Question: Suppose within your Web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached

Suppose within your Web browser you click on a link to obtain a Web page. 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 three DNS servers are visited before your host receives the IP address from DNS.

The followings are the RTT as seen at the local host:

The first DNS server (the local DNS cache) RTT is 4 msecs.

The second DNS server RTT is 25 msecs.

The third DNS server RTT is 30 msecs.

The HTTP server RTT is 50 msecs.

Suppose that the Web page associated with the link consists of only a small amount of HTML text and does not reference any other object.

Assuming zero transmission time for the HTML object, how much time in milliseconds elapses from when the client clicks on the link until the client receives the web page?

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