Latency = One way delay Round Trip Time = 2x Latency Latency =20ms Latency = 40ms Latency = 2ms Mobile Tower Data Center Dropbox Phone Figure 1: Downloading a File from Dropbox 3) Now imagine another scenario - you are downloading a 100MB file (1KB=1000 bytes). You need 3 round trip time between the phone and Dropbox to set up the connection. Distance of each hop is 300KM. (The distance between your phone and the mobile tower is 300KM, distance between mobile tower and the data center is 300 KM and so on). The speed of light in our links is 300,000KM/sec. Assuming no queuing delay, what is the total end-to-end delay? Show your calculation. 5 pts