Which factor classifies a host as a server?the network connectionthe CPU speedthe amount of memorythe software installed

The factor that classifies a host as a server is primarily the software installed. While the network connection, CPU speed, and amount of memory can impact a server's performance and efficiency, it is the specific software (like server operating systems, applications, and services) that fundamentally defines the role of a host as a server. Servers utilize software designed to manage network resources and provide services to other computers (clients), such as file storage, web hosting, databases, and applications.

For instance, a machine running a web server software like Apache or Nginx is classified as a server due to its capability to handle requests from client devices and deliver web content accordingly, regardless of the hardware specifications. In essence, while hardware attributes are important, the installed software determines the server's functionality and purpose within a network.