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Slow start algorithm in TCP

Slow start algorithm in TCP, i dont understand parts of a graph

BujarM	15 Apr, 2009 - 03:10 PM Post #1
New D.I.C Head Joined: 6 Feb, 2007 Posts: 22 My Contributions	this question graph was on an old test, i copied this myself on paint, the graph is correct just sorry for the look, i understand what happens at time: t1, t2, t5, but what causes t3? ( i cant think of the right reason ) ( maybe a "choke packet" to decrease transmission by X%?) please give me ideas?
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kingfeanor	RE: Slow Start Algorithm In TCP 18 Apr, 2009 - 03:50 PM Post #2
New D.I.C Head Joined: 18 Apr, 2009 Posts: 3 Thanked: 1 times My Contributions	Check MSDN: Slow Start and Congestion Avoidance for the answer. The short is QUOTE Even with the use of the slow start algorithm, congestion can still occur on a connection at any time during transmission. If this happens, as shown by the need to retransmit data, the TCP stack acts under the assumption that network congestion is the cause. In this situation, TCP uses a combination of the slow start and congestion avoidance algorithms to reset the send window size temporarily. On Windows Server 2003 and Windows XP, the congestion avoidance algorithm resets the receive window to half the size of the send window at the point when congestion occurred.
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