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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 Question Types – Knowledge questions – True or false statement (explain why) – Calculations 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? 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? 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) Homework 1 Statistics • • • • • Count: 16 Average: 69.8 Median: 73.5 Maximum: 91.0 Minimum: 30.0 MidTerm 1 Statistics