CHAP07 - CHAPTER 7 Flow and Error Control Multiple-Choice...

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1 CHAPTER 7 Flow and Error Control Multiple-Choice Questions 1. d 3. b 5. d 7. a 9. d 11. c 13. d 15. b 17. a 19. d 21. b 23. d 25. b Exercises 27. See Figure 7.1 29. a. The number refers to the receipt of an acceptable frame. b. The number refers to the next expected frame. c. The number refers to the next expected frame. 31. Four bits. 33. 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2 35. See Figure 7.2. 37. See Figure 7.3. 39. See Figure 7.4.
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2 CHAPTER 7 FLOW AND ERROR CONTROL 41. 26 ms 43. 26 ms 45. See Figure 7.5. Figure 7.1 Exercise 27 Figure 7.2 Exercise 35 0 1 2 3 4 5 6 7 0 1 2 3 456 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 0 1 2 3 Data 0 Data 1, 2 ACK 0 ACK 2 Data 3, 4, 5 Data 4, 6,7 ACK 7 NAK 4 Sender Data 0 Data 1 ACK 1 ACK 0 Data 0 Data 0 ACK 1 NAK Sender 0 1 000 111 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
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SECTION 3 Figure 7.3 Exercise 37 Figure 7.4 Exercise 39 Figure 7.5 Exercise 45 Data 0 Data 0 ACK 1 ACK 1 Sender Lost 0 1 000 111 0 1 0 1 0 1 0 1 After timeout 0 1 2 3 4 5 6 7 0 1 2 3 456 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 4 5
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CHAP07 - CHAPTER 7 Flow and Error Control Multiple-Choice...

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