P1. True or False? a) A user requests a Web page that consists of some text and three images. For this page, the client will send one request message and receive four response messages. b) Two distinct Web pages (for example, www.mit.edu/research.html and www.mit.edu/students.html ) can be sent over the same persistent connection. c) With nonpersistent connections between browser and origin server, it is possible for a single TCP segment to carry two distinct HTTP request messages. d) The Date: header in the HTTP response message indicates when the object in the response was last modified. e) HTTP response messages never have an empty message body. P7. 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 at n DNS servers are visited before your host receives the IP address from DNS; the successive visits incur an RTT of RTT 1 , . .., RTT
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Web page, World Wide Web, Web server, HTTP response message, distinct HTTP request, HTTP response messages