Homework#1.6 Objective 6: Able to fully understand HTTP Key points HTTP has two versions so far: 1.0 and 1.1 HTTP 1.0: TCP connection is not persistent, that is, to retrieve any object, a new TCP connection is made and then is terminated HTTP 1.1: Support persistent TCP connection in that the same connection is used to retrieve multiple objects if necessary TCP uses a three-way handshake to establish a new connection, which adds a round trip delay by itself Problem: Suppose within your Web browser you click on a link to obtain a Web page. The IP address for the associated URL has already been cached in your local host so a DNS look-up is unnecessary. Suppose that the Web page associated with the link contains some HTML text and 20 jpeg images that are hosted on the same Web server. Let RTTO denote the RTT between the local host and the Web server. Assuming 0 transmission time of the HTML text and the embedded images, calculate how much time elapses from when the client clicks on the link until the client receives the Web page (HTML text and the embedded images) under the following scenarios: a) HTTP 1.1 with pipelining (and with persistent connection) b) HTTP 1.1 without pipelining (and with persistent connection) Homework#1.6 Objective 6: Able to fully understand HTTP Key points HTTP has two versions so far: 1.0 and 1.1 HTTP 1.0: TCP connection is not persistent, that is, to retrieve any object, a new TCP connection is made and then is terminated HTTP 1.1: Support persistent TCP connection in that the same connection is used to retrieve multiple objects if necessary TCP uses a three-way handshake to establish a new connection, which adds a round trip delay by itself Problem: Suppose within your Web browser you click on a link to obtain a Web page. The IP address for the associated URL has already been cached in your local host so a DNS look-up is unnecessary. Suppose that the Web page associated with the link contains some HTML text and 20 jpeg images that are hosted on the same Web server. Let RTTO denote the RTT between the local host and the Web server. Assuming 0 transmission time of the HTML text and the embedded images, calculate how much time elapses from when the client clicks on the link until the client receives the Web page (HTML text and the embedded images) under the following scenarios: a) HTTP 1.1 with pipelining (and with persistent connection) b) HTTP 1.1 without pipelining (and with persistent connection)