Flags
Tuesday, June 2, 2009
P=Push Flag Reserved U|A|1|R|S|F
If set , data should be sent through the outgoing and incoming tcp buffer space without being held
[Packet will be flushed very fast out of tcp buffer . Tcp buffer is created when ever a tcp session get initialised]
getting push bit -> may be it has some thing to do with our voice packet priorities
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S=Syn Reserved U|A|P|R|1|F
This is only used in the first two packets of the handshake process . This is used to inform the other side of the ISN (Initial sequence number)
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F=Fin U|A|P|R|S|1
This is sort of interesting flag type . this if set , sender indicates that they are completed with a connection but they dont want to explicitly close or tear down the connection (they = two sides server and client)