Tcp and ip stack, Operating System

What does the last four digits '0010' of the above dump represent? What action will the Destination node takes when it receives this packet?

The last four digits '0010' denotes Urgent pointer.

The Urgent Pointer is used when some information has to reach the server ASAP. When the TCP/IP stack at the other end sees a packet using the Urgent Pointer, it is duty bound to stop all it's doing and immediately send this packet to the relevant server.

This causes TCP in the source node to immediately transmit all data in the byte stream and to set the Push flag to one in the final packet. Upon receiving a packet with the Push flag set to 1, TCP in the destination node immediately forwards all data in the byte stream to the required ULPs

 

Posted Date: 3/14/2013 2:09:41 AM | Location : United States







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