When TCP uses PUSH to send packets one after the other, is flow control required?
1 Answer
TCP uses flow control at all times. Whether the PSH flag is used is irrelevant.
When the PSH flag is set it makes the source's stack send the pushed segments immediately, without any waiting for more data to fill an MSS-sized segment. Also on the destination, the buffer is passed to the application without any delay, regardless of buffer fill ratio.
