计算机网络课后习指导 陕西师范大学 2. 111E14 1. 1语 从ww.stella-net.net(France)到ww.polv.ed(USA)的Traceroutes 在三个时间段内的平均往返时延分别是87.09ms,86.35ms和86.48ms,标准方差分别为 0.53m5,0.18ms,0.23m5。在这个例子中，在三个时段各自路由器数量均为11个，在 这些时段中路径未发生变化，Traceroute分组在源P地址和目的P地址之间经过了3个ISE 网络。是的， 在相邻的1SP网络间对等接口处出现了最大的时延。 P19.(a)Visit the sitewwracerouteor and perform traceroutes from twodifferent cities in France to the same destination host in the United States.How many links are the same in the two traceroutes? Is the transatlantic link the same? (b)Repeat (a)but this time Franceand another cityi Gemany (c)Pick a city in the United States,and perform traceroutes to two hosts,each in a different city in China.How many links are common in the two traceroutes?Do the two traceroutes diverge before reaching China? 实验结果如下：计算机网络课后习题指导 陕西师范大学 10 从 www.stella-net.net (France) 到 www.poly.edu (USA)的 Traceroutes 在三个时间段内的平均往返时延分别是￾￾. ￾￾￾￾，￾￾. ￾￾￾￾和￾￾. ￾￾￾￾，标准方差分别为 ￾. ￾￾￾￾，￾. ￾￾￾￾，￾. ￾￾￾￾。在这个例子中，在三个时段各自路由器数量均为 11 个，在 这些时段中路径未发生变化。Traceroute 分组在源 IP 地址和目的 IP 地址之间经过了 3 个 ISP 网络。是的，在相邻的 ISP 网络间对等接口处出现了最大的时延。 P19. (a) Visit the site www.traceroute.org and perform traceroutes from two different cities in France to the same destination host in the United States. How many links are the same in the two traceroutes? Is the transatlantic link the same? (b) Repeat (a) but this time choose one city in France and another city in Germany. (c) Pick a city in the United States, and perform traceroutes to two hosts, each in a different city in China. How many links are common in the two traceroutes? Do the two traceroutes diverge before reaching China? 实验结果如下：