What defines a "server role"?

A "server role" refers to a major function or service that a server performs. This can include various responsibilities such as hosting websites, managing network resources, serving files, or running applications. Each server can be designated to take on a specific role which outlines its primary purpose within the network environment. For instance, a web server role specifically handles HTTP requests, serving content such as web pages.

The other options do not accurately capture the essence of what a server role is. Describing it as a minor service does not encompass the crucial and significant functions that servers provide. Additionally, server roles are not defined as a set of applications installed on a client computer, as this pertains more to client-side functionality rather than server capabilities. Lastly, while hardware and software are essential components of a server, they do not define a "server role" itself, which is more about the operational functions and services provided by the server in a network.