Specific Observations:Bethesda

The number of hops on the route to this site is typically 12, even though the University of Maryland and this site are located in the same metropolitan area. The losses to this site are low when compared to Taiwan, Italy and Mexico. The losses normally vary from 0.05% to 2.66%. The percentage of losses is comparable to Chicago and Canada. In one of the experiments, the losses were 6.9%.

The range of loss percentage for the other sites is given below:

Canada: 0.01% to 1.35%
Chicago: 0.0% to 2.33%
Mexico: 0.075 to 18.02%
Italy: 0.77% to 40.08%
Taiwan: 1.26% to 15.22%

The average RTT value for this site ranges from 0.015 sec to 0.025 sec. This is very low when compared to the range of average RTT value for the other sites:

Canada: 0.039 to 0.089 sec
Chicago: 0.121 to 0.198 sec
Mexico: 0.122 to 0.411 sec
Italy: 0.232 to 0.923 sec
Taiwan: 0.309 to 0.432 sec

The route to this site remains almost the same. The minimum RTT value is fairly constant and low, and was around 0.011 sec. The average value of RTT is around the minimum RTT value most of the time, suggesting that there are not many packets with high RTT values. Maximum RTT values range from 0.241 sec to 1.156 sec. Average RTT value is around 0.02 sec. Even when the maximum RTT is high, there are not many packets with values near the high RTT value. The number of reordered packets in our experiments ranges from 1 to 33. The losses are typically highest at 14:00, which can be explained by the increased traffic. The periodic behavior of the peaks in the round trip times is most pronounced to this site. It can be observed that there are multiple periods of high values of round trip times. We observe that the losses in the experiments to this site are isolated. There were very few consecutive losses.

Some of the interesting graphs for this site can be found here.

[Bethesda] [Canada] [Chicago] [Mexico] [Italy] [Taiwan]

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