HTTP and the web

Next class reading is section 2.2 of the book.

The inner workings of the World Wide Web service will be presented.

Homework

Two end-systems (A& B) communicate through a packet switching network. There are two routers (R1 & R2) between the two end-systems. All links are 1Mbps. Host A sends 1 MByte of data to B using 520 bits packets. Each packet has a header of 20 bits.

1. How long does it take since transmission starts in Host A till the last bit has been received by Host B? (Consider propagation delay, processing and queueing delays negligible).
2. What is the end-to-end throughput?
3. Repeat questions 1&2 if propagation delay is 1 millisecond on each link.