Review Questions

Answers to the review questions can be found in Appendix A, "Answers to Review Questions."

1:	What does Shannon's Law state?
2:	What does the Nyquist sampling theorem state?
3:	What does DMT stand for? How many subchannels does the standard (ANSI) ADSL define?
4:	Why is CAP modulation sometimes called suppressed QAM?
5:	What is the typical speed in the 802.11b standard? What coding techniques provide these speeds?
6:	How wide is the high carrier in 802.11a; how many subchannels does it have, and how wide is each subchannel?
7:	How does the 802.11g standard relate to 802.11a and 802.11b?
8:	What is the relation between the terms clocking, timing, and synchronization?
9:	What interface uses the pseudo-ternary coding technique? What is the size of the frame?
10:	What does 2B1Q stand for and which interface does it use? What is the size of the frame?
11:	What is perfect scheduling in the physical layer?
12:	How do T1 circuits meet the ones density requirements?
13:	Explain how the 24 framing bits in ESF are broken down and how they are used.