Exam 3: Physical Layer

Define analog,and then describe the conversion from analog to digital using a four step method (sampling,measuring,quantizing and coding),and present a detailed diagram like the one which in the slides.What is quantizing error and how can it be lessened in some situations?Draw a sketch of quantizing error in your model.

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Question 61

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Of all the media available,fiber optic provides the highest transmission speeds.

(True/False)

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Question 62

Computers produce digital data whose values are binary:0 or 1.

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Question 63

Which of the following would be considered a type of wireless media?

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Question 64

The type of media usually installed on homes and businesses by the telephone company is called ____________.

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Question 65

Describe how data could be transmitted using frequency modulation.Draw this.

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Question 66

____________ is a modulation technique that combines two different amplitude combinations with eight different phase combinations modulation to send four bits per symbol.

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Question 67

To get more "bandwidth" in a digital transmission,you must:

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Question 68

Statistical time division multiplexing does not require the capacity of the circuit to be equal to the sum of the combined circuits.

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Question 69

What is the function of inverse multiplexing?What is an inverse multiplexer? Why would you put one on a network?

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Question 70

Frequency is the number of cycles per second and is expressed in Hertz.

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Question 71

Which is not true about point-to-point circuits?

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Question 72

Having a conversation with someone using a cellular phone is an example of _________ transmission.

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Question 73

Which type of digital signaling would experience fewer errors because it has more distinct signals?

(Multiple Choice)

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Question 74

How many bits are required to sample an incoming signal 4000 times per second using 64 different amplitude levels?

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Question 75

_____________ is not a form of modulation used to transform digital data into analog signals.

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Question 76

If the highest frequency of a circuit is 10KHZ and the lowest frequency is 900 Hz,the bandwidth available for this circuit is :

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Question 77

Data compression can increase the throughput of a communication link.

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Question 78

Data is physically transmitted from one computer or terminal to another in the ________ layer.

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Question 79

Inverse multiplexing means:

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Question 80

Showing 61 - 80 of 142

Of all the media available,fiber optic provides the highest transmission speeds.

Computers produce digital data whose values are binary:0 or 1.

Which of the following would be considered a type of wireless media?

The type of media usually installed on homes and businesses by the telephone company is called ____________.

Describe how data could be transmitted using frequency modulation.Draw this.

____________ is a modulation technique that combines two different amplitude combinations with eight different phase combinations modulation to send four bits per symbol.

To get more "bandwidth" in a digital transmission,you must:

Statistical time division multiplexing does not require the capacity of the circuit to be equal to the sum of the combined circuits.

What is the function of inverse multiplexing?What is an inverse multiplexer? Why would you put one on a network?

Frequency is the number of cycles per second and is expressed in Hertz.

Which is not true about point-to-point circuits?

Having a conversation with someone using a cellular phone is an example of _________ transmission.

Which type of digital signaling would experience fewer errors because it has more distinct signals?

How many bits are required to sample an incoming signal 4000 times per second using 64 different amplitude levels?

_____________ is not a form of modulation used to transform digital data into analog signals.

If the highest frequency of a circuit is 10KHZ and the lowest frequency is 900 Hz,the bandwidth available for this circuit is :

Data compression can increase the throughput of a communication link.

Data is physically transmitted from one computer or terminal to another in the ________ layer.

Inverse multiplexing means:

Introduction to Data Communications

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Data Link Layer

Network and Transport Layers

Wired and Wireless LANs

Backbone Networks

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The Internet

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