Question 1

When the signals from two circuits combine to form a new signal that falls into a frequency band reserved for another signal,this is called,intermodulation noise.

Accepted Answer

A) True 
 B)False

Question 2

Crosstalk occurs when the signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.

Accepted Answer

A) True 
 B)False

Question 3

In an odd parity-checking scheme,the parity bit is set to make the total number of ones in the byte (including the parity bit)an even number.

Accepted Answer

A) True 
 B)False

Question 4

Most computer networks managed by a host mainframe computer use contention media access control.

Accepted Answer

A) True 
 B)False

Question 5

How does cyclical redundancy checking work?

Accepted Answer

Cyclic Redundancy Check (CRC) is an erro

Question 6

When a signal is reflected back to the transmitting equipment,it is called a(n)_________.

Accepted Answer

A)  white noise 
B)  echo 
C)  crosstalk 
D)  attenuation 
E)  impulse noise 
A)  white noise 
B)  echo 
C)  crosstalk 
D)  attenuation 
E)  impulse noise

Question 7

Point-to-point Protocol is a byte-count-oriented protocol.

Accepted Answer

A) True 
 B)False

Question 8

When we amplify the signal on an analog circuit,we also amplify any noise that is present on the circuit.

Accepted Answer

A) True 
 B)False

Question 9

When the output signal from an amplifier on a circuit is different from the input signal,this is called _________________.

Accepted Answer

A)  intermodulation nois 
B)  attenuation 
C)  echo 
D)  white noise 
E)  cross-talk 
A)  intermodulation nois 
B)  attenuation 
C)  echo 
D)  white noise 
E)  cross-talk

Question 10

Transmission efficiency refers to the percentage of bits transmitted without errors.

Accepted Answer

A) True 
 B)False

Question 11

A phase hit is likely to be:

Accepted Answer

A)  spikes 
B)  a short term shift out of phase 
C)  intermodulation noise 
D)  white noise 
E)  Gaussian noise 
A)  spikes 
B)  a short term shift out of phase 
C)  intermodulation noise 
D)  white noise 
E)  Gaussian noise

Question 12

____________ is not a function of a data link protocol.

Accepted Answer

A)  Media access control 
B)  Message delineation 
C)  Amplitude shift keying 
D)  Indicating when a message starts and stops 
E)  Error control 
A)  Media access control 
B)  Message delineation 
C)  Amplitude shift keying 
D)  Indicating when a message starts and stops 
E)  Error control

Question 13

Briefly define noise.Describe five types of noise and the underlying causes of this noise.Which type of noise is likely to pose the greatest problem to network managers? What does error look like in a data network?

Accepted Answer

Noise in the context of networking refer

Question 14

Polling is the process of permitting all clients to transmit or receive at any time.

Accepted Answer

A) True 
 B)False

Question 15

If a signal with a frequency of 500 MHz combines with a another signal of 1500 MHz and they form a new signal of 2000 MHz; this is an example of:

Accepted Answer

A)  intermodulation noise 
B)  attenuation 
C)  echo 
D)  white noise 
E)  cross-talk 
A)  intermodulation noise 
B)  attenuation 
C)  echo 
D)  white noise 
E)  cross-talk

Question 16

Attenuation refers to the loss of signal strength.

Accepted Answer

A) True 
 B)False

Question 17

Media access controls refer to the need to control when computers transmit.

Accepted Answer

A) True 
 B)False

Question 18

What is media access control and why is it important? What are two examples of controlled access methods and contention based media access methods? When might one access method be preferred over another in a network,and why? Under what conditions do contention-based media access control techniques outperform controlled-access techniques (i.e.,have lower response time)? Explain.

Accepted Answer

The answer of What is media access control and why...

Question 19

The distance between repeaters or amplifiers on a telephone circuit is determined by the amount of power gained per unit length of the transmission.

Accepted Answer

A) True 
 B)False

Question 20

Errors normally appear in ______________________________,which is when more than one data bit is changed by the error-causing condition.Is there any difference in the error rates of lower speed lines and of higher speed lines? What kinds of lines are more prone to errors?

Accepted Answer

Errors normally appear in data transmiss

When the signals from two circuits combine to form a new signal that falls into a frequency band reserved for another signal,this is called,intermodulation noise.

Crosstalk occurs when the signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.

In an odd parity-checking scheme,the parity bit is set to make the total number of ones in the byte (including the parity bit)an even number.

Most computer networks managed by a host mainframe computer use contention media access control.

How does cyclical redundancy checking work?

When a signal is reflected back to the transmitting equipment,it is called a(n)_________.

Point-to-point Protocol is a byte-count-oriented protocol.

When we amplify the signal on an analog circuit,we also amplify any noise that is present on the circuit.

When the output signal from an amplifier on a circuit is different from the input signal,this is called _________________.

Transmission efficiency refers to the percentage of bits transmitted without errors.

A phase hit is likely to be:

____________ is not a function of a data link protocol.

Briefly define noise.Describe five types of noise and the underlying causes of this noise.Which type of noise is likely to pose the greatest problem to network managers? What does error look like in a data network?

Polling is the process of permitting all clients to transmit or receive at any time.

If a signal with a frequency of 500 MHz combines with a another signal of 1500 MHz and they form a new signal of 2000 MHz; this is an example of:

Attenuation refers to the loss of signal strength.

Media access controls refer to the need to control when computers transmit.

The distance between repeaters or amplifiers on a telephone circuit is determined by the amount of power gained per unit length of the transmission.

Errors normally appear in ______________________________,which is when more than one data bit is changed by the error-causing condition.Is there any difference in the error rates of lower speed lines and of higher speed lines? What kinds of lines are more prone to errors?

Introduction to Data Communications

Application Layer

Physical Layer

Network and Transport Layers

Wired and Wireless LANs

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Design

Network Management

Filters

Exam 4: Data Link Layer

When the signals from two circuits combine to form a new signal that falls into a frequency band reserved for another signal,this is called,intermodulation noise.

Crosstalk occurs when the signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.

In an odd parity-checking scheme,the parity bit is set to make the total number of ones in the byte (including the parity bit)an even number.

Most computer networks managed by a host mainframe computer use contention media access control.

How does cyclical redundancy checking work?

When a signal is reflected back to the transmitting equipment,it is called a(n)_________.

Point-to-point Protocol is a byte-count-oriented protocol.

When we amplify the signal on an analog circuit,we also amplify any noise that is present on the circuit.

When the output signal from an amplifier on a circuit is different from the input signal,this is called _________________.

Transmission efficiency refers to the percentage of bits transmitted without errors.

A phase hit is likely to be:

____________ is not a function of a data link protocol.

Briefly define noise.Describe five types of noise and the underlying causes of this noise.Which type of noise is likely to pose the greatest problem to network managers? What does error look like in a data network?

Polling is the process of permitting all clients to transmit or receive at any time.

If a signal with a frequency of 500 MHz combines with a another signal of 1500 MHz and they form a new signal of 2000 MHz; this is an example of:

Attenuation refers to the loss of signal strength.

Media access controls refer to the need to control when computers transmit.

The distance between repeaters or amplifiers on a telephone circuit is determined by the amount of power gained per unit length of the transmission.

Errors normally appear in ______________________________,which is when more than one data bit is changed by the error-causing condition.Is there any difference in the error rates of lower speed lines and of higher speed lines? What kinds of lines are more prone to errors?

Introduction to Data Communications

Application Layer

Physical Layer

Network and Transport Layers

Wired and Wireless LANs

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Design

Network Management

Filters