Name: 
 

IC3 - Lesson 23



True/False
Indicate whether the statement is true or false.
 

 1. 

A telephone line can be a communications path.
 

 2. 

In data communications, the sending device is generally a computer.
 

 3. 

Most LANs are made up of several connected WANs.
 

 4. 

Transmissions using radio signals require line of sight.
 

 5. 

A microwave signal is sent through space in the form of optical waves.
 

 6. 

Computer information is stored digitally.
 

 7. 

A WAN determines the fastest available path to send packets of data on their way to their correct destination.
 

 8. 

The largest WAN is the Internet.
 

 9. 

A peer-to-peer network is easier to maintain than a client/server network.
 

 10. 

All computers require an operating system.
 

 11. 

A LAN is a network that covers a large geographical area.
 

 12. 

Most wired communications will soon use fiber optics.
 

 13. 

Unlike radio signals, microwaves do not have line of sight problems and do not need to be sent in straight lines from one station to the next.
 

 14. 

Cable modems allow as many as a thousand users to transmit data on one channel.
 

 15. 

A hub is a card that enables a laptop computer to send and receive data over a network.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 16. 

The transmission of data from one location to another is known as data ____.
a.
communications
c.
networking
b.
authentications
d.
modeming
 

 17. 

In a computer network, the ____ is the computer that relies on the server for resources.
a.
channel
c.
client
b.
modem
d.
path device
 

 18. 

Most networks have at least one ____ and many clients.
a.
modem
c.
data
b.
server
d.
WAN
 

 19. 

Which is the least expensive type of cable?
a.
twisted-pair
c.
shielded
b.
coaxial
d.
unshielded
 

 20. 

To send data through a communications channel, you need some type of ____.
a.
telephone system
c.
data
b.
signal translator
d.
transmission media
 

 21. 

Which type of cable is made of glass?
a.
coaxial
c.
twisted-pair
b.
fiber-optic
d.
radio band
 

 22. 

____ determines the amount of data that can be sent at one time.
a.
Modem
c.
Demodulation
b.
Modulation
d.
Bandwidth
 

 23. 

What does a modem do?
a.
It converts optical signals to digital and vice versa.
b.
It converts analog signals to modemic and vice versa.
c.
It converts analog signals to digital and vice versa.
d.
It converts analog signals to optical and vice versa.
 

 24. 

A ____ is a special computer that connects one LAN to another LAN.
a.
bridge
c.
hub
b.
gateway
d.
PC
 

 25. 

In a peer-to-peer network, no computer is designated as the ____.
a.
application
c.
peer
b.
server
d.
client
 

 26. 

The geometric arrangement in which a network is set up is known as its ____.
a.
client
c.
topology
b.
peer-to-peer
d.
bottleneck
 

 27. 

____ is a benefit of using a network.
a.
Hardware sharing
c.
Geometric arrangement
b.
Unauthorized access
d.
All of the above
 

 28. 

____ cable is heavily shielded and is the primary type of cable used by the cable television industry.
a.
Fiber-optic
c.
Coaxial
b.
Microwave
d.
Copper
 

 29. 

Because they are placed in orbit 22,300 feet above Earth and rotate at the same speed as the Earth, ____ can maintain a constant position above the surface for communication transmission.
a.
satellites
c.
fiber-optic networks
b.
wireless networks
d.
modems
 

 30. 

The first modems introduced in the 1960s could transmit data at the rate of ____.
a.
9600 bits per second
c.
75 bits per second
b.
56 megabits per second
d.
300 bits per second
 

Completion
Complete each statement.
 

 31. 

A(n) ____________________ is a group of two or more computers that are linked together.
 

 

 32. 

A(n) ____________________ is a computer that manages network resources.
 

 

 33. 

In data communications, the ____________________ converts the computer signal into signals that are supported by the communications channel.
 

 

 34. 

In radio transmission, you need a transmitter to send the signal and a(n) ____________________ to accept the signal.
 

 

 35. 

A cable modem uses ____________________ cable.
 

 

 36. 

In networking, a geometric arrangement of devices is also known as a(n) ____________________.
 

 

 37. 

A(n) ____________________ links two different types of networks that use different protocols.
 

 

 38. 

An endpoint of a network connection, such as a computer terminal or printer, is called a(n) ____________________.
 

 

 39. 

A(n) ____________________ directs network traffic, connecting multiple networks and determining the fastest available path to send packets to their destination.
 

 

 40. 

Software and hardware devices that protect a network from unauthorized entry are called ____________________.
 

 

 41. 

A computer on a network that relies on the server for resources is called a(n) ____________________.
 

 

 42. 

The link through which data can be transferred from one computer to another is called the ____________________ channel.
 

 

 43. 

_________________________ can be either physical or wireless.
 

 

 44. 

A(n) ____________________ is the smallest measurement of data, composed of a single binary code of either 0 or 1.
 

 

 45. 

Network ____________________ describes how a network of computers communicates, either directly or through a server.
 

 

 46. 

A(n) ____________________ is a network that covers a large geographical area such as a state, an entire country, or the whole world.
 

 

 47. 

Computer ____________________ is the use of computers to create a simulation of a real-life system or process and then test it under different conditions.
 

 

 48. 

____________________ information systems are used by engineers and urban planners to store and share information about a community on a computer network.
 

 

 49. 

A network requires _________________________ software, which runs on the server and provides administration, security, and management services to client computers.
 

 

 50. 

Radio signals and satellite transmissions are examples of ____________________ media.
 

 



 
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