Q#3: (3 points)

Using a Web browser, you visit the web site for www.hamburger.com The base HTML

page for the main page www hamburger com is 20,000 bits Once the base HTML page is

fetched, it contains URL references for the following embedded images:

• http://www.hamburger.com/burger banner.jpg 15,000 bits
• http://www.hamburger.com/lettuce.jpg 5,000 bits
• http://www.hamburger.com/mmm bacon.jpg 10,000 bits
• http://www.hamburger.com/veggie.jpg 10,000 bits
• http://www.hamburger.com/disclaimer.txt 5,000 bits
• http://www.hamburger.com/royale with cheese.jpg 42,000 bits

Your Web browser uses the HTTP protocol to download the base page and the embedded objects. Make the following assumptions:

1. At most 10,000 bits of data fits into a single packet. You can ignore the overhead of any headers or framing.
2. You must first download the entire base page before you can start fetching the embedded images.
3. HTTP requests are 1,000 bits in size.
4. Any new connection to a machine requires a connection establishment handshake.
5. For this problem, you do not need to worry about closing connections, and you can ignore the delay introduced in acknowledging the final data packet sent by the server to your browser.
6. All senders use windows of 20,000 bits.
7. No packets are lost.

Answer following:

1. Explain initial transfer of home page and how many RTT required?
2. In terms of RTT, how quickly your browser downloads the base page for www.hamburger.com and all the embedded objects under following conditions:

1. One connection per item, with up to 4 concurrent connections.
2. A single persistent, non-pipelined connection.
3. A single pipelined connection.