1) What is the major factor that makes coaxial cable less susceptible to noise than twistedpair cable? (a) Inner conductor (b) Diameter of cable (c) Outer sheath (d) Insulating material 2) Aliasing can be defined as errors occurring when (a) The sample rate exceeds twice the input frequency. (b) The bandwidth is less than the input frequency. (c) The number of bits per sample is low. (d) The sampling signal has been incorrectly identified. 3) In _encoding, three levels are used: positive, zero, and negative. (a) Unipolar RZ (b) Bipolar RZ (c) Polar NRZ (d) Manchester NRZ 4) The rate defines the number of data elements sent in 1sec; the rate is the number of signal elements sent in 1sec. (a) data; signal (b) signal; data (c) bit; baud (d) baud; bit 5) The channel capacity of a noiseless channel can be improved by (a)Increasing the signal-to-noise ratio. (b) Decreasing the channel bandwidth. (c) Applying error correction technique. (d) Applying M-ary modulation scheme. 6) If the baud rate of a 64-QAM signal is 2000 symbol/sec, the bit rate is bps? (a) 300 (b) 400 (c) 1000 (d) 12000 7) Amount of information is represented by (a) I(Sk) (b) Pk (c) 1/ Pk (d) H 8)The main objective of the source coding techniques is to (a) Detect and correct errors. (b) Remove redundant bits. (c) Improve the channel capacity. (d) Reliable communication. 9)_ provides redundancy to ensure error detection. (a)Source coding (b) Line coding (c) Block coding (d) Digital modulation 10) In a multiplexed system, information sources share the bandwidth of link. (a) 1; n (b) 1; 1 (c) n; 1 (d) n; n

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Related questions

Question

1) What is the major factor that makes coaxial cable less susceptible to noise than twistedpair cable?

(a) Inner conductor (b) Diameter of cable (c) Outer sheath (d) Insulating material

2) Aliasing can be defined as errors occurring when

(a) The sample rate exceeds twice the input frequency.
(b) The bandwidth is less than the input frequency.
(c) The number of bits per sample is low.
(d) The sampling signal has been incorrectly identified.

3) In _______encoding, three levels are used: positive, zero, and negative.

(a) Unipolar RZ (b) Bipolar RZ (c) Polar NRZ (d) Manchester NRZ

4) The ________ rate defines the number of data elements sent in 1sec; the ______ rate is
the number of signal elements sent in 1sec.

(a) data; signal (b) signal; data (c) bit; baud (d) baud; bit
5) The channel capacity of a noiseless channel can be improved by

(a)Increasing the signal-to-noise ratio. (b) Decreasing the channel bandwidth.
(c) Applying error correction technique. (d) Applying M-ary modulation scheme.

6) If the baud rate of a 64-QAM signal is 2000 symbol/sec, the bit rate is ________ bps?
(a) 300 (b) 400 (c) 1000 (d) 12000

7) Amount of information is represented by ______
(a) I(Sk) (b) Pk (c) 1/ Pk (d) H

8)The main objective of the source coding techniques is to
(a) Detect and correct errors. (b) Remove redundant bits.
(c) Improve the channel capacity. (d) Reliable communication.

9)_______ provides redundancy to ensure error detection.
(a)Source coding (b) Line coding (c) Block coding (d) Digital modulation

10) In a multiplexed system, ____ information sources share the bandwidth of ____ link.

(a) 1; n (b) 1; 1 (c) n; 1 (d) n; n

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