Third lecture

Section 1.4 from the textbook was presented (unannounced during second lecture). Next lecture recommended reading is section 2.2 from the textbook. For the reading impaired I have found there is a video of the lecture too. World Wide Web service will be presented as our first case of distributed application. Most likely we will use a couple of lectures to cover the whole thing.

For reviewing Chapter 1 content I have also found Professor Todd Booth video content interesting.

Homework exercises due next Friday

R1. What is the difference between a host and an end system? List the types of end systems. Is a Web server an end system?

R2. What is a client program? What is a server program? Does a server program request and receive services from a client program?

R3. Why is it said that packet switching employs statistical multiplexing? Contrast statistical multiplexing with the multiplexing that takes place in TDM.

R4. How long does it take a packet of length 1,000 bytes to propagate over a link of distance 2,500 km, propagation speed 2.5 · 108 m/s, and transmission rate 2 Mbps? More generally, how long does it take a packet of length L to propagate over a link of distance d, propagation speed s, and transmission rate R bps? Does this delay depend on packet length? Does this delay depend on transmission rate?