lec-20 - What's Next. Transport Layer TCP Overview Error...

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20 Sept 2008  BITS C481 (Computer Networks) 1 What’s Next… Transport Layer TCP Overview Error Recovery Mechanism in TCP Flow Control Congestion Control
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20 Sept 2008  BITS C481 (Computer Networks) 2 Error Recovery Mechanism of TCP[1] Q. Is TCP a GBN or an SR protocol? TCP Acks are cumulative and correctly received Out of order segments are not individually Acked by the receiver Maintains Sendbase and NextSeqNum So far how TCP looks like???
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20 Sept 2008  BITS C481 (Computer Networks) 3 Error Recovery Mechanism of TCP[2] Many TCP implementations buffer correctly received but out of order segments Another modification to TCP called as Selective Acknowledgement Now its looks like SR Conclusion: TCP’s error recovery mechanism categorized as a hybrid of GBN and SR protocols
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20 Sept 2008  BITS C481 (Computer Networks) 4 TCP Flow Control Receive side of TCP connection has a receive buffer: RcvWindow = RcvBuffer-[LastByteRcvd-LastByteRead] Application process may be slow at reading from buffer Speed-matching service: matching the send rate to the receiving app’s drain rate sender won’t overflow receiver’s buffer by transmitting too much, too fast flow control
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This note was uploaded on 07/20/2009 for the course INFORMATIO BITS C481 taught by Professor Prof.virendrasinghshekhawat during the Fall '08 term at Birla Institute of Technology & Science, Pilani - Hyderabad.

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lec-20 - What's Next. Transport Layer TCP Overview Error...

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