The Simple Service (For Synchronous Receive/Send) protocol is used by receive and send tasks for two-way synchronous information exchange. The receive task, which can start or join a process, has a corresponding send task, which itself is configured to correlate with the receive task.
Receive tasks that use the Simple Service (For Synchronous Receive/Send) protocol do not have subscription filters. This protocol represents two-way messaging with specified sender and receiver, so filtering is not necessary. For more information about receive tasks, see
About Receive Tasks.