HW2_1

HW2_1 - EE 450 Homework 2 Summer 2011 Nazarian Name: _...

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EE450 Homework 2 Summer 2011 1 EE 450 Homework 2 Summer 2011 Nazarian Name: _______________________ Score:______ Assigned: Wednesday, June 22 Due: Tuesday, June 28 at 2pm (on-campus: EEB340, slide under the door if you don’t find me. Off-campus through DEN.) Midterm II is on the 30 th and we would like to post the solutions two days in advance, therefore late submissions are accepted only if they happen on Tuesday 15%. 1) (15 pts) Within the web browser, a link is clicked to obtain a web page. Suppose that a DNS look-up is necessary to obtain the IP address, because IP address for the associated URL is not cached. Suppose that n+1 DNS servers are visited using an iterative network of DNS servers before your host receives the IP address from DNS: The local DNS sever visit takes an RTT and RTT L . Each of the rest of the (n) servers takes an RTT of RTT R to visit. Further suppose that the Web page associated with the link contains exactly one basic HTML file, containing a small amount of HTML text. Let RTT H denote the RTT between the local host and the server containing the object. Assuming zero transmission delay of the object, how much time elapses from when the client clicks on the link until
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HW2_1 - EE 450 Homework 2 Summer 2011 Nazarian Name: _...

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