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Data Communication Lesson

Total questions: 120

Worksheet time: 56mins

Name
Class
Date
1.

Bandwidth is measured by ...

a)

megabyte rate

b)

byte rate

c)

bit rate

d)

gygabyte rate

2.

Latency is measured in ...

a)

miliseconds

b)

seconds

c)

megabytes per second

d)

bits per second

3.

Time it takes for a bit to travel from one place to another is called ...

a)

Copper cable

b)

Bandwidth

c)

Bit rate

d)

Latency

4.
Transmission capacity measure by bit rate
a)
Bit rate
b)
Bytes
c)
Bandwidth
d)
Latency
5.
Makes the file smaller by deleting parts of the file permanently (forever)
a)
Lossy Compression
b)
Lossless Compression
6.
Makes the file smaller by giving repeated patterns/colors a specific code
a)
Lossy Compression
b)
Lossless Compression
7.

What type of compression allows you to reconstruct the original data?

a)

Lossless compression

b)

Lossy compression

8.

What type of compression does not allow you to reconstruct the original data?

a)

Lossless compression

b)

Lossy compression

9.

How much delay there is in your internet connection

a)

Latency

b)

Bandwidth

10.

How much data you can download per second

a)

Latency

b)

Bandwidth

11.

How many people can use the internet at the same time

a)

Latency

b)

Bandwidth

12.

How far away you are from a network hub affects...

a)

Latency

b)

Bandwidth

13.
A user goes on a website and it begins to load immediately is an example of...
a)
High Latency
b)
Low Latency
14.
A user goes on a website but it takes a long time to load completely and pictures appear slowly, one by one.
a)
High Bandwidth
b)
Low Bandwidth
15.
A user goes on a website and it begins to load immediately, and it completely loads quickly.
a)
High Bandwidth
b)
Low Bandwidth
16.

Network performance refers to how well data is transmitted through the network.

a)

False

b)

True

17.

The "bit rate" measures ....

a)

the server speed

b)

the cable speed

c)

the network speed

18.

Megabits per second (Mbps) refers to a speed of ....

a)

a million bits per second

b)

a hundred bits per second

c)

a thousand bits per second

d)

a thousand million bits per second

19.

This term describes how much data can be transferred over a connection in a given time.

a)

Transmission media

b)

Contention ratio

c)

Bandwidth

20.

Bandwidth is about the speed the data is transmitted.

a)

False

b)

True

21.

The number of users on a network can affect the network performance

a)

True

b)

False

22.

The ...... can be used to measure the ratio of users compared to the available bandwidth

a)

network ratio

b)

contention ratio

c)

bandwidth ratio

23.

Wireless connections can carry more data around the network than wired connections

a)

False

b)

True

24.

Small LANs are more likely to make use of ...

a)

fibre optic cables

b)

copper Ethernet cables

25.

Fibre optic cables are often used for WANs because ....

a)

they provide very high bandwidth

b)

they need less technical skill to set up than Wi-Fi

c)

they can transmit images, video and music

26.

...... can be used to try and reduce interference

a)

Wider cables

b)

Shielded cables

c)

Shorter cables

27.

On a wireless network ..... can introduce errors

a)

radio interference

b)

electric motors

c)

satellite interference

28.

As a cable get ...... the signal can become too weak and errors can begin to creep in.

a)

narrower

b)

longer

c)

shorter

d)

wider

29.

...... describes how much time it takes for a data packet to travel across the network.

a)

Larceny

b)

Latency

c)

Literacy

d)

Lag

30.

Networks with long delays are called .....

a)

high latency networks

b)

slow latency netwokrs

c)

low latency netwokrs

d)

fast latency networks

31.

A computer network is a system of:

a)

two or more computing devices connected to one another

b)

Data transfer and information storage

c)

Sharing devices like scanners

d)

A whole lot of individual machines working on their own

32.

The capacity of data transfer in a system.

a)

Bandwidth

b)

Bitrate

c)

Latency

d)

Network

33.

The time it takes for a bit to get from sender to receiver.

a)

Network

b)

Latency

c)

Bandwidth

d)

Bitrate

34.
What happens when everyone in your house connects to your wireless access point/router with wi-fi enabled devices?
a)
The network becomes faster.
b)
The performance is not affected.
c)
The network becomes slower.
35.

The number of users on a network can affect the network performance

a)

True

b)

False

36.
A user goes on a website and it begins to load immediately is an example of...
a)
High Latency
b)
Low Latency
37.
A user goes on a website but it takes a long time to load completely and pictures appear slowly, one by one.
a)
High Bandwidth
b)
Low Bandwidth
38.
A user goes on a website and it takes a long time to begin loading
a)
High Latency
b)
Low Latency
39.

Network performance refers to how well data is transmitted through the network.

a)

False

b)

True

40.

This term describes how much data can be transferred over a connection in a given time.

a)

Transmission media

b)

Contention ratio

c)

Bandwidth

41.

A VOIP call has started to lose connection regarding sound, what issue is this?

a)

Jitter

b)

W-Latency

c)

P-Jitter

d)

wrong patch cords

42.

What is Jitter?

a)

Very expensive equipment used for LANs and WANs

b)

It describes how much data can be changed.

c)

The amount of change in the delay of packets.

d)

Bandwidth.

43.
LAN stands for
a)
Local Area Network
b)
Large Area Network
c)
Little Area Network
d)
Local Analogue Network
44.
A LAN can span several sites over a global area
a)
False
b)
True
45.
A WAN is a network within one building
a)
False
b)
True
46.
To connect a LAN to another LAN a WAN could be used
a)
True
b)
False
47.
A WAN can spread over a vast area and include several LANs
a)
True
b)
False
48.
Which one of these items describes a LAN?
a)
A computer network covering a small geographic area, like a home, office, school, or group of buildings.
b)
A computer network that covers a broad area (e.g. any network whose communications links cross metropolitan, regional, or national boundaries over a long distance).
49.
A network with over 500 computers connected is considered to be a WAN
a)
False
b)
True
50.
Which one is true of a WAN?
a)
Can span two countries
b)
Is completely secure
c)
Has over 500 devices connected to it
d)
Is very fast
51.
A network is described as a WAN or a LAN based on the geographical spread of the network
a)
True
b)
False
52.

Is the maximum amount of data that can pass through the medium (e.g. wire) per second...

a)

Latency

b)

Bit Rate

c)

Bandwidth

d)

Durability

53.

Packet loss is the percentage of packets which are corrupted and don't correctly arrive with the receiver.

a)

True

b)

False

54.

This term describes how much data can be transferred over a connection in a given time.

a)

Transmission media

b)

Contention ratio

c)

Bandwidth

55.

The number of users on a network can affect the network performance

a)

True

b)

False

56.

Wireless connections can carry more data around the network than wired connections

a)

False

b)

True

57.

Fibre optic cables are often used for WANs because ....

a)

they provide very high bandwidth

b)

they need less technical skill to set up than Wi-Fi

c)

they can transmit images, video and music

58.

As a cable get ...... the signal can become too weak packets can be dropped.

a)

narrower

b)

longer

c)

shorter

d)

wider

59.

...... describes how much time it takes for a data packet to travel across the network.

a)

Larceny

b)

Latency

c)

Literacy

d)

Lag

60.

........... and ............ limitations can affect the performance of a network

a)

Hardware (e.g Routers and Switches)

b)

Network

c)

Topology

d)

Software

61.

Which affects network performance...?

a)

The package you choose with your ISP (e.g. FastFibre or Standard)

b)

High Network Traffic

c)

No. of Users

d)

Bandwidth - i.e. data transfer rate

62.

High network traffic can lead to collisions of data packets.

a)

True

b)

False

63.

A high number of users can cause network congestion, leading to packets being queued before they can be transmitted by routers and switches.

a)

True

(must be - sounds scientific)

b)

False

(I'm no fool!)

64.

which one is NOT an advantage of networks

a)

saves money on resources

b)

allows for central backups

c)

can access files from different devices

d)

can spread viruses

65.

High bandwidth is a good thing

a)

True

b)

False

66.

High latency is a good thing

a)

True

b)

False

67.

Bandwidth is the same as connection speed

a)

True

b)

False

68.

Tick ALL the factors that can affect network performance

a)

Latency

b)

Collisions

c)

Bandwith

d)

Connection speeds

69.

A star topology will cause a network failure if...

a)

If the hub/switch fails

b)

If one of the many of the computers fail

c)

If the printer fails

70.

What is bandwidth?

a)

The amount of data that can be carried at any one time.

b)

The overall amount of data I use in a month.

c)

The speed of my data per second to a friend and back.

71.

What is a protocol?

a)

An agreed way of communicating between the sending and receiving device

b)

A network device that connects to a router.

72.

Ethernet is a family of protocols that are responsible for sending and receiving a data along a cable. True or False?

a)

True

b)

False

73.

The core of a(n) ______ consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals.

a)

coaxial cable

b)

twisted-pair cable

c)

fiber-optic cable

d)

TCP/IP

74.

_____ is the time it takes a signal to travel from one location to another on a network.

a)

sending

b)

latency

c)

receiving

d)

communicaions device

75.
 Which Network Diagrams is it ?
a)
PAN
b)
LAN
c)
MAN
d)
WAN
76.

What is Bluetooth?

a)

Wireless technology for exchanging data over short distances.

b)

Wireless technology for exchanging data over long distances.

77.

What is another term for PERSONAL HOTSPOT

a)

Tethering

b)

Weathering

c)

Teething

78.

If 2 computers try to send data packets at the same time there could be a ...

a)

Disaster

b)

Crash

c)

Collision

d)

Conflict

79.

A fibre optic cable will have the fastest connection

a)

True

b)

False

80.

Which of these is NOT a wireless connection?

a)

Bluetooth

b)

4G

c)

Wi-fi

d)

Ethernet

81.

What type of topology is this?

a)

Bus

b)

Star

c)

Ring

d)

Mesh

82.

What type of topology is this?

a)

Bus

b)

Star

c)

Ring

d)

Mesh

83.

What type of topology is this?

a)

Bus

b)

Star

c)

Ring

d)

Mesh

84.
Data is transmitted one bit at a time down a single wire
a)
Serial Transmission
b)
TCP/IP
c)
FTP
d)
HTTP
e)
Protocols
85.
Data is transmitted several bits at a time using multiple wires
a)
Parallel Transmission
b)
Serial Transmission
c)
TCP/IP
d)
FTP
e)
HTTP
86.
A measure of the capacity of the channel down which the data is being sent. Measured in Hertz.
a)
Bandwidth
b)
Parallel Transmission
c)
Serial Transmission
d)
TCP/IP
e)
FTP
87.
The rate at which data is actually being transmitted. Measured in bits per second.
a)
Bit Rate
b)
Bandwidth
c)
Parallel Transmission
d)
Serial Transmission
e)
TCP/IP
88.
The time delay that occurs when transmitting data between devices.
a)
Latency
b)
Bit Rate
c)
Bandwidth
d)
Parallel Transmission
e)
Serial Transmission
89.
Data is transmitted between two devices that do not share a common clock.
a)
Asynchronous Data Transmission
b)
Latency
c)
Bit Rate
d)
Bandwidth
e)
Parallel Transmission
90.
A bit used to indicate the start of a unit of data in asynchronous data transmission.
a)
Start Bit
b)
Asynchronous Data Transmission
c)
Latency
d)
Bit Rate
e)
Bandwidth
91.
A bit used to indicate the end of a unit of data in asynchronous data transmission.
a)
Stop Bit
b)
Start Bit
c)
Asynchronous Data Transmission
d)
Latency
e)
Bit Rate
92.
A method of checking binary codes by counting the number of 0s and 1s in the code.
a)
Parity Bit
b)
Stop Bit
c)
Start Bit
d)
Asynchronous Data Transmission
e)
Latency
93.
A set of rules
a)
Protocols
b)
Parity Bit
c)
Stop Bit
d)
Start Bit
e)
Asynchronous Data Transmission
94.
The protocol to define the identification, request and transfer of multimedia content over the internet
a)
HTTP
b)
Protocols
c)
Parity Bit
d)
Stop Bit
e)
Start Bit
95.
A protocol for handling file uploads and downloads.
a)
FTP
b)
HTTP
c)
Protocols
d)
Parity Bit
e)
Stop Bit
96.
A set of protocols for all TCP/IP network transmissions.
a)
TCP/IP
b)
FTP
c)
HTTP
d)
Protocols
e)
Parity Bit
97.

What is a standalone computer?

a)

A computer that is not connected to a network

b)

A computer that is being used as a server

c)

A computer that does not have any peripherals attached to it

d)

A computer that is only used by one person

98.

Which of these is a characteristic of a LAN?

a)

It covers a wide geographical area

b)

Computers are connected together using a leased line or a satellite

c)

User can share files and peripherals

d)

Data can only be transmitted at a slow rate

99.

Which of these is a characteristic of a WAN

a)

It covers a small geographical area

b)

Normally has a lower bandwidth than a LAN

c)

It is contained within one building

d)

User are not able to share files and peripherals

100.

Which of these statements is true?

a)

A client-server network has a central computer that provides services to the rest of the network

b)

A client-server network is cheap and easy to set up

c)

A client-server network cannot be used to share files

d)

Each computer on a client-server network is maintain separately

101.

Which of these statements is true?

a)

A client-server network has a central computer that provides services to the rest of the network

b)

A client-server network is cheap and easy to set up

c)

A client-server network cannot be used to share files

d)

Each computer on a client-server network is maintain separately

102.

Where are you most likely to find a peer-to-per network?

a)

In a large organisation

b)

In a home

c)

In a large office

d)

Across several offices in a company

103.

Which of these is a benefit of a peer-to-peer network?

a)

Antivirus scans can be run across all computers from one computer

b)

All software updates can be run across all computers from one computer

c)

All computers can be maintained from one computer

d)

Files and peripherals can be shared

104.

Which of these is the correct definition of a router?

a)

Forwards data packets along a network

b)

Corrects errors that are found in data packets

c)

A type of transmission media that provides the greatest bandwidth

d)

A server within a network

105.

Which transmission media is capable of having a much higher bandwidth?

a)

Coaxial

b)

Twisted pair cable

c)

Plastic

d)

Fibre optic

106.

Which type of transmission media is the least expensive to manufacture?

a)

Coaxial

b)

Twisted pair cable

c)

Plastic

d)

Fibre optic

107.

Which of these components is internal to a computer and is required to connect the computer to a network?

a)

Wireless Access Point

b)

Network Interface card

c)

Switch

d)

Hub

108.

What is meant by latency in the performance of a network?

a)

The amount of time data takes to travel from the source to the destination

b)

The maximum rate that data can be transferred at

c)

The number of errors that are found in a data packet after transmission

d)

The route a packet takes when it is being transmitted

109.

Which if these terms refers to the maximum rate at which data can be transferred?

a)

Error detection

b)

Packet switching

c)

Bandwidth

d)

Transmission media

110.
A peer to peer network always has a central server
a)
False
b)
True
111.
In a client server network, all clients are equally powerful.
a)
False
b)
True
112.
A peer to peer network is a network arrangement where all of the computers are equal.
a)
True
b)
False
113.
Which one of these items is not an advantage of a client-server network?
a)
No central point of failure
b)
Central control of security
c)
Easier to supervise network performance
d)
Easier to perform software upgrades
114.
Which one of these items is true of a peer-to-peer network?
a)
No network wide security in place
b)
Central control of security
c)
Has a central point of failure
d)
Easier to perform network wide backups
115.
A client-server network allows people to save their data centrally.
a)
True
b)
False
116.

a secret password for unlocking a message

a)

caeser cipher

b)

key

c)

decryption

d)

encryption

117.

If Internet connection speed is 64 Kbps (kilobits per second).

How many bits per second could that transfer?

a)

640 bits per second

b)

64,000 bits per second

c)

640,000 bits per second

d)

6,400 bits per second

118.

Uses radio signal to send bits from one place to another

a)

Ethernet Cable

b)

Wireless

c)

Fiber Optic

d)

Arpanet

119.

Choose security protocols

a)

DNS

b)

SSL

c)

IPV4

d)

TLS

e)

IPv6

120.

How many paths are there from the router in Utah to the router in UCLA?

a)

4

b)

3

c)

2

d)

1

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