices can be computers, smartphones, printers, servers, or any devices capable of sending and receiving data.

The fundamental purpose of a network is to facilitate communication and data sharing between connected devices, allowing for enhanced collaboration, resource sharing, and access to services and information across different locations. This connectivity can take many forms, from local area networks (LANs) to wide area networks (WANs) and even the global internet.

In contrast, the other choices do not accurately capture the essence of what constitutes a network. A system for backing up data pertains more to data management rather than connectivity. A collection of applications on a device focuses on software, rather than the connectivity between devices. An internet service provider's infrastructure describes the physical framework that enables internet access, rather than the inter-device connectivity that characterizes a network.