(Question 21 from Chapter 2 of Computer Networking by Kurose &Ross, 5th edition)
ID: 3614161 • Letter: #
Question
(Question 21 from Chapter 2 of Computer Networking by Kurose &Ross, 5th edition)Suppose that your department has a local DNS server for allcomputers in the department. You are an ordinary user (i.e., not anetwork/system administrator). Can you come up [with] a way todetermine if an external Web site was very likely accessed from acomputer in your department a couple of seconds ago? Explain.
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Now, I'm fairly familiar with how DNS servers work, but I'm notsure whether there's any way to find a "last accessed time" orsomething similar. Could I theoretically visit the same website andcheck some packets coming from the local DNS server? I'm not surein which direction to head with this question.
Explanation / Answer
C:> ipconfig /displaydns
By typing this command in the command prompt, we get theinformation showing the fields like record name, type, time tolive, data length etc., for each of the website that was accessedfrom a particular computer.
Looking at that information, we can determine the externalwebsite that was accessed frequently.
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