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31 A is a disturbance that propagates down a transmission medium to the other side, which reads it a. byto b. bit c. sinal d frame e. packet 3-2. When a signal travels, this is called. transit d. a propagation effect e. hop-by-hop transmission 3-3 Changes in a signal during propagation are called, most a distortion effects b. attenuation effects C- interference effects d. propagation effects e transmission effects 3-4. In binary, 13 is 1101. What is 14? c. Neither A nor B. 3-5 You have N bits. You can represent choices N2 b. c. Either A or B, depending on the circumstances. 3-6. You have three bits. How many possibilities can you represent .9, 37. You need to represent in binary whether a piece of music is classical, hip-hop, or ethnic. How many bits will you need? 3-8. You need to represent 35 courses being offered by a department. How many bits will you need? b. 3 d. 5 e. 6 39 What is the binary equivalent of 3? b. 10 e 10 d. 100 e. 3-10. How many bits does ASCII use to represent keyboard characters? . . 32. 3 To transmit "Next time." (without the quotation marks) in ASCII, how many bytes must you transmit? b. 8 C. 9 d. 10 3-12. Your computer screen has a resolution of 800 pixels horizontally and 600 pixels vertically. How many bytes will a JPEG screen image be? a. 60,000 b. 480,000. c. ,440,000. d.1520,000. 3-13. In 232 serial ports, +3 to +15 volts represents a c. d. Both A and B Neither A nor B 3-14. In 232 serial port transmission, a signal begins at 10 volts and attenuates by 75%. Will it still be received correctly? a. Yes b. No. 3-15. In 232 serial port transmission, a signal begins at 10 volts and attenuates by 60%. Will it still be read correctly by the receiver? a. Yes. b. No. 3-16. A signal is sent at 9 volts in a 232 serial port. What fraction of its strength can it lose before it becomes unreadable? a. 16 b. 3 c. 1/2 d 23 e. 5/6