Suppose the IP address for the URL of a Web link that youve just clicked is not cached in your local host so a DNS lookup is necessary to obtain the IP address. Suppose that n DNS servers are visited for finally resolving the IP address from DNS, and the successive visits incur a round-trip time of RTT1, ..., RTTn. Also suppose that the Web page you are visiting contains only one small base object, which is HTML text, which also references eight small objects on the same server. Let RTT0 be the round-trip time between the local host and the server containing the object. If you ignore transmission times for the objects:

(a) How much time elapses from when you click the Web link till you receive the object, if you use non-persistent HTTP with no parallel TCP connections?

(b) How much time elapses from when you click the Web link till you receive the object, if you use non-persistent HTTP with the browser configured for 5 parallel TCP connections?

(c) How much time elapses from when you click the Web link till you receivethe object, if you use persistent HTTP?