Suppose within your web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that n DNS servers are visited before your host receives the IP address from DNS: the successive visits incur an RTT of RTT,...,RTT,. Further suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Let RTT, denote the RTT between the local host and the server containing the object. Assuming zero transmission time of the object, how much time elapses from when the client clicks on the link until the client receives the object? PSA suppose you can access the caches in the local DNS servers of your department Can you propose a way to roughly determine the Web servers (outside your department) that are most popular among the users in your department? Explain. PIS Consider distributing a file of F 15 Gbits to N peers. The server has an upload rate of u 30 Mbps, and each peer has a download rate of di 2 Mbps and an upload rate or u. For N = 10, 100, and 1,000 and = 300 Kbps, 700 Kbps, and 2 Mbps, prepare a chart giving the minimum distribution time for each of the combinations of N and u for both client-server distribution and P2P distribution