Question: 2. Why does the TCP sender congestion window increase and decrease time by time? TCP congestion control: additive increase multiplicative decrease approach: sender increases transmission

2. Why does the TCP sender congestion window increase and decrease time by time? TCP congestion control: additive increase multiplicative decrease approach: sender increases transmission rate (window size), probing for usable bandwidth, until loss occurs additive increase: increase cwnd by I MSS every RTT until loss detected multiplicative decrease: cut cwnd in half after loss additively increase window size until loss occurs (then cut window in half) AIMD saw tooth behavior: probing for bandwidth 83 time
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