Client-Server Interaction
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Client-Server interaction is characterized by a strict separation between the service requester (Client) and service provider (Server). Communication in a Client-Server communication system is initiated by a Client requesting a specific service from the communication system (Service Request).

The communication system informs the relevant service provider (server) of the service request by a service indication. The server reacts to the service indication with the relevant service response. Afterwards, the communication system informs the client with the service confirmation that the service has been completed.

Data may be transmitted both in the framework of the service request from client to server and in the framework of the service response from server to client. In the case of unconfirmed services, the service response and service confirmation are omitted. Client-Server interaction might be used in the context of configuration and diagnostics of bus nodes, for example.