cis-145: networking

answer 4-

4. Examine the output and find the point in the route when messages started jumping across the ocean. By what percentage does the RTT increase after the jump compared with before it? You can see an example in Figure 3-37. To calculate the percentage for this jump, select a time from just after the jump (129, for example) and divide it by a time from just before the jump (such as 27), then multiply by 100 percent: 129/27100%=478%. In this case, the sample data yields a 478 percent increase. It takes nearly five times as long for a message to go round-trip across the Atlantic from the United States to London, England (the location of this first European router) as it does for a message to travel round trip between two servers that are both located on the U.S. East Coast (this local computer and the last U.S. router in the route). Answer: Answers may vary and should be significantly above 100 percent. Figure 3-37