What is a client-server model/architecture?
Highly simplified, a client-server model is a process that involves two
computer programms, in which one programme, the client, makes a request to the
one playing the role of the server, which can satisfy the request.
Although the client/server idea can be used by programs within a single computer, it is a
more important idea in a network. In a network, the client/server model provides
a convenient way to interconnect programs that are distributed efficiently
across different locations.