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WorksheetsCommunications and Networks EOU Test
Total questions: 72
Worksheet time: 36mins
Name
Class
Date
1.
What is a symbol in communication?
a)
A range of frequencies
b)
A type of device
c)
A set of rules
d)
A type of signal
2.
What is Baud rate?
a)
The difference in time between an action being initiated and its effect being noticed
b)
The number of bits transmitted per second
c)
The range of frequencies a medium can transmit
d)
The number of signal changes in the medium per second
3.
What is the relationship between bit rate and bandwidth?
a)
Bandwidth and bit rate are inversely related
b)
Bandwidth and bit rate are not related
c)
Higher bit rate results in a higher bandwidth
d)
Higher bandwidth results in a higher bit rate
4.
What is latency?
a)
The range of frequencies a medium can transmit
b)
The difference in time between an action being initiated and its effect being noticed
c)
The number of bits transmitted over the medium per second
d)
The number of signal changes in the medium per second
5.
What is a protocol?
a)
A type of signal
b)
A range of frequencies
c)
A type of device
d)
A set of rules relating to communication between devices
6.
What is serial data transmission?
a)
Data is sent one bit at a time over multiple communication lines
b)
Data is sent multiple bits at a time over one communication line
c)
Data is sent one bit at a time over one communication line
d)
Data is sent multiple bits at a time over multiple communication lines
7.
What is parallel data transmission?
a)
Sends data one bit at a time over one communication line
b)
Sends data one bit at a time over multiple communication lines
c)
Uses numerous parallel communication lines to send multiple bits between components in a computer simultaneously
d)
Sends data multiple bits at a time over one communication line
8.
What is skew?
a)
The leaking of signals from one communication line to another
b)
The use of multiple communication lines
c)
The overlapping of bits from different pulses
d)
The time difference between one bit being transferred and another
9.
What is crosstalk?
a)
The time difference between one bit being transferred and another
b)
The use of multiple communication lines
c)
Signals from one communication line can 'leak' into another
d)
The overlapping of bits from different pulses
10.
What is bit rate?
a)
The range of frequencies a medium can transmit
b)
The number of signal changes in the medium per second
c)
The number of bits transmitted over the medium per second
d)
The difference in time between an action being initiated and its effect being noticed
11.
What is the difference between synchronous and asynchronous data transmission?
a)
Asynchronous data transmission sends data one bit at a time over one communication line, while synchronous data transmission sends data multiple bits at a time over multiple communication lines
b)
Synchronous data transmission sends data one bit at a time over one communication line, while asynchronous data transmission sends data multiple bits at a time over multiple communication lines
c)
Synchronous data transmission sends data in a continuous stream at a fixed rate, while asynchronous data transmission sends data one bit at a time over one communication line
d)
Asynchronous data transmission sends data in a continuous stream at a fixed rate, while synchronous data transmission sends data one bit at a time over one communication line
12.
What is the formula for Baud rate?
a)
№ of bits per signal × Bit rate
b)
Bit rate - № of bits per signal
c)
Bit rate × № of bits per signal
d)
Bit rate / № of bits per signal
13.
What is the relationship between Baud rate and bit rate if there is more than one bit sent per signal?
a)
Bit rate and Baud rate are equal
b)
There is no relationship between Baud rate and bit rate if there is more than one bit sent per signal
c)
Bit rate is higher than Baud rate
d)
Baud rate is higher than bit rate
14.
What is the relationship between Baud rate and bit rate if there is only one bit sent per signal?
a)
There is no relationship between Baud rate and bit rate if there is only one bit sent per signal
b)
Baud rate and bit rate are equal
c)
Baud rate is higher than bit rate
d)
Bit rate is higher than Baud rate
15.
What is topology?
a)
The size of a network
b)
The color of a network
c)
The structure of a network
d)
The speed of a network
16.
What are the two types of topology?
a)
Big and small
b)
Physical and logical
c)
Fast and slow
d)
Red and blue
17.
What are the two types of physical network topology?
a)
Circle and square
b)
Star and bus
c)
Triangle and rectangle
d)
Oval and hexagon
18.
In a physical star network, how are packets delivered to their recipient?
a)
To the central hub only
b)
To all clients on the network
c)
Through a shared backbone
d)
Directly over a cable connected only to the recipient
19.
In a physical bus network, how are clients connected to the network?
a)
To a single cable called a backbone
b)
To a shared backbone
c)
To a central hub
d)
To a direct connection to the server
20.
What happens if the central hub fails in a physical star network?
a)
Only the clients connected to the hub are affected
b)
All communication over the network is stopped
c)
The network continues to function normally
d)
The server takes over as the central hub
21.
What is an advantage of physical star network topology?
a)
Packets are sent through the shared backbone, allowing every client on the network to see packets that aren’t intended for them
b)
Each cable has just one device communicating over it, eliminating the possibility of collisions
c)
There is no central hub, reducing the chances of a network failure and decreasing the cost of installation
d)
Inexpensive to install as a minimum length of cable is required
22.
What is a disadvantage of physical star network topology?
a)
Expensive to install thanks to the amount of cable required
b)
Should the backbone fail, the entire network becomes unusable
c)
The backbone is used for communication by multiple clients, introducing the risk of collisions
d)
Packets are sent through the shared backbone, allowing every client on the network to see packets that aren’t intended for them
23.
What is an advantage of physical bus topology?
a)
Packets are sent directly to their recipient, over a cable that is connected only to the recipient
b)
Each cable has just one device communicating over it, eliminating the possibility of collisions
c)
Inexpensive to install as a minimum length of cable is required
d)
There is no central hub, reducing the chances of a network failure and decreasing the cost of installation
24.
What is a disadvantage of physical bus topology?
a)
Other clients on the network cannot see packets that aren’t intended for them
b)
The backbone is used for communication by multiple clients, introducing the risk of collisions
c)
Should the central hub fail, all communication over the network is stopped
d)
Each cable has just one device communicating over it, eliminating the possibility of collisions
25.
What does a network's logical topology refer to?
a)
The type of cable used in the network
b)
The type of network protocol used
c)
The flow of data packets within a network
d)
The actual architecture of a network
26.
What is the difference between a logical bus network and a logical star network?
a)
A logical bus network is faster than a logical star network
b)
A logical bus network uses a central hub whereas a logical star network does not
c)
A logical bus network delivers packets to all clients on the network whereas a logical star network delivers packets only to their recipient
d)
A logical bus network delivers packets only to their recipient whereas a logical star network delivers packets to all clients on the network
27.
How can a physical star network behave as a logical bus?
a)
By using a shared backbone
b)
By running a bus protocol on the hub
c)
By connecting all clients to the backbone
d)
By using a central server
28.
What is client-server networking?
a)
One or more central servers provide services to the clients on the network
b)
Clients are connected to the network in the same way as servers
c)
Services are provided by the clients themselves
d)
All clients on the network provide services to each other
29.
What is an advantage of client-server networking?
a)
Improves security
b)
Services are provided by the clients themselves
c)
Is easier to set up and manage
d)
Does not require a central server
30.
What is a disadvantage of client-server networking?
a)
Clients are not connected to the network in the same way as servers
b)
Requires a fair degree of expertise to set up and manage
c)
Services are provided by the clients themselves
d)
Is more expensive than peer-to-peer networking
31.
What is peer-to-peer networking?
a)
One or more central servers provide services to the clients on the network
b)
Clients are connected to the network in the same way as servers
c)
Services are provided by the clients themselves
d)
All clients on the network provide services to each other
32.
What is an advantage of peer-to-peer networking?
a)
Improves security
b)
Clients are not connected to the network in the same way as servers
c)
Does not require a central server
d)
Is easier to set up and manage
33.
What is a disadvantage of peer-to-peer networking?
a)
Is more expensive than client-server networking
b)
Security can be an issue
c)
Services are provided by the clients themselves
d)
Clients are connected to the network in the same way as servers
34.
What is topology?
a)
The size of a network
b)
The structure of a network
c)
The color of a network
d)
The speed of a network
35.
What are the two types of topology?
a)
Red and blue
b)
Big and small
c)
Physical and logical
d)
Fast and slow
36.
What are the two types of physical network topology?
a)
Star and bus
b)
Oval and hexagon
c)
Triangle and rectangle
d)
Circle and square
37.
What is a physical star network?
a)
Clients are connected to a single cable called a backbone
b)
Each client has its own direct connection to the central hub
c)
Clients are connected in a circle
d)
Clients are connected in a line
38.
What is a physical bus network?
a)
Clients are connected to a single cable called a backbone
b)
Clients are connected in a circle
c)
Each client has its own direct connection to the central hub
d)
Clients are connected in a line
39.
What is an advantage of physical star network topology?
a)
Packets are sent directly to their recipient
b)
Inexpensive to install
c)
No central hub required
d)
Shared backbone for communication
40.
What is a disadvantage of physical star network topology?
a)
Should the central hub fail, all communication over the network is stopped
b)
The failure of one cable does not affect the performance of the rest of the network
c)
Each cable has just one device communicating over it, eliminating the possibility of collisions
d)
Packets are sent through the shared backbone, allowing every client on the network to see packets that aren’t intended for them
41.
What is an advantage of physical bus network topology?
a)
No central hub required
b)
Inexpensive to install as a minimum length of cable is required
c)
Packets are sent directly to their recipient
d)
Each cable has just one device communicating over it, eliminating the possibility of collisions
42.
What is a disadvantage of physical bus network topology?
a)
Should the central hub fail, all communication over the network is stopped
b)
Packets are sent directly to their recipient
c)
Each cable has just one device communicating over it, eliminating the possibility of collisions
d)
The backbone is used for communication by multiple clients, introducing the risk of collisions
43.
What is logical network topology?
a)
The actual architecture of a network
b)
The speed of a network
c)
The flow of data packets within a network
d)
The structure of a network
44.
Can a physical star network behave as a logical bus?
a)
Sometimes
b)
It depends
c)
No
d)
Yes
45.
What is a logical bus network?
a)
Delivers packets only to their recipient
b)
Has a central hub
c)
Delivers packets to all clients on the network
d)
Connects clients to a single cable called a backbone
46.
What is a logical star network?
a)
Has a central hub
b)
Delivers packets to all clients on the network
c)
Delivers packets only to their recipient
d)
Connects clients to a single cable called a backbone
47.
What is a client?
a)
A device on a network that requests services
b)
A type of cable
c)
A device on a network that provides services
d)
A type of topology
48.
What is client-server networking?
a)
Clients are connected to a single cable called a backbone
b)
Services are provided by the clients themselves
c)
Each client has its own direct connection to the central hub
d)
One or more central servers provide services to the clients on the network
49.
What is peer-to-peer networking?
a)
Services are provided by the clients themselves
b)
One or more central servers provide services to the clients on the network
c)
Each client has its own direct connection to the central hub
d)
Clients are connected to a single cable called a backbone
50.
What is a server?
a)
A type of topology
b)
A type of cable
c)
A device on a network that requests services
d)
A device on a network that provides services
51.
What is a disadvantage of client-server networking?
a)
Services are provided by the clients themselves
b)
Requires a fair degree of expertise to set up and manage
c)
Inexpensive to install
d)
No central hub required
52.
What is an advantage of client-server networking?
a)
No central hub required
b)
Inexpensive to install
c)
Services are provided by the clients themselves
d)
Improves security
53.
What is the purpose of WPA?
a)
To encrypt transmitted data
b)
To block specific devices from connecting to a network
c)
To disable SSID broadcast
d)
To allow only specific devices to connect to a network
54.
What is MAC?
a)
A type of encryption
b)
A type of wireless network adapter
c)
A type of wired network
d)
A media access control address
55.
What is an advantage of peer-to-peer networking?
a)
Improves security
b)
Services are provided by the clients themselves
c)
No central server required
d)
Inexpensive to install
56.
What is a disadvantage of peer-to-peer networking?
a)
Inexpensive to install
b)
Improves security
c)
No central hub required
d)
Security can be an issue
57.
What is required for a device to connect to a wireless network?
a)
A wired network
b)
A wired network adapter
c)
A wireless access point
d)
A wireless network adapter
58.
What is WiFi?
a)
A wired local area network
b)
A wireless wide area network
c)
A wireless local area network
d)
A wired wide area network
59.
What is WPA?
a)
A type of wired network
b)
A wireless network adapter
c)
A method of securing a wireless network
d)
A type of wireless access point
60.
What is a hidden node?
a)
A device that is not compatible with a wireless network
b)
A device that is not authorized to connect to a wireless network
c)
A device that cannot connect to a wireless network
d)
A device that cannot “see” some parts of the network on which communication may be occurring
61.
What is SSID?
a)
A type of wireless network adapter
b)
A type of wired network
c)
A name that identifies a wireless network
d)
A type of encryption
62.
What is CSMA/CA?
a)
A type of wireless access point
b)
A protocol used in wireless networks
c)
A type of encryption
d)
A protocol used in wired networks
63.
What does CSMA/CA do?
a)
Avoids data collisions caused by multiple devices communicating simultaneously
b)
Encrypts transmitted data
c)
Creates MAC address filters
d)
Disables SSID broadcast
64.
What is RTS/CTS?
a)
A protocol used to secure a wireless network
b)
A protocol used to address the issue of hidden nodes
c)
A protocol used to disable SSID broadcast
d)
A protocol used to avoid data collisions caused by multiple devices communicating simultaneously
65.
What is the first step in the CSMA/CA process?
a)
The transmitting device sends a “request to send” message to the server
b)
The transmitting device begins communication with the server
c)
The transmitting device checks whether the channel is idle
d)
The server sends a “clear to send” message to the transmitting device
66.
What is the purpose of the exponential backoff algorithm in the CSMA/CA process?
a)
To encrypt transmitted data
b)
To decrease the time period for which the device waits with each check of the channel
c)
To disable SSID broadcast
d)
To increase the time period for which the device waits with each check of the channel
67.
What is the purpose of a wireless access point?
a)
To connect to a wired network
b)
To disable SSID broadcast
c)
To connect to a wireless network
d)
To encrypt transmitted data
68.
What is the purpose of the “request to send” message in the RTS/CTS protocol?
a)
To check whether the channel is idle
b)
To encrypt transmitted data
c)
To avoid data collisions caused by multiple devices communicating simultaneously
d)
To address the issue of hidden nodes
69.
What happens if no “clear to send” message is received in the RTS/CTS protocol?
a)
The server sends a “clear to send” message to the transmitting device
b)
The transmitting device checks whether the channel is idle
c)
The transmitting device sends a “request to send” message to the server
d)
The transmitting device must wait before starting the CSMA process again
70.
What is the purpose of a MAC address whitelist?
a)
To disable SSID broadcast
b)
To encrypt transmitted data
c)
To block specific devices from connecting to a network
d)
To allow only specific devices to connect to a network
71.
What is the purpose of a MAC address blacklist?
a)
To allow only specific devices to connect to a network
b)
To encrypt transmitted data
c)
To block specific devices from connecting to a network
d)
To disable SSID broadcast
72.
What is the purpose of disabling SSID broadcast?
a)
To encrypt transmitted data
b)
To hide the fact that a wireless network is available
c)
To block specific devices from connecting to a network
d)
To allow only specific devices to connect to a network
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