Module Assignments

For this module you are required to complete the following assignments:

• Chapter 10: exercises # 1 - 5

1. Does the U.S. government support the Internet? Explain.

2. Given an IP packet of size 540 bytes and a maximum packet size of 200 bytes, what are the IP Fragment Offsets and More flags for the appropriate packet fragments?

3. The Hop Limit field in IP version 6 is 8 bits long (the same size as the equivalent Time to Live field in IPv4). Since this hop count is decremented each time an IP datagram enters a router, what are the implications of such a small field size?

4. Suppose there is a small commercial retail building with essentially one room. On one side of the room is a real estate agency and on the other side of the room is a guy who sells tea. What is the relationship between this setup and the concept of IP addresses with TCP port numbers?

5. Somewhere in the middle of the United States are two Internet routers with routing tables that are all messed up. The two routers keep sending their packets back and forth to each other, nonstop. Will an error message ever be generated from this action? If so, who will generate the error message and what might it look like?

Thinking Outside the Box

Two banks want to establish an electronic link between themselves, over which they can transmit money transfer. Can they use a virtual private network and a tunneling protocol, or is a better technique available? Defend your answer.

• Chapter 11: exercises # 1 - 6

1. The telephone line that connects your house or business to the central office (the local loop) carries your conversation and the conversation of the person to whom you are talking. What do you estimate is the bandwidth of a local loop?

2. If you play a CD for a friend over the telephone, will the friend hear high-quality music? If not, why not?

3. If you place a telephone call and it leaves your LATA and enters another LATA, what kind of telephone call have you placed? What kind of telephone company handles this telephone call?

4. For each of the following scenarios, state whether a telephone line or a trunk should be used:

a. The connection from your home to the local telephone company

b. The connection between a large company's PBX and the telephone company

c. The connection between two central offices

5. Many within the telephone industry feel we will eventually run out of area codes and telephone numbers. How many different area codes are currently available? What would you suggest to increase the number of telephone numbers?

6. State whether each of the following was a result of the Modified Final Judgment of 1984, the Telecommunications Act of 1996, or neither:

a. The FCC was created to watch over interstate telephone systems

b. AT&T had to sell off its local telephone companies

c. The LATA was created

d. Cable television companies could provide local telephone service

e. Customers could choose between different long-distance telephone providers

f. AT&T split off its technology division, which became Lucent

Thinking Outside the Box

You are consulting for a hospital that wants to send three-dimensional, high-resolution, color ultrasound images between the main hospital and an outpatient clinic.

A patient will be receiving the ultrasound at the clinic, while a doctor at the main hospital observes the images in real time and talks to the ultrasound technician and patient via a telephone connection.

What type of telecommunication service presented in this chapter might support this application? Indentify the telecommunications service, and be sure to list the particular details concerning the service. Explain your reasoning.