CS 176A -- Introduction to Computer Communication Networks
Homework Assignment #1
Due in Class, Tuesday, October 15, 2002
- What is the purpose of a NAP?
- What is the purpose of a PoP?
- 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.
- What is the IESG's role in the IETF?
- Describe how an idea for a protocol is turned into an IETF RFC.
- List the different kinds of RFCs.
- 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?
- What is the basic function of the physical layer?
- A noiseless 4 kHz channel is sampled every 1 millisecond. What is
the maximum date rate?
- A noisy (20 dB signal-to-noise ration) 4 KHz channel carries a binary
signal. What is the maximum data rate?
- 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?
- 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.