Question 1

Which of the following is not a type of synchronous protocol?

Accepted Answer

A)  SDLC
B)  VT100
C)  HDLC
D)  Ethernet
E)  PPP

Question 2

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

Accepted Answer

A) True 
 B)False  False

Question 3

Describe from a high level perspective the packet layout for SDLC, Ethernet, and PPP.

Accepted Answer

The packet layout for SDLC (Synchronous ...

Question 4

__________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

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Cyclical redundancy check is one of the most popular polynomial error-checking schemes.

Accepted Answer

A) True 
 B)False

Question 7

Briefly describe how even parity and odd parity work.Give an example of even parity with a 7-bit ASCII code, for the following: 0110110, using a 0 start bit and a 1 stop bit.

Accepted Answer

Even parity and odd parity are methods u...

Question 8

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 encoding the bit-stream as a series of electronic voltages.
C)  It performs error detection.
D)  It performs routing functions.
E)  It organizes data from the physical layer and passes these coherent messages directly to the application layer.

Question 9

How does forward error correction work? How is it different from other error correction methods? Under what circumstances is forward error correction desirable? What is one type of forward error correction by name? Given a diagram like that in the text of forward error correction, be able to explain how the system works.

Accepted Answer

Forward error correction (FEC) is a meth...

Question 10

With __________ ARQ, the sender pauses for a response from the receiver to alter each message or packet of data.

Accepted Answer

A)  open window
B)  halt and be recognized HBR) 
C)  sliding window
D)  stop and wait
E)  continuous

Question 11

________ 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

Question 12

Impulse noise is caused by the thermal agitation of electrons.

Accepted Answer

A) True 
 B)False

Question 13

Stop-and-wait ARQ uses ___________ type of data flow.

Accepted Answer

A)  full simplex
B)  half complex
C)  full duplex
D)  half duplex
E)  full complex

Question 14

_____________ is an effective way to prevent impulse noise, cross talk, and intermodulation noise.

Accepted Answer

A)  Shielding wires
B)  Adding fluorescent lights
C)  Adding repeaters to a circuit
D)  Adding amplifiers to a circuit
E)  Shorting a circuit

Question 15

In communication protocols, _________ are used to convey the user's meaning.

Accepted Answer

A)  information bits
B)  overhead bits
C)  stop bits
D)  start bits
E)  flag bits

Question 16

What does the data link layer do? What are its primary responsibilities? Where does the data link layer sit in terms of the simplified five layer network model?

Accepted Answer

The data link layer is responsible for the reliable transmission of data across a physical network link. Its primary responsibilities include framing, addressing, error detection and correction, and flow control.

In terms of the simplified five layer network model, the data link layer sits between the physical layer and the network layer. It is responsible for providing a reliable link between two directly connected nodes, ensuring that data is transmitted accurately and efficiently. This layer also handles the physical addressing of devices on the network and manages the flow of data between them. Overall, the data link layer plays a crucial role in ensuring the smooth and reliable transmission of data within a network.

Question 17

Data transmission errors are typically uniformly distributed in time.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following media is least susceptible to noise?

Accepted Answer

A)  fiber optic cable
B)  coaxial cable
C)  twisted pair
D)  unshielded twisted pair
E)  shielded twisted pair A

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

Undesirable stray electrical voltage can cause data communication errors.

Accepted Answer

A) True 
 B)False

Exam 4: Data Link Layer

Which of the following is not a type of synchronous protocol?

Correct Answer
verified

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

Correct Answer
verified
False

Describe from a high level perspective the packet layout for SDLC, Ethernet, and PPP.

Correct Answer
Answered by ExamLex AI
The packet layout for SDLC (Synchronous ...
View Answer

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

Correct Answer
verified

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

Correct Answer
verified

Cyclical redundancy check is one of the most popular polynomial error-checking schemes.

Correct Answer
verified

Briefly describe how even parity and odd parity work.Give an example of even parity with a 7-bit ASCII code, for the following: 0110110, using a 0 start bit and a 1 stop bit.

Correct Answer
Answered by ExamLex AI
Even parity and odd parity are methods u...
View Answer

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

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Forward error correction (FEC) is a meth...
View Answer

With __________ ARQ, the sender pauses for a response from the receiver to alter each message or packet of data.

Correct Answer
verified

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

Correct Answer
verified

Impulse noise is caused by the thermal agitation of electrons.

Correct Answer
verified

Stop-and-wait ARQ uses ___________ type of data flow.

Correct Answer
verified

_____________ is an effective way to prevent impulse noise, cross talk, and intermodulation noise.

Correct Answer
verified

In communication protocols, _________ are used to convey the user's meaning.

Correct Answer
verified

What does the data link layer do? What are its primary responsibilities? Where does the data link layer sit in terms of the simplified five layer network model?

Data transmission errors are typically uniformly distributed in time.

Correct Answer
verified

Which of the following media is least susceptible to noise?

Correct Answer
verified
A

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

Correct Answer
verified

Undesirable stray electrical voltage can cause data communication errors.

Correct Answer
verified

Exam 4: Data Link Layer

Which of the following is not a type of synchronous protocol?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedFalse

Describe from a high level perspective the packet layout for SDLC, Ethernet, and PPP.

Correct AnswerAnswered by ExamLex AIThe packet layout for SDLC (Synchronous ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cyclical redundancy check is one of the most popular polynomial error-checking schemes.

Correct AnswerverifiedShow Answer

Briefly describe how even parity and odd parity work.Give an example of even parity with a 7-bit ASCII code, for the following: 0110110, using a 0 start bit and a 1 stop bit.

Correct AnswerAnswered by ExamLex AIEven parity and odd parity are methods u...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerAnswered by ExamLex AIForward error correction (FEC) is a meth...View AnswerShow Answer

With __________ ARQ, the sender pauses for a response from the receiver to alter each message or packet of data.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Impulse noise is caused by the thermal agitation of electrons.

Correct AnswerverifiedShow Answer

Stop-and-wait ARQ uses ___________ type of data flow.

Correct AnswerverifiedShow Answer

_____________ is an effective way to prevent impulse noise, cross talk, and intermodulation noise.

Correct AnswerverifiedShow Answer

In communication protocols, _________ are used to convey the user's meaning.

Correct AnswerverifiedShow Answer

What does the data link layer do? What are its primary responsibilities? Where does the data link layer sit in terms of the simplified five layer network model?

Data transmission errors are typically uniformly distributed in time.

Correct AnswerverifiedShow Answer

Which of the following media is least susceptible to noise?

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

Undesirable stray electrical voltage can cause data communication errors.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
Answered by ExamLex AI
The packet layout for SDLC (Synchronous ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Even parity and odd parity are methods u...
View Answer

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Forward error correction (FEC) is a meth...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified