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Midterm Exam #1 Review

Midterm Exam #1 Review. Exam time is Jun. 12 during class time. The first homework will be fully covered. Necessary formulas will be provided in the exam sheet (but without explanation of notations).

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Midterm Exam #1 Review

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  1. Midterm Exam #1 Review • Exam time is Jun. 12 during class time. • The first homework will be fully covered. • Necessary formulas will be provided in the exam sheet (but without explanation of notations). • You need to compute out the final numerical results in your answer. Do not simply write down the formula as your answer. • You can bring a calculator (no computer, iPhone, etc) • The numbers in exam are easy to compute without computing of log10() or log2() using calculator

  2. Question Types • Knowledge questions • True or false statement (explain why) • Calculations

  3. Knowledge Question Examples • What is the relationship between OSI 7 layer model and the TCP/IP 5 layer model? • What are the three types of transmission impairment? SNR relates to which one of them? dB/m unit relates to which one of them? • Can you say if a signal is periodic or nonperiodic by looking at the frequency domain plot? How? • What does SNR represent? Its formula? • What is the full name of MODEM? Does Cable Modem or DSL use baseband communication? Does Ethernet use baseband communication? • Why Cable and DSL provide higher downstream bandwidth than upstream bandwidth?

  4. Knowledge Question Examples • Why optical fiber introduces much less noise to data than Ethernet lines? Why optical fiber cannot bend arbitrarily while Ethernet line can? • What are the three mode of radio propagation? What mode of propagation is used by FM radio? Cellular tower? Long-wave AM radio? • In telephone network, does signaling use the same channel as data transmission? • What are the three types of topology in wired LAN? What topology does current Ethernet use?

  5. Calculation Problem Examples • All computation questions in Homework 1 • dB of SNR computing (Example 3.31) • bitRate requirement computing (Example 3.18) • Period and frequency computation (Example 3.5) • Attenuation computing (Example 3.26) • dBm and dB/km computation (Example 3.29/30) • SNRdB (Example 3.31) • Nyquist theorem usage (Example 3.36) • Shannon theorem usage (Example 3.39) • Throughput and delay (Example 3.47)

  6. Homework 1 Statistics • Count: 16 • Average: 69.8 • Median: 73.5 • Maximum: 91.0 • Minimum: 30.0

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