Which of the following best defines a network?

The definition of a network is best captured by stating it is a number of interconnected devices or operations. This perspective encompasses the key characteristics of networks, which involve multiple devices or nodes communicating and sharing resources with one another. In a network, these devices can include computers, servers, switches, and routers, all of which work in conjunction to facilitate data exchange and collaborative functionalities.

Understanding this definition is crucial for recognizing how networks form the backbone of modern computing and communication systems. A network enables the sharing of files, internet access, and various services among users and devices, thus enhancing efficiency and connectivity in both personal and professional environments.

In contrast, other options pose limitations on the definition of a network. For instance, a single computer performing a task or an isolated system for computation highlights an individual entity without the interaction and connectivity that define a network. Furthermore, a software application used for communication does not encapsulate the hardware aspects and interconnections intrinsic to networks, focusing instead on specific functionalities that may occur within a network rather than the network itself.