HOMEWORK # 1: Only few of the questions will be selected and graded but you have to answer every question. If you do not answer all the questions, you will not get the full points.

Each answer should be marked clearly as Q1 Answer, Q2 Answer, ... and include the questions also.

Do not copy & paste from Internet. Write them in your own words.

DUE: September 9(Thr), 2010 **Hand in the answers on Vista.   Not via e-mails!**

Q1: Our textbook(Computer Networking: A TOP-DOWN APPROACH FEATUREING THE INTERNET(4th ED.)) uses "top-down" approach rather than the traditional "bottom-up" approach. What are the advantages of "to-down" approach?

Q2:(problem R4--p.67) List six access technologies. Classifiy each one as residential aceess, company access, or mobile access.

Q3:(problem R23--p.69) What are the five layers in the Internet protocol stack? What are the pricipal responsibilites of each of these layers? List the protocols in each layer.

Q4:(problem R26--p.69) What is the difference between a virus, a worm, and a Trojan horse?

Q5: Read materials about history of Internet (http://www.isoc.org/internet/history/ )and list the top twenty(20) most important events(in your humble opinion).

Q6: Find some of interesting current/recent technological advances that are related to networking and describe them. At least five of them.

Q7: Define the following terms and also give an examples(or case studies). Briefly describe each in your own words.

      B2C, B2B, G2C, C2C, P2P

Q8:(problem D4--p.75) Skype offers a service that allows you to make a phone call from a PC to an ordinary phone. This means that the voice call must pass through both the Internet and through a telephone network. Discuss how this might be done.

Q9: Capture(using Wireshark) packets for “ping” program and print out a page full of packets and explain the packets by marking the packets. For example, you may mark packet #1 and say, “This is a UDP packet sent to X to do …..