Question 1

To keep one signal from interfering with another signal,a set of unused frequencies called a(n)____________________ is usually inserted between the two signals,to provide a form of insulation.

Accepted Answer

The answer of To keep one signal from interfering with...

Question 2

Code division multiplexing,while using a fairly wide bandwidth of frequencies and a complex technology,is scalable like WDM.

Accepted Answer

A) True 
 B)False

Question 3

____ uses different wavelength (frequency)lasers to transmit multiple signals at the same time over a single medium.

Accepted Answer

A)  Wave division multiplexing 
B)  Statistical time division multiplexing 
C)  Channel division multiplexing 
D)  Time division multiplexing

Question 4

____ technology is a unique form of multiplexing in that all the subchannels multiplexed together are intended for one user.

Accepted Answer

A)  Time division 
B)  Discrete multitone 
C)  Frequency division 
D)  Code division

Question 5

____ division multiplexing is a good choice for connecting a number of lower-speed devices that do not transmit data on a continuous basis to a remote computer system.

Accepted Answer

A)  Statistical time 
B)  Time 
C)  Discrete tone 
D)  Frequency

Question 6

The basic way to perform compression is to look for some common pattern in the data and replace each data pattern with a symbol or symbols that will consume less space during transmission or storage.

Accepted Answer

A) True 
 B)False

Question 7

It is relatively simple to multiplex four STS-12 signals into one ____ signal.

Accepted Answer

A)  STS-8 
B)  STS-16 
C)  STS-32 
D)  STS-48

Question 8

____ is the technology behind the popular digital subscriber line (DSL)system.

Accepted Answer

A)  Time division 
B)  Amplitude division 
C)  Wavelength division 
D)  Discrete multitone

Question 9

The MP3 encoder produces a data stream that has a much faster data rate than that of conventional CD-quality music.

Accepted Answer

A) True 
 B)False

Question 10

Synchronous time division multiplexing does not require as high-speed a line as statistical time division multiplexing does.

Accepted Answer

A) True 
 B)False

Question 11

If a compression technique does lose some of the data as a result of the compression process,then it is referred to as a ____ compression technique.

Accepted Answer

A)  complete 
B)  random 
C)  lossy 
D)  lossless

Question 12

Statistical time division multiplexing is sometimes called ____ time division multiplexing.

Accepted Answer

A)  empirical 
B)  random 
C)  asynchronous 
D)  synchronous

Question 13

Each STS level supports a particular data rate and is supported by a physical specification called a(n)____________________.

Accepted Answer

The answer of Each STS level supports a particular data...

Question 14

Presently,a medium can be divided in three basic ways: a division of ____,a division of time,and a division of transmission codes.

Accepted Answer

A)  frequencies 
B)  amplitudes 
C)  wavelength 
D)  direction

Question 15

____________________ is a multiplexing technique commonly found in digital subscriber line (DSL)systems.

Accepted Answer

The answer of ____________________ is a multiplexing technique commonly found...

Question 16

First-generation cellular telephone systems allocated channels using frequency ranges within the 800 to ____ megahertz (MHz)spectrum.

Accepted Answer

A)  830 
B)  900 
C)  930 
D)  960

Question 17

Discrete multitone (DMT)is a multiplexing techinque commonly found in _______ systems.

Accepted Answer

A)  TDM 
B)  DSL 
C)  ATM 
D)  microwave

Question 18

The technique of transmitting multiple signals over a single medium is ____________________.

Accepted Answer

The answer of The technique of transmitting multiple signals over...

Question 19

When WDM can support a large number of lambdas,it is often called ____________________.

Accepted Answer

The answer of When WDM can support a large number...

Question 20

____________________ are the codes assigned to users in CDM.

Accepted Answer

The answer of ____________________ are the codes assigned to users...

Exam 5: Making Connections Efficient: Multiplexing and Compression

To keep one signal from interfering with another signal,a set of unused frequencies called a(n)____________________ is usually inserted between the two signals,to provide a form of insulation.

Code division multiplexing,while using a fairly wide bandwidth of frequencies and a complex technology,is scalable like WDM.

____ uses different wavelength (frequency) lasers to transmit multiple signals at the same time over a single medium.

____ technology is a unique form of multiplexing in that all the subchannels multiplexed together are intended for one user.

____ division multiplexing is a good choice for connecting a number of lower-speed devices that do not transmit data on a continuous basis to a remote computer system.

The basic way to perform compression is to look for some common pattern in the data and replace each data pattern with a symbol or symbols that will consume less space during transmission or storage.

It is relatively simple to multiplex four STS-12 signals into one ____ signal.

____ is the technology behind the popular digital subscriber line (DSL) system.

The MP3 encoder produces a data stream that has a much faster data rate than that of conventional CD-quality music.

Synchronous time division multiplexing does not require as high-speed a line as statistical time division multiplexing does.

If a compression technique does lose some of the data as a result of the compression process,then it is referred to as a ____ compression technique.

Statistical time division multiplexing is sometimes called ____ time division multiplexing.

Each STS level supports a particular data rate and is supported by a physical specification called a(n)____________________.

Presently,a medium can be divided in three basic ways: a division of ____,a division of time,and a division of transmission codes.

____________________ is a multiplexing technique commonly found in digital subscriber line (DSL)systems.

First-generation cellular telephone systems allocated channels using frequency ranges within the 800 to ____ megahertz (MHz) spectrum.

Discrete multitone (DMT) is a multiplexing techinque commonly found in _______ systems.

The technique of transmitting multiple signals over a single medium is ____________________.

When WDM can support a large number of lambdas,it is often called ____________________.

____________________ are the codes assigned to users in CDM.