On the 16th July 2022 at 13:01:22, PC A visited the website whatanexam.com. To access thewebsite, the local DNS server replied to PC A’s DNS request with (whatanexam.com,100.3.40.56, A, 48), where TTL is given in hours. The local DNS server used iterative DNSlookup, with an RTT of 55 ms each, to retrieve the IP address for PC A. Next, on the 19th ofJuly at 11:01:23, PC A visited the same website.I. Determine the total RTT for PC A to fetch the IP address on 19th of July.After fetching the IP address, PC A sends the request to the website server (which takes 35msto be sent) to open a persistent HTTP connection with the server. and request 21 objects,including the base HTML page, each requiring 125ms to be downloaded.II. Calculate the total RTT required to fetch all the objects after retrieving the IP addressIII. Calculate the total time PC A takes to load the webpage.
On the 16th July 2022 at 13:01:22, PC A visited the website whatanexam.com. To access the
website, the local DNS server replied to PC A’s DNS request with (whatanexam.com,
100.3.40.56, A, 48), where TTL is given in hours. The local DNS server used iterative DNS
lookup, with an RTT of 55 ms each, to retrieve the IP address for PC A. Next, on the 19th of
July at 11:01:23, PC A visited the same website.
I. Determine the total RTT for PC A to fetch the IP address on 19th of July.
After fetching the IP address, PC A sends the request to the website server (which takes 35ms
to be sent) to open a persistent HTTP connection with the server. and request 21 objects,
including the base HTML page, each requiring 125ms to be downloaded.
II. Calculate the total RTT required to fetch all the objects after retrieving the IP address
III. Calculate the total time PC A takes to load the webpage.
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