Question 1

Which of the following is true about the data link protocol, PPP?

Accepted Answer

A) it is commonly used in WANs 
B) it is a bit-oriented protocol 
C) it uses block check characters for error detection 
D) it was developed in the 1960s 
E) it uses parity bits for error detection 
A) it is commonly used in WANs 
B) it is a bit-oriented protocol 
C) it uses block check characters for error detection 
D) it was developed in the 1960s 
E) it uses parity bits for error detection

Question 2

____________ 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 3

________ has essentially replaced SDLC and offers a larger sliding window.

Accepted Answer

A) Ethernet 
B) PPP 
C) Asynchronous transmission 
D) HDLC 
E) full complex 
A) Ethernet 
B) PPP 
C) Asynchronous transmission 
D) HDLC 
E) full complex

Question 4

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 5

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. 
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 6

The two categories of network errors are: lost data and delimited data.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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

Question 9

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 10

The data link layer uses the ________ to recognize the source and destination addresses.

Accepted Answer

A) MAC address 
B) IP address 
C) URL 
D) Email address 
E) Local router 
A) MAC address 
B) IP address 
C) URL 
D) Email address 
E) Local router

Question 11

If a computer transmits a message containing "ABC" and the destination computer receives "abc" as the message, the message is corrupted.

Accepted Answer

A) True 
 B)False

Question 12

One type of forward error correction is the Hamming code.

Accepted Answer

A) True 
 B)False

Question 13

________ 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 14

Contention is commonly used with Ethernet local area networks.

Accepted Answer

A) True 
 B)False

Question 15

_________________ 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

Question 16

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

Question 17

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 18

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 19

Undesirable stray electrical voltage can cause data communication errors.

Accepted Answer

A) True 
 B)False

Question 20

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

Which of the following is true about the data link protocol, PPP?

____________ is not a function of a data link protocol.

________ has essentially replaced SDLC and offers a larger sliding window.

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.

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

The two categories of network errors are: lost data and delimited data.

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

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

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

The data link layer uses the ________ to recognize the source and destination addresses.

If a computer transmits a message containing "ABC" and the destination computer receives "abc" as the message, the message is corrupted.

One type of forward error correction is the Hamming code.

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

Contention is commonly used with Ethernet local area networks.

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

Which of the following media is least susceptible to noise?

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

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?

Undesirable stray electrical voltage can cause data communication errors.

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

Introduction to Data Communications

Application Layer

Physical Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters

Exam 4: Data Link Layer

Which of the following is true about the data link protocol, PPP?

____________ is not a function of a data link protocol.

________ has essentially replaced SDLC and offers a larger sliding window.

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.

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

The two categories of network errors are: lost data and delimited data.

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

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

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

The data link layer uses the ________ to recognize the source and destination addresses.

If a computer transmits a message containing "ABC" and the destination computer receives "abc" as the message, the message is corrupted.

One type of forward error correction is the Hamming code.

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

Contention is commonly used with Ethernet local area networks.

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

Which of the following media is least susceptible to noise?

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

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?

Undesirable stray electrical voltage can cause data communication errors.

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

Introduction to Data Communications

Application Layer

Physical Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters