CPET2314, Ques., Chp 3 1
Name__________________________ Date___________
CPET2314, Data Communication Systems
Chapter 3 Questions from pages 85, 86 and 87 in the textbook, plus CRC
and Hamming Code questions. Add your answers below the questions,
handwritten only. Show your work in problems where calculations are
required for answers.
2. How many errors can parity reliably detect in a single character?
5. What is one drawback when using parity for error detection?
6. Define overhead in terms of serial data messages.
9. What is the prime limitation of the LRC error-correction method?
10. What is meant by forward error correction?
13. How does the LRC pinpoint the bad bit in a character?
27. List the two main test functions of bit-error and error-free second specifications.
Section 3.4, Review Questions, page 85
1. What is the bit-error rate for a system that experiences 3 bit errors in a transmission
of 512 K bytes of data?
2. What is the error-free second percentage of a system that experiences three seconds
with errors in a total transmission time of two hours?
