CS 176A -- Introduction to Computer Communication Networks
Homework Assignment #1
Due in Class, Tuesday, October 15, 2002

  1. What is the purpose of a NAP?

  2. What is the purpose of a PoP?

  3. Surf the Internet and print out a map of a backbone network. The backbone can either be a commercial ISP or a non-US high-speed research network.

  4. What is the IESG's role in the IETF?

  5. Describe how an idea for a protocol is turned into an IETF RFC.

  6. List the different kinds of RFCs.

  7. Why is it the case that there is ``fuzziness'' in the OSI stack, i.e. why is it the case that there is sometimes a function that should be in one layer but is actually provided by a protocol classified as being in another layer?

  8. What is the basic function of the physical layer?

  9. A noiseless 4 kHz channel is sampled every 1 millisecond. What is the maximum date rate?

  10. A noisy (20 dB signal-to-noise ration) 4 KHz channel carries a binary signal. What is the maximum data rate?

  11. How is a baud different than a bit-per-second? What is the maximum baud rate of a POTS (plain old telephone service)? What is the maximum bps rate of a POTS?

  12. What is the data rate of an OC-1? Describe how this number is determined, i.e. list the sampling interval, bits-per-sample, size of the frame, data bits per frame, non-data bits per frame, etc.