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

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 3

With contention:

Accepted Answer

A) computers wait until the circuit is free before they send data 
B) the server or front end processor works consecutively through a list of clients to determine who should have access to the media 
C) the front end processor must wait for a response from the polled client or terminal 
D) one computer starts the poll and passes it to the next computer on the multipoint circuit 
E) there is never a chance for "collision," or two computers trying to send data at the same time 
A) computers wait until the circuit is free before they send data 
B) the server or front end processor works consecutively through a list of clients to determine who should have access to the media 
C) the front end processor must wait for a response from the polled client or terminal 
D) one computer starts the poll and passes it to the next computer on the multipoint circuit 
E) there is never a chance for "collision," or two computers trying to send data at the same time

Question 4

Which of the following is true about roll call polling?

Accepted Answer

A) It can not be modified to increase priority of clients or terminals. 
B) It does not require a server or host or special device that performs the polling. 
C) It is also called token passing. 
D) It is a type of contention approach to media access control. 
E) It typically involves some waiting because the server has to wait for a response from the polled client or terminal. 
A) It can not be modified to increase priority of clients or terminals. 
B) It does not require a server or host or special device that performs the polling. 
C) It is also called token passing. 
D) It is a type of contention approach to media access control. 
E) It typically involves some waiting because the server has to wait for a response from the polled client or terminal.

Question 5

Attenuation refers to the loss of signal strength.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

TRIB, an acronym that relates to throughput, stands for:

Accepted Answer

A) Throughput Reduction of Information Barriers 
B) Transmission Rate of Information Bits 
C) Throughput Rate of Iso-synchronous Bytes 
D) Transmission Regulation for Inverse-multiplexing Bands 
E) Trellis-coded Regulation of Information Bits 
A) Throughput Reduction of Information Barriers 
B) Transmission Rate of Information Bits 
C) Throughput Rate of Iso-synchronous Bytes 
D) Transmission Regulation for Inverse-multiplexing Bands 
E) Trellis-coded Regulation of Information Bits

Question 8

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 9

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

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 10

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

Accepted Answer

A) True 
 B)False

Question 11

Cross-talk:

Accepted Answer

A) occurs when one circuit picks up signals in another 
B) is always bothersome because it has a high signal strength 
C) decreases with increased proximity of two wires 
D) decreases during wet or damp weather 
E) increases with lower frequency signals 
A) occurs when one circuit picks up signals in another 
B) is always bothersome because it has a high signal strength 
C) decreases with increased proximity of two wires 
D) decreases during wet or damp weather 
E) increases with lower frequency signals

Question 12

Another term for stop-and-wait ARQ is sliding window.

Accepted Answer

A) True 
 B)False

Question 13

The two sublayers of the data link layer consist of the media access control sublayer and the________ .

Accepted Answer

A) logical link control sublayer 
B) network control sublayer 
C) session sublayer 
D) physical sublayer 
E) transport sublayer 
A) logical link control sublayer 
B) network control sublayer 
C) session sublayer 
D) physical sublayer 
E) transport sublayer

Question 14

Which of the following is way to reduce or eliminate crosstalk on a circuit?

Accepted Answer

A) physically separating the cables from other communication cables 
B) adding repeaters or amplifiers to a circuit 
C) reducing the length of the cable 
D) adding fluorescent lights 
E) shorting a circuit 
A) physically separating the cables from other communication cables 
B) adding repeaters or amplifiers to a circuit 
C) reducing the length of the cable 
D) adding fluorescent lights 
E) shorting a circuit

Question 15

How does cyclical redundancy checking work?

Accepted Answer

Cyclic Redundancy Check (CRC) is an erro

Question 16

____________ refers to bits that have been changed, in error, from 1 to 0, or vice versa, in a data transmission.

Accepted Answer

A) Contracted bits 
B) Polled bits 
C) Inverse multiplexed bits 
D) Flipped bits 
E) Bit delineation 
A) Contracted bits 
B) Polled bits 
C) Inverse multiplexed bits 
D) Flipped bits 
E) Bit delineation

Question 17

The data link layer accepts messages from the network layer and controls the hardware that transmits them.

Accepted Answer

A) True 
 B)False

Question 18

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

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.

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

With contention:

Which of the following is true about roll call polling?

Attenuation refers to the loss of signal strength.

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

TRIB, an acronym that relates to throughput, stands for:

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?

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

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

Cross-talk:

Another term for stop-and-wait ARQ is sliding window.

The two sublayers of the data link layer consist of the media access control sublayer and the________ .

Which of the following is way to reduce or eliminate crosstalk on a circuit?

How does cyclical redundancy checking work?

____________ refers to bits that have been changed, in error, from 1 to 0, or vice versa, in a data transmission.

The data link layer accepts messages from the network layer and controls the hardware that transmits them.

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

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.

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

With contention:

Which of the following is true about roll call polling?

Attenuation refers to the loss of signal strength.

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

TRIB, an acronym that relates to throughput, stands for:

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?

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

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

Cross-talk:

Another term for stop-and-wait ARQ is sliding window.

The two sublayers of the data link layer consist of the media access control sublayer and the________ .

Which of the following is way to reduce or eliminate crosstalk on a circuit?

How does cyclical redundancy checking work?

____________ refers to bits that have been changed, in error, from 1 to 0, or vice versa, in a data transmission.

The data link layer accepts messages from the network layer and controls the hardware that transmits them.

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