Question 1

Synchronous serial transmissions are frame based,require the use of a preamble and are more efficient than asynchronous serial transmissions.

Accepted Answer

A) True 
 B)False

Question 2

With ________ transmission,a block of bits is transmitted in a steady stream without start and stop codes.

Accepted Answer

The answer of With ________ transmission,a block of bits is...

Question 3

Converting digital data to analog signals involves the use of a _________.

Accepted Answer

The answer of Converting digital data to analog signals involves...

Question 4

Both analog and digital information can be encoded as either analog or digital signals.

Accepted Answer

A) True 
 B)False

Question 5

For amplitude,frequency or phase shift keying,that respective characteristic of the carrier wave is change to indicate the next binary digit; these binary digits can be represented by this signal change or a lack of signal change.

Accepted Answer

A) True 
 B)False

Question 6

The mapping from binary digits to signal elements is the ________ scheme.

Accepted Answer

The answer of The mapping from binary digits to signal...

Question 7

Error detection requires that extra bits be introduced into the data stream.

Accepted Answer

A) True 
 B)False

Question 8

Analog signals are less susceptible to noise interference and are more prone to attenuation than digital signals.

Accepted Answer

A) True 
 B)False

Question 9

In modern communication systems,data is sent from one point to another via:

Accepted Answer

A) input data 
B) alternating current (A / 
C)  
C) pressure changes 
D) electromagnetic signals 
A) input data 
B) alternating current (A / 
C)  
C) pressure changes 
D) electromagnetic signals

Question 10

One of the least common error-detecting codes is the cyclic redundancy check.

Accepted Answer

A) True 
 B)False

Question 11

__________ is the communication of data across a computer network by the propagation and processing of signals.

Accepted Answer

The answer of __________ is the communication of data across...

Question 12

A _______ modem permits Internet access over cable television networks.

Accepted Answer

The answer of A _______ modem permits Internet access over...

Question 13

For sizable blocks of data,asynchronous transmission is far more efficient than synchronous.

Accepted Answer

A) True 
 B)False

Question 14

In Non Return to Zero encoding schemes,the signal or voltage level does not return to 0v (zero volts); one of the problems with this type of encoding is that:

Accepted Answer

A) it is sometimes difficult to synchronize the timing of the transmitter and the receiver 
B) it does not work well with serial communications 
C) the signal ground of the transmitter is often different from that of the receiver 
D) it works only for analog signals 
A) it is sometimes difficult to synchronize the timing of the transmitter and the receiver 
B) it does not work well with serial communications 
C) the signal ground of the transmitter is often different from that of the receiver 
D) it works only for analog signals

Question 15

The process of error control involves two elements: error detection and _________.

Accepted Answer

The answer of The process of error control involves two...

Question 16

When no character is being transmitted,the line between transmitter and receiver is in an idle state.

Accepted Answer

A) True 
 B)False

Question 17

Analog signals are:

Accepted Answer

A) continuous 
B) discrete 
C) discontinuous 
D) all of the above 
A) continuous 
B) discrete 
C) discontinuous 
D) all of the above

Question 18

Standards are important when devices must communicate together; the four characteristics governed by these standards are:

Accepted Answer

A) mechanical,electrical,functional,and procedural 
B) electrical,physical,functional,and signaling 
C) fundamental,mechanical,procedural,and protocol 
D) protocol,fundamental,physical,and signaling 
A) mechanical,electrical,functional,and procedural 
B) electrical,physical,functional,and signaling 
C) fundamental,mechanical,procedural,and protocol 
D) protocol,fundamental,physical,and signaling

Question 19

The efficiency of an asynchronous transmission using 1 stop bit,1 start bit,and 1 parity bit is:

Accepted Answer

A) 20% 
B) 30% 
C) 50% 
D) 70% 
A) 20% 
B) 30% 
C) 50% 
D) 70%

Question 20

If a carrier wave is modulated with 4 amplitudes and 4 phase changes,how many possible signal combinations are there?

Accepted Answer

A) 4 
B) 8 
C) 16 
D) 32 
A) 4 
B) 8 
C) 16 
D) 32

Synchronous serial transmissions are frame based,require the use of a preamble and are more efficient than asynchronous serial transmissions.

With ________ transmission,a block of bits is transmitted in a steady stream without start and stop codes.

Converting digital data to analog signals involves the use of a _________.

Both analog and digital information can be encoded as either analog or digital signals.

For amplitude,frequency or phase shift keying,that respective characteristic of the carrier wave is change to indicate the next binary digit; these binary digits can be represented by this signal change or a lack of signal change.

The mapping from binary digits to signal elements is the ________ scheme.

Error detection requires that extra bits be introduced into the data stream.

Analog signals are less susceptible to noise interference and are more prone to attenuation than digital signals.

In modern communication systems,data is sent from one point to another via:

One of the least common error-detecting codes is the cyclic redundancy check.

__________ is the communication of data across a computer network by the propagation and processing of signals.

A _______ modem permits Internet access over cable television networks.

For sizable blocks of data,asynchronous transmission is far more efficient than synchronous.

In Non Return to Zero encoding schemes,the signal or voltage level does not return to 0v (zero volts); one of the problems with this type of encoding is that:

The process of error control involves two elements: error detection and _________.

When no character is being transmitted,the line between transmitter and receiver is in an idle state.

Analog signals are:

Standards are important when devices must communicate together; the four characteristics governed by these standards are:

The efficiency of an asynchronous transmission using 1 stop bit,1 start bit,and 1 parity bit is:

If a carrier wave is modulated with 4 amplitudes and 4 phase changes,how many possible signal combinations are there?

Introduction

Business Information

Distributed Data Processing

Data Transmission

Data Link Control and Multiplexing

The Internet

Tcp / Ip

Client Server, intranet, and Cloud Computing

Internet-Based Applications

Internet Operation

Lan Architecture and Infrastructure

Ethernet, switches, and Virtual Lans

Wireless Lans

Wan Technology and Protocol

Wan Services

Wireless Lans

Computer and Network Security Threats

Computer and Network Security Techniques

Filters

Exam 5: Data Communication Fundamentals

Synchronous serial transmissions are frame based,require the use of a preamble and are more efficient than asynchronous serial transmissions.

With ________ transmission,a block of bits is transmitted in a steady stream without start and stop codes.

Converting digital data to analog signals involves the use of a _________.

Both analog and digital information can be encoded as either analog or digital signals.

For amplitude,frequency or phase shift keying,that respective characteristic of the carrier wave is change to indicate the next binary digit; these binary digits can be represented by this signal change or a lack of signal change.

The mapping from binary digits to signal elements is the ________ scheme.

Error detection requires that extra bits be introduced into the data stream.

Analog signals are less susceptible to noise interference and are more prone to attenuation than digital signals.

In modern communication systems,data is sent from one point to another via:

One of the least common error-detecting codes is the cyclic redundancy check.

__________ is the communication of data across a computer network by the propagation and processing of signals.

A _______ modem permits Internet access over cable television networks.

For sizable blocks of data,asynchronous transmission is far more efficient than synchronous.

In Non Return to Zero encoding schemes,the signal or voltage level does not return to 0v (zero volts); one of the problems with this type of encoding is that:

The process of error control involves two elements: error detection and _________.

When no character is being transmitted,the line between transmitter and receiver is in an idle state.

Analog signals are:

Standards are important when devices must communicate together; the four characteristics governed by these standards are:

The efficiency of an asynchronous transmission using 1 stop bit,1 start bit,and 1 parity bit is:

If a carrier wave is modulated with 4 amplitudes and 4 phase changes,how many possible signal combinations are there?

Introduction

Business Information

Distributed Data Processing

Data Transmission

Data Link Control and Multiplexing

The Internet

Tcp / Ip

Client Server, intranet, and Cloud Computing

Internet-Based Applications

Internet Operation

Lan Architecture and Infrastructure

Ethernet, switches, and Virtual Lans

Wireless Lans

Wan Technology and Protocol

Wan Services

Wireless Lans

Computer and Network Security Threats

Computer and Network Security Techniques

Filters