MIS430 Final Testbank PDF

Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors 1. The physical layer has no awareness of the meaning of the data bits being transmitted. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 108 QUESTION T...

Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors 1. The physical layer has no awareness of the meaning of the data bits being transmitted. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 108 QUESTION TYPE: True / False 2. The function of a data frame is to wrap the message, just like an envelope wraps a letter in regular mail. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 108 QUESTION TYPE: True / False 3. Creating a data frame does not increase the number of bits to be transmitted. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 109 QUESTION TYPE: True / False 4. The sender and receiver of a data link frame do not need to be using the same protocol. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 109 QUESTION TYPE: True / False 5. The part of a frame that holds the actual data that needs to be transmitted is called a payload. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 109 QUESTION TYPE: True / False 6. The transport layer header contains as receiver address a port number. a. True b. False ANSWER: True POINTS: 1 Copyright Cengage Learning. Powered by Cognero. Page 1 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors REFERENCES: page 109 QUESTION TYPE: True / False 7. The fields of each header do not vary depending on the protocol that creates the header. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 109 QUESTION TYPE: True / False 8. The MAC address usually appears in the transport layer header. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 110 QUESTION TYPE: True / False 9. The trailer part of a data link frame never holds error detection information. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 110 QUESTION TYPE: True / False 10. Long messages can be broken into smaller ones that are sent in distinct packets that each have its own route across a network. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 110 QUESTION TYPE: True / False 11. Because white noise is relatively continuous, it can be reduced significantly but never completely eliminated. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 111 QUESTION TYPE: True / False 12. White noise is dependent on the temperature of the medium. Copyright Cengage Learning. Powered by Cognero. Page 2 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 112 QUESTION TYPE: True / False 13. If the impulse spike interferes with an analog signal, removing it without affecting the original signal is extremely easy. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 113 QUESTION TYPE: True / False 14. If impulse noise interferes with a digital signal, often the original digital signal cannot be recognized and recovered. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 113 QUESTION TYPE: True / False 15. Noise is a problem for both analog and digital signals. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 111 QUESTION TYPE: True / False 16. Telephone signal crosstalk was a more common problem before telephone companies used fiber-optic cables and other well-shielded wires. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 113 QUESTION TYPE: True / False 17. Echo error rarely occurs at junctions where wires are connected. a. True b. False ANSWER: False Copyright Cengage Learning. Powered by Cognero. Page 3 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors POINTS: 1 REFERENCES: page 113 QUESTION TYPE: True / False 18. If jitter becomes too great, correcting it can require the transmitting devices to speed up their transmission rates. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 114 QUESTION TYPE: True / False 19. Attenuation can be eliminated with the use of repeaters for analog systems. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 114 QUESTION TYPE: True / False 20. An unfortunate side effect of noise during a transmission is that the transmitting station has to slow down its transmission rate. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 114 QUESTION TYPE: True / False 21. Installing special filters for analog signals and digital signal regeneration for digital signals helps in preventing white noise. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 112 QUESTION TYPE: True / False 22. TCP performs error detection at the endpoints of the connection. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 118 QUESTION TYPE: True / False Copyright Cengage Learning. Powered by Cognero. Page 4 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors 23. Simple parity can detect only an even number of erroneous bits per character. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 117 QUESTION TYPE: True / False 24. The CRC error-detection method treats the packet of data to be transmitted as a large polynomial. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 120 QUESTION TYPE: True / False 25. The CRC method catches almost 100% of errors. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 120 QUESTION TYPE: True / False 26. Returning a message was one of the first error-control techniques developed. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 122 QUESTION TYPE: True / False 27. NAK represents a positive acknowledgment. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 123 QUESTION TYPE: True / False 28. Sliding window protocols have been around since the 1970s. a. True b. False ANSWER: True POINTS: 1 Copyright Cengage Learning. Powered by Cognero. Page 5 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors REFERENCES: page 123 QUESTION TYPE: True / False 29. When a parity bit is assigned to ASCII, the Hamming distance becomes 4. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 127 QUESTION TYPE: True / False 30. In a stop-and-wait error control system, a receiver may acknowledge multiple packets with a single ACK. a. True b. False ANSWER: False POINTS: 1 REFERENCES: page 122 QUESTION TYPE: True / False 31. In a sliding-window error control system, a receiver may acknowledge multiple packets with a single ACK. a. True b. False ANSWER: True POINTS: 1 REFERENCES: page 124 QUESTION TYPE: True / False 32. A tool called ____ can capture packets as they traverse a network. a. wire unpacker b. wire sniffer c. packet sniffer d. unpacker ANSWER: c POINTS: 1 REFERENCES: page 109 QUESTION TYPE: Multiple Choice 33. The data contained within a data link package is called ____. a. payload b. trailer c. header d. bits ANSWER: a POINTS: 1 REFERENCES: page 109 Copyright Cengage Learning. Powered by Cognero. Page 6 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors QUESTION TYPE: Multiple Choice 34. The ____ layer has no awareness of the meaning of the data bits being transmitted. a. data link b. physical c. transport d. network ANSWER: b POINTS: 1 REFERENCES: page 108 QUESTION TYPE: Multiple Choice 35. In the Ethernet header, the destination address is a ____. a. port number b. IP address v4 c. IP address v6 d. MAC address ANSWER: d POINTS: 1 REFERENCES: page 110 QUESTION TYPE: Multiple Choice 36. In the Transport header, the destination address is a ____. a. port number b. IP address v4 c. IP address v6 d. MAC address ANSWER: a POINTS: 1 REFERENCES: page 109 QUESTION TYPE: Multiple Choice 37. White noise is also called thermal noise or ____ noise. a. crosstalk b. jitter c. Gaussian d. spike ANSWER: c POINTS: 1 REFERENCES: page 111 QUESTION TYPE: Multiple Choice 38. Impulse noise is also known as ____. a. noise spike b. jitter Copyright Cengage Learning. Powered by Cognero. Page 7 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors c. attenuation d. crosstalk ANSWER: a POINTS: 1 REFERENCES: page 112 QUESTION TYPE: Multiple Choice 39. Typically, impulse noise is a(n) ____ burst of energy. a. digital b. analog c. binary d. logical ANSWER: b POINTS: 1 REFERENCES: page 112 QUESTION TYPE: Multiple Choice 40. High humidity and wet weather can cause an increase in electrical ____ over a telephone system. a. compression b. attenuation c. jitter d. crosstalk ANSWER: d POINTS: 1 REFERENCES: page 113 QUESTION TYPE: Multiple Choice 41. To minimize the effect of echo, a device called a(n) ____ can be attached to a line. a. echo suppressor b. repeater c. amplifier d. hub ANSWER: a POINTS: 1 REFERENCES: page 113 QUESTION TYPE: Multiple Choice 42. ____ is the result of small timing irregularities that become magnified during the transmission of digital signals as the signals are passed from one device to another. a. White noise b. Jitter c. Attenuation d. Echo ANSWER: b POINTS: 1 Copyright Cengage Learning. Powered by Cognero. Page 8 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors REFERENCES: page 114 QUESTION TYPE: Multiple Choice 43. Causes of jitter can include electromagnetic interference, ____, passing the signal through too many repeaters, and the use of lower-quality equipment. a. coding b. sampling c. compression d. crosstalk ANSWER: d POINTS: 1 REFERENCES: page 114 QUESTION TYPE: Multiple Choice 44. ____ is not necessarily a form of error, but can indirectly lead to an increase in errors affecting the transmitted signal. a. Impulse noise b. Crosstalk c. Attenuation d. White noise ANSWER: c POINTS: 1 REFERENCES: page 114 QUESTION TYPE: Multiple Choice 45. ____ means that if the transmitting modem sends data and the data arrives garbled, the receiving modem may ask the transmitting modem to fall back to a slower transmission speed. a. Impulse negotiation b. Fallback negotiation c. Attenuation d. Downlink ANSWER: b POINTS: 1 REFERENCES: page 114 QUESTION TYPE: Multiple Choice 46. ____ noise that happens with twisted pair wires, such as an Ethernet cable, can be electrical. a. Crosstalk b. Gaussian c. Echo d. Jitter ANSWER: a POINTS: 1 REFERENCES: page 113 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero. Page 9 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors 47. Installing proper shielding on cables prevents ____. a. white noise b. impulse noise c. attenuation d. crosstalk ANSWER: d POINTS: 1 REFERENCES: page 113 QUESTION TYPE: Multiple Choice 48. Error detection can be performed in several places within a communications model. One of the most common places is the TCP/IP ____ layer. a. network b. application c. network access/data link d. physical ANSWER: c POINTS: 1 REFERENCES: page 116 QUESTION TYPE: Multiple Choice 49. The most basic error-detection techniques are parity checks, which are also used for ____ systems. a. wireless b. data storage c. wired d. fiber-optic ANSWER: b POINTS: 1 REFERENCES: page 116 QUESTION TYPE: Multiple Choice 50. With ____ parity, the 0 or 1 added to the string produces an even number of binary 1s. a. even b. odd c. longitudinal d. binary ANSWER: a POINTS: 1 REFERENCES: page 117 QUESTION TYPE: Multiple Choice 51. Isolated single-bit errors occur ____ percent of the time. a. 30 to 40 b. 40 to 50 c. 50 to 60 Copyright Cengage Learning. Powered by Cognero. Page 10 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors d. 60 to 70 ANSWER: c POINTS: 1 REFERENCES: page 117 QUESTION TYPE: Multiple Choice 52. Error bursts occur ____ percent of the time. a. 2 to 5 b. 5 to 10 c. 8 to 10 d. 10 to 20 ANSWER: d POINTS: 1 REFERENCES: page 120 QUESTION TYPE: Multiple Choice 53. Longitudinal parity is sometimes called longitudinal redundancy check or ____ parity. a. vertical b. horizontal c. random d. binary ANSWER: b POINTS: 1 REFERENCES: page 117 QUESTION TYPE: Multiple Choice 54. An arithmetic checksum _______ the individual characters to be transmitted. a. adds b. multiplies c. inverts d. divides ANSWER: a POINTS: 1 REFERENCES: page 118 QUESTION TYPE: Multiple Choice 55. A ____ is an industry-approved bit string used to create the CRC remainder. a. arithmetic checksum b. numeric modem c. generator polynomial d. packet sniffer ANSWER: c POINTS: 1 REFERENCES: page 120 Copyright Cengage Learning. Powered by Cognero. Page 11 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors QUESTION TYPE: Multiple Choice 56. Many wide area network protocols use ____ for error-detection. a. arithmetic checksum b. CRC c. longitudinal parity d. simple parity ANSWER: b POINTS: 1 REFERENCES: page 121 QUESTION TYPE: Multiple Choice 57. ____ cable is the medium least prone to generating errors. a. Fiber-optic b. Coaxial c. Twisted pair d. Copper-based ANSWER: a POINTS: 1 REFERENCES: page 111 QUESTION TYPE: Multiple Choice 58. ____ is probably the most common form of error control. a. Toss the frame (do nothing) b. Correct the error without retransmission c. Sending a message back to the transmitter d. Correct the error with retransmission ANSWER: c POINTS: 1 REFERENCES: page 122 QUESTION TYPE: Multiple Choice 59. ____ error control is a technique usually associated with the Stop-and-wait flow control protocol. a. Stop-and-wait b. Timeout c. Sliding window d. ACK ANSWER: a POINTS: 1 REFERENCES: page 122 QUESTION TYPE: Multiple Choice 60. When working with stop-and-wait error control, the amount of time a station waits before retransmitting a packet is called ____. a. stop time Copyright Cengage Learning. Powered by Cognero. Page 12 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors b. ACK time c. NAK time d. timeout ANSWER: d POINTS: 1 REFERENCES: page 123 QUESTION TYPE: Multiple Choice 61. ____ is a flow-control scheme that allows a station to transmit a number of data packets at one time before receiving some form of acknowledgment. a. Stop-and-wait b. Sliding window c. Timeout d. ACK window ANSWER: b POINTS: 1 REFERENCES: page 124 QUESTION TYPE: Multiple Choice 62. With the sliding window protocol, a station that had a maximum window size of 7 could transmit only ____ data packets at one time before it had to stop and wait for an acknowledgment. a. 5 b. 6 c. 7 d. 8 ANSWER: c POINTS: 1 REFERENCES: page 124 QUESTION TYPE: Multiple Choice 63. A ____ protocol’s function is simply to inform the transmitter what piece of data is expected next. a. CRC-16 b. CRC-32 c. stop-and-wait d. sliding window ANSWER: d POINTS: 1 REFERENCES: page 124 QUESTION TYPE: Multiple Choice 64. For a receiver to be able to fix an error—in a process called ____—redundant information must be present so that the receiver knows which bit or bits are in error and what their original values were. a. forward error correction b. forward error detection c. backward error correction Copyright Cengage Learning. Powered by Cognero. Page 13 Downloaded by: t7dane502 | [email protected] Want to earn $1.236 Distribution of this document is illegal extra per year?  Stuvia.com - The Marketplace to Buy and Sell your Study Material Chapter 04: Frames and Errors d. backward error detection ANSWER: a POINTS: 1 REFERENCES: page 127 QUESTION TYPE: Multiple Choice 65. If a receiver correctly receives packets 2, 3, and 4, it will respond with a(an) ____. a. ACK 3 b. ACK 4 c. ACK 5 d. NAK ANSWER: c POINTS: 1 REFERENCES: page 124 QUESTION TYPE: Multiple Choice 66. If a receiver has just received one packet of data with bytes numbered 600 to 700, it will respond immediately with ____. a. an ACK of 700 b. an ACK of 701 c. an ACK of 800 d. it will not respond just yet ANSWER: b POINTS: 1 REFERENCES: page 124 QUESTION TYPE: Multiple Choice 67. Bits at the beginning and end of the data signal serve as a package for the data as it traverses a network connection. This package is called a(n)____________________. ANSWER: frame POINTS: 1 REFERENCES: page 108 QUESTION TYPE: Completion 68. The header of the ____________________ layer has port addresses for both the sender and receiver devices. ANSWER: transport POINTS: 1 REFERENCES: page 109 QUESTION TYPE: Completion 69. The header of the ____________________ layer follows the Internet Protocol. ANSWER: network POINTS: 1 REFERENCES: page 110 QUESTION TYPE: Completion Copyright Cengage Learning. Powered by Cognero. 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