TCP Tahoe and Reno.
Assume a TCP connection is established over a 1.2 Gbps link with an RTT of 4 msec.
Assume that when a group of segments is sent, only a Single Acknowledgement is
returned (i.e. cumulative). We desire to send a file of size 2MByte. The Maximum segment
length is 1 Kbyte. Congestion occurs when the number of Bytes transmitted exceeds the
Bandwidth x Delay product (expressed in Bytes). Two types of TCP congestion control
mechanisms are considered. For each type sketch the congestion window vs. RTT
a. TCP implements AIMD (with NO slow start) starting at window size of 1 MSS. When
congestion occurs, the window size is set to half its previous value. Will congestion
occur? If Yes, when? If No, why not? Find the throughput of the session and the link
utilization in this case.
b. TCP implements slow start procedure ONLY (i.e. No congestion avoidance phase).
Again it starts with a window size of 1 MSS and doubles every RTT. When congestion
occurs, the window size is reset to 1 MSS again. Will congestion occur? If Yes, when?
If No why not? Find the throughput of the session and the link utilization in this
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