Question 1

Overhead bits are used for error checking and marking the start and end of characters and packets.

Accepted Answer

A) True 
 B)False

Question 2

__________can obliterate a group of bits,causing a burst error.

Accepted Answer

A)  Cross-talk 
B)  Attenuation 
C)  Impulse noise 
D)  Intermodulation noise 
E)  White noise 
A)  Cross-talk 
B)  Attenuation 
C)  Impulse noise 
D)  Intermodulation noise 
E)  White noise

Question 3

As part of the five-layer network model used in this textbook,the data link layer sits directly between:

Accepted Answer

A)  the physical and the application layers 
B)  the network and the application layers 
C)  the network and transport layers 
D)  the physical and the application layers. 
E)  the physical and the network layers 
A)  the physical and the application layers 
B)  the network and the application layers 
C)  the network and transport layers 
D)  the physical and the application layers. 
E)  the physical and the network layers

Question 4

In a network,the type of errors caused during data transmission can be controlled by the network hardware and software.

Accepted Answer

A) True 
 B)False

Question 5

HDLC is very similar to the SDLC synchronous data link protocol.

Accepted Answer

A) True 
 B)False

Question 6

Errors on a network can occur:

Accepted Answer

A)  only on dial-up type of circuits 
B)  because of noise on the line 
C)  only on poorly maintained networks 
D)  only due to Gaussian noise 
E)  only due to lightning strikes 
A)  only on dial-up type of circuits 
B)  because of noise on the line 
C)  only on poorly maintained networks 
D)  only due to Gaussian noise 
E)  only due to lightning strikes

Question 7

In general,controlled approaches:

Accepted Answer

A)  work better than contention approaches for small networks that have low usage 
B)  work better than contention approaches for large networks that have high usage 
C)  work better than contention approaches for all sizes of networks 
D)  do not require a host, server, or active monitor to assign media access control 
E)  have many collisions 
A)  work better than contention approaches for small networks that have low usage 
B)  work better than contention approaches for large networks that have high usage 
C)  work better than contention approaches for all sizes of networks 
D)  do not require a host, server, or active monitor to assign media access control 
E)  have many collisions

Question 8

________ is the process of sending a signal to a client that gives its permission to transmit or asks it to receive.

Accepted Answer

A)  Contention 
B)  Polling 
C)  Pooling 
D)  Carrier sense 
E)  CRC 
A)  Contention 
B)  Polling 
C)  Pooling 
D)  Carrier sense 
E)  CRC

Question 9

Compare and contrast roll call polling,hub polling (or token passing),and contention.Which is better,hub polling or contention? Explain.

Accepted Answer

The answer of Compare and contrast roll call polling,hub polling...

Question 10

Using parity,the probability for detecting an error,given that one has occurred,is:

Accepted Answer

A)  about 50% for either even or odd parity 
B)  about 70% for even parity and 30% for odd parity 
C)  about 30% for even parity and 70% for odd parity 
D)  about 0% for either even or odd parity 
E)  about 100% for either even or odd parity 
A)  about 50% for either even or odd parity 
B)  about 70% for even parity and 30% for odd parity 
C)  about 30% for even parity and 70% for odd parity 
D)  about 0% for either even or odd parity 
E)  about 100% for either even or odd parity

Question 11

Parity checking can only detect an error when an even number of bits are switched.

Accepted Answer

A) True 
 B)False

Question 12

The loss of power a signal suffers as it travels from the transmitting computer to a receiving computer is:

Accepted Answer

A)  white noise 
B)  spiking 
C)  attenuation 
D)  intermodulation noise 
E)  echo 
A)  white noise 
B)  spiking 
C)  attenuation 
D)  intermodulation noise 
E)  echo

Question 13

What is asynchronous transmission v.synchronous transmission? Describe one protocol of each type.

Accepted Answer

Asynchronous transmission and synchronou

Question 14

For effective error detection and correction,extra error detection "data" must be included with each message

Accepted Answer

A) True 
 B)False

Question 15

The familiar background static on radios and telephones is called:

Accepted Answer

A)  echoes 
B)  intermodulation noise 
C)  impulse noise 
D)  cross-talk 
E)  white noise 
A)  echoes 
B)  intermodulation noise 
C)  impulse noise 
D)  cross-talk 
E)  white noise

Question 16

Which of the following is true with respect to the data link layer?

Accepted Answer

A)  It accepts streams of bits from the application layer. 
B)  It is responsible for getting a message from one computer to another (one node to another) without errors. 
C)  It does not perform error detection. 
D)  It performs routing functions. 
E)  It organizes data from the physical layer and passes these coherent messages to the application layer. 
A)  It accepts streams of bits from the application layer. 
B)  It is responsible for getting a message from one computer to another (one node to another) without errors. 
C)  It does not perform error detection. 
D)  It performs routing functions. 
E)  It organizes data from the physical layer and passes these coherent messages to the application layer.

Question 17

Gaussian noise is a special type of attenuation.

Accepted Answer

A) True 
 B)False

Question 18

Wired Ethernet is standardized as IEEE802.11.

Accepted Answer

A) True 
 B)False

Question 19

What is transmission efficiency? How do information bits differ from overhead bits? What are three issues which might effect packet throughput rates? Which is better for file transfer,large packet sizes or small packet sizes?

Accepted Answer

Transmission efficiency refers to the ab

Question 20

_________________ is defined as the total number of information bits divided by the total number of bits in the transmission.

Accepted Answer

A)  Asynchronous rate 
B)  Protocol percentage 
C)  Throughput 
D)  Transmission Rate of Information Bits 
E)  Transmission efficiency 
A)  Asynchronous rate 
B)  Protocol percentage 
C)  Throughput 
D)  Transmission Rate of Information Bits 
E)  Transmission efficiency

Overhead bits are used for error checking and marking the start and end of characters and packets.

__________can obliterate a group of bits,causing a burst error.

As part of the five-layer network model used in this textbook,the data link layer sits directly between:

In a network,the type of errors caused during data transmission can be controlled by the network hardware and software.

HDLC is very similar to the SDLC synchronous data link protocol.

Errors on a network can occur:

In general,controlled approaches:

________ is the process of sending a signal to a client that gives its permission to transmit or asks it to receive.

Compare and contrast roll call polling,hub polling (or token passing),and contention.Which is better,hub polling or contention? Explain.

Using parity,the probability for detecting an error,given that one has occurred,is:

Parity checking can only detect an error when an even number of bits are switched.

The loss of power a signal suffers as it travels from the transmitting computer to a receiving computer is:

What is asynchronous transmission v.synchronous transmission? Describe one protocol of each type.

For effective error detection and correction,extra error detection "data" must be included with each message

The familiar background static on radios and telephones is called:

Which of the following is true with respect to the data link layer?

Gaussian noise is a special type of attenuation.

Wired Ethernet is standardized as IEEE802.11.

What is transmission efficiency? How do information bits differ from overhead bits? What are three issues which might effect packet throughput rates? Which is better for file transfer,large packet sizes or small packet sizes?

_________________ is defined as the total number of information bits divided by the total number of bits in the transmission.

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

Overhead bits are used for error checking and marking the start and end of characters and packets.

__________can obliterate a group of bits,causing a burst error.

As part of the five-layer network model used in this textbook,the data link layer sits directly between:

In a network,the type of errors caused during data transmission can be controlled by the network hardware and software.

HDLC is very similar to the SDLC synchronous data link protocol.

Errors on a network can occur:

In general,controlled approaches:

________ is the process of sending a signal to a client that gives its permission to transmit or asks it to receive.

Compare and contrast roll call polling,hub polling (or token passing),and contention.Which is better,hub polling or contention? Explain.

Using parity,the probability for detecting an error,given that one has occurred,is:

Parity checking can only detect an error when an even number of bits are switched.

The loss of power a signal suffers as it travels from the transmitting computer to a receiving computer is:

What is asynchronous transmission v.synchronous transmission? Describe one protocol of each type.

For effective error detection and correction,extra error detection "data" must be included with each message

The familiar background static on radios and telephones is called:

Which of the following is true with respect to the data link layer?

Gaussian noise is a special type of attenuation.

Wired Ethernet is standardized as IEEE802.11.

What is transmission efficiency? How do information bits differ from overhead bits? What are three issues which might effect packet throughput rates? Which is better for file transfer,large packet sizes or small packet sizes?

_________________ is defined as the total number of information bits divided by the total number of bits in the transmission.

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