Assume that a user wants to download from a server a web page that references 3 objects. The base page and each of the objects are of the same size that requires 20 ms transmission time over the path from server to host. The RTT between the host and the server is 50 ms. Assume that the IP address of the server is known to the host (i.e. the host's DNS cache has a valid entry for the server) and that the host uses only a single TCP connection to a particular server at any given time.
a) What is the total time needed to download the page when non-persistent HTTP is used?
b) What is the time needed to download the page when persistent HTTP is used?