Hi every one .
I have a question , now when the TCP persistent timer times out , a probe is sent , Does this probe conatin any application layer data ?? or why its never acked ? and the sequence number used is it differentt from the one used with the data and how it is calculated ??

Thanks in advance

Are you talking about TCP connections on Windows based drivers/apps? If so, there usually is a delayed acknowledgement recieved, then it tries to re-connect.

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