Suppose Bob is downloading files from an FTP server by sending a request to the server and the server sends the file to Bob. Suppose Bob’s computer is connecting to the server via point-to-point link. It takes Bob 0.83 seconds to download a 400 MB file and 0.43 seconds to download a 200 MB file.   1. What’s the bandwidth of the link? What’s the RTT? (Note: please use RTT rather than the one-way delay as the propagation delay and you can ignore the transmission delay of the short request and ACK in your calculation.) 2. Please explain why the time to download the 400 MB file is not exactly twice as much as the time to download the 200 MB file?

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