Client server models
The reference models demonstrated a standard way for data communication between two nodes. Of course by now, we all know that not all nodes are created equally. Even in its DARPA-net days, there were workstation nodes, and there were nodes with the purpose of serving content to other nodes. These units typically have higher hardware specification and are managed more closely by the engineers. Since these nodes provide resources and services to others, they are typically referred to as servers. The servers are typically sitting idle, waiting for clients to initiate requests for its resources. This model of distributed resources that are "asked for" by the client is referred to as the Client-server model.
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