Lecture09 - Tuesday, April 29 It's not just a right, it's a...

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1 Tuesday, April 29 It’s not just a right, it’s a responsibility Last chance to register to vote in the Oregon Primary Election:  5:00  pm today! Must register party affiliation to vote for presidential candidate Download form http://www.oregonvotes.org/votreg/sel500.pdf Deliver (before 5:00 pm) to Benton County Courthouse 120 NW 4th St. Room 13 Democratic HQ 958-B N.W. Circle Blvd Republican HQ 980 NW Circle Blvd. Post Office?
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2 Tuesday, April 29 Midterm #1 Scores are posted (curved) Pick up Lab#2, Homework #1 Scores are posted Lab #3 Report is due Friday, May 2 TAs have office hours on Thursday/Friday Homework #2 Hardcopy due Thursday, May 1 (BOC) Make a copy for yourself (for discussion in class) Program #1 Due Friday, May 9 Evaluation criteria are posted
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3 Today’s topics Transmission Control Protocol (TCP) Flow control Congestion control
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4 Transport Protocols: the story so far … Defined principles of RDT (reliable data transfer) Incrementally developed (rdt1.0 – rdt3.0) Half-duplex data, full-duplex control Error detection/handling Packet loss handling Acknowledgement Retransmission Increased utilization  Stop-n-Wait vs Pipelined protocols
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5 The next step: TCP Based on rdt3.0 How to handle other reliability problems Establish connection Congestion control Flow control Out-of-order delivery Etc.
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6 TCP: Overview    RFCs: 793, 1122, 1323, 2018, 2581 full duplex data: bi-directional data flow in same  connection MSS: maximum segment size connection-oriented:   handshaking (exchange of  control msgs) init’s sender,  receiver state before data  exchange flow controlled: sender will not overwhelm  receiver point-to-point: one sender, one receiver   reliable, in-order byte steam: no “message boundaries” pipelined: TCP congestion and flow control  set window size send & receive buffers s o c k e t d o o r T C P s e n d b u f f e r T C P r e c e i v e b u f f e r s o c k e t d o o r s e g m e n t a p p l i c a t i o n w r i t e s d a t a a p p l i c a t i o n r e a d s d a t a
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7 TCP segment structure source port # dest port # 32 bits application data  (variable length) sequence number
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This note was uploaded on 06/28/2009 for the course CS 372 taught by Professor Leviet during the Fall '07 term at Oregon State.

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Lecture09 - Tuesday, April 29 It's not just a right, it's a...

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