You are able to interrupt or abort the queued stream instead of waiting for the stream to finish. This is done by specifying the data as urgent. This will tell the receiving program to process it immediatly, along with the rest of the urgent data. When finished, TCP informs the application and resumes back to the stream queue. An example is when TCP is used for a remote login session, the user can send a keyboard sequence that interrupts or aborts the program at the other end. These signals are most often needed when a program on the remote machine fails to operate correctly. The signals must be sent without waiting for the program to finish its current transfer.
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