Suppose you visit a website using the browser. 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 your local DNS server is ip-srv1.vanderbilt.edu and the round-trip time (RTT) from your local DNS server is denoted as RTT_dns_local. The local DNS server performs iterative queries to a Root DNS server, a TLD DNS server and an Authorative DNS server. The round-trip time from the local DNS server to these DNS servers are denotd as RTT_dns_root, RTT_dns_tld, and RTT_dns_auth, respectively. Suppose that the round-trip time from your local host to this website is RTT_web. Further suppose that the web pass you visit is short, so that its transmission time of the page can be omitted. The web page references 8 small image objects hosted on the web site. Lets assume zero transmission time for the image objects as well. how much time elapse from when you click on the link until the web page is fully displayed (with all image objects) on your browser? Consider the following scenarios and provide your solutions respectively.
This question is marked "community wiki". asked 12 May '12, 00:42  sanjit |
One Answer:
The question cannot be answered as this is unknown:
BTW: don't you think your teacher/professor will also read this forum and detect your attempt to cheat? ;-)) EDIT: As the question is all about DNS, I recommend reading/watching this:
Regards answered 12 May '12, 01:00  Kurt Knochner ♦ edited 12 May '12, 02:12 |
Another Homework assignment?!
The wording says it all...