A process-based DO/S must synchronize actions across the network. When a process reaches a point at which it needs service from
an external source, such as an I/O request, it sends a message searching for the service. While it waits for a response, the processor server puts the process in a ____ state.
Based on the information provided within the question it can be said that the processor server puts the process in a WAIT state. In other words it temporarily pauses the server from taking any action until the message from the service request comes back with a response. Once that happens it receives new instructions and is resumed.
