This illustration is presented as a graph. The x-axis is labeled "Transmission round;" it begins at 0 and moves in increments of one to 15. The y-axis, labeled "Congestion window (in segments)," begins at 0 and moves in increments to two to 16. A dashed line, labeled "ssthresh," begins at 0 on the x-axis and 8 on the y-axis and moves horizontally to the right. At 8 on the x-axis, the dashed line shifts to 6 on the y-axis, and moves horizontally along the x-axis to 15.

TCP Tahoe is represented by a series of plotted points in blue along the graph. The first appears at 1 on the x-axis and about 1 on the y-axis, before moving to 2 on the x- and y-axes, then 3 on the x-axis and 4 on the y-axis. From there it jumps to 4 on the x-axis and 8 on the y-axis, hitting the threshold. From there it moves diagonally upward until it hits 12 on the y-axis at 8 on the x-axis, and then falls sharply to 1 on the y-axis at 9 on the x-axis. From there it climbs to 6 on the y-axis at 12 on the x-axis before ending just under 10 on the y-axis and 15 on the x-axis.

TCP Reno is represented by a series of plotted points in black. The first appears at 9 on the x- and y-axes. They move steadily upwards and to the right at a 45-degree angle, ending at 15 on the x- and y-axes.