Final answer:
Host-based processing is when a mainframe or central server does nearly all of the computational work, with clients primarily handling input and output.
Step-by-step explanation:
The processing referred to in the question is Host-based processing. This type of processing is characteristic of a traditional mainframe environment where the central server, or host, performs almost all of the computational work. In host-based architectures, clients typically have thin-client functionality, mainly handling input and output but relying on the host for the actual processing of data.
Host-based processing refers to the traditional mainframe environment in which all, or virtually all, of the processing is done on a central host. This means that the central host computer handles all the computing tasks and the users access the resources through terminals. The clients or users do not have any processing power themselves and rely on the central host for all their computational needs.