08-02-2014, 02:36 PM
Suppose a FIN message, sent to shut down the first connection btw two machines on Internet, is duplicated and delayed until a second connection btw the same two machines has been established. If a copy o f the old FIN is delivered, will TCP terminate the new connection?
Answer: No
The message for the new TCP connection would be required to have identical source & destination IP addresses, protocol port numbers and TCP sequence numbers for the earlier message to have an effect.
The host waits 2 * max_segment_life time before reallocating the port from the old connection.
Most of the s/w implementation of TCP allocate sequence number depending upon the system clock time, which will be different for two subsequent messages.
Answer: No
The message for the new TCP connection would be required to have identical source & destination IP addresses, protocol port numbers and TCP sequence numbers for the earlier message to have an effect.
The host waits 2 * max_segment_life time before reallocating the port from the old connection.
Most of the s/w implementation of TCP allocate sequence number depending upon the system clock time, which will be different for two subsequent messages.
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