Please solve it correctly with a proper explanation of the calculation.  Question: Given, you want to visit “welcomebacktophysicalexams.com”. Your network has a local DNS server and is using a recursive lookup to fetch IP addresses and RTT of 29 ms. Others in your network have already visited the above website a few hours before your visit. After fetching the IP address, your PC sends a non-persistent HTTP request of size 109 bytes to bring 13 objects of size 31 bytes each. In this particular connection, it requires the PC 67ms to send the TCP request to the server. I. What is the total RTT in ms in the DNS lookup? II. What is the total RTT in ms required (including DNS) to bring the full object to your PC? III. What is the total file transmission time in ms after fetching the IP address?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Please solve it correctly with a proper explanation of the calculation. 

Question:

Given, you want to visit “welcomebacktophysicalexams.com”. Your network has a
local DNS server and is using a recursive lookup to fetch IP addresses and RTT of 29 ms.
Others in your network have already visited the above website a few hours before your
visit.
After fetching the IP address, your PC sends a non-persistent HTTP request of size 109
bytes to bring 13 objects of size 31 bytes each. In this particular connection, it requires
the PC 67ms to send the TCP request to the server.

I. What is the total RTT in ms in the DNS lookup?
II. What is the total RTT in ms required (including DNS) to bring the full object to
your PC?
III. What is the total file transmission time in ms after fetching the IP address?

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