assignments - Fall 2009 Assignment 2 Reading 1 Nader Mir...

Fall 2009
Assignment 2
Reading:
1. Nader Mir, Computer and Communication Networks , Chapters 5, 6, 13 and 14.
2. Professor Cantrell’s review of digital communications (corresponding to items 1 and 3 in the syllabus)
3. Professor Cantrell’s survey of Layer 2 technologies
Graded Exercises:
1. Nader Mir, Computer and Communication Networks , Chapter 3, Problem 1.
2. Nader Mir, Computer and Communication Networks , Chapter 3, Problem 2.
3. Nader Mir, Computer and Communication Networks , Chapter 4, Problem 1.
4. Nader Mir, Computer and Communication Networks , Chapter 4, Problem 2.
5. The bit string 100101011 emerges from the serializer unit of a modulator. Sketch the waveforms that emerge from
the line driver if the line coding is:
(a) Natural NRZ
(b) Polar NRZ
(c) Manchester
6. Find the information content per symbol, H ( X ) , where X is the set of letters A–Z of the North American Latin
alphabet. The table of English letter frequencies on the following page may be useful. (Note that the frequencies
are percents; thus, 12.75 percent of the symbols in a typical English message are the letter ”e”.)