Worksheetsfiunal
Total questions: 70
Worksheet time: 35mins
Name
Class
Date
1.
What best defines a computer network?
a)
A group of computers in the same room
b)
A system of interconnected devices that exchange data and share protocols
c)
A system that only uses the internet
d)
A collection of software programs
2.
Which of the following is NOT a key feature of a network?
a)
Collection of devices
b)
Devices are connected
c)
Devices can share data
d)
Devices must be wireless only
3.
Which statement about data transmission is correct?
a)
It refers to storing data
b)
It is the movement of data between digital devices
c)
It only happens on the internet
d)
It requires fiber-optic cables
4.
How many numbers are in an IPv4 address?
a)
2
b)
3
c)
4
d)
5
5.
What separates the numbers in an IP address?
a)
A comma
b)
A slash
c)
A full stop
d)
A dash
6.
Which of the following is a valid IP address?
a)
300.168.1.1
b)
192.168.1.2
c)
192.168.1
d)
192-168-1-2
7.
What is the range of each number in an IP address?
a)
0–100
b)
0–200
c)
1–255
d)
0–255
8.
Which network type is the smallest in geographical scope?
a)
LAN
b)
WAN
c)
PAN
d)
MAN
9.
PANs are most commonly connected using:
a)
Ethernet
b)
Wi-Fi
c)
Bluetooth
d)
Fiber optics
10.
Which device is MOST likely to be part of a PAN?
a)
School server
b)
Smartwatch
c)
Web server
d)
Office printer
11.
A LAN usually covers:
a)
A single building or site
b)
A whole country
c)
The entire internet
d)
Multiple continents
12.
Which is an example of a LAN?
a)
The internet
b)
A school network
c)
Bluetooth headphones
d)
A satellite network
13.
LANs usually access the internet through a:
a)
Switch
b)
Modem
c)
Router
d)
NIC
14.
What is the largest example of a WAN?
a)
A school network
b)
A home network
c)
The internet
d)
Bluetooth network
15.
WANs are usually made up of:
a)
PANs only
b)
Several LANs connected together
c)
One large computer
d)
Wireless devices only
16.
What is a server?
a)
A weak computer for browsing
b)
A computer that offers services to other devices
c)
A client device
d)
A personal laptop
17.
Which server stores files for network users?
a)
Mail server
b)
Web server
c)
File server
d)
Printer server
18.
Which server manages shared printers?
a)
Web server
b)
Printer server
c)
Mail server
d)
File server
19.
Which server allows users to send and receive emails?
a)
Web server
b)
File server
c)
Printer server
d)
Mail server
20.
Web servers mainly:
a)
Store emails
b)
Share printers
c)
Transmit files over the WWW
d)
Encrypt data
21.
What is a client?
a)
A computer providing services
b)
A device requesting services from a server
c)
A router
d)
A switch
22.
What component allows a device to communicate on a network?
a)
Router
b)
Switch
c)
NIC (Network Interface Card)
d)
Server
23.
What type of cable sends data as electrical pulses?
a)
Fiber-optic
b)
Copper cable
c)
Wireless
d)
Coaxial
24.
Fiber-optic cables transmit data as:
a)
Sound waves
b)
Electrical pulses
c)
Radio waves
d)
Pulses of light
25.
Which cable is faster and suitable for long distances?
a)
Copper
b)
Ethernet
c)
Fiber-optic
d)
Twisted pair
26.
What does a switch store to direct data?
a)
IP address
b)
MAC address
c)
Password
d)
Username
27.
Which device connects different networks together?
a)
Switch
b)
NIC
c)
Router
d)
Server
28.
A router’s main role is to:
a)
Store files
b)
Find the fastest route for data
c)
Encrypt data
d)
Detect viruses
29.
Wired networks use:
a)
Radio waves
b)
Bluetooth
c)
Cables
d)
Satellites
30.
A key advantage of wired networks is:
a)
Portability
b)
Low cost
c)
Speed
d)
No cables
31.
A key disadvantage of wired networks is:
a)
Interference
b)
Expensive installation
c)
Low security
d)
Slow speed
32.
Wireless networks are MOST likely to suffer from:
a)
Cable damage
b)
Interference
c)
No connectivity
d)
Hardware failure only
33.
Why are wireless networks less secure?
a)
They are slower
b)
Data can be intercepted easily
c)
They use cables
d)
They require servers
34.
What is serial data transmission?
a)
Many bits sent at once
b)
One bit at a time over one channel
c)
Wireless transmission
d)
Parallel transmission
35.
Serial transmission is best for:
a)
Short distances
b)
Long distances
c)
High interference areas
d)
Parallel systems
36.
Parallel transmission sends:
a)
One bit at a time
b)
Data wirelessly
c)
Several bits simultaneously
d)
Data as light pulses
37.
Why is parallel transmission unsuitable for long distances?
a)
Too slow
b)
High cost
c)
Data skew can occur
d)
Requires servers
38.
A bit flip is:
a)
A lost packet
b)
A change from 0 to 1 or 1 to 0
c)
Encryption
d)
Compression
39.
Which of the following can cause transmission errors?
a)
Network congestion
b)
Power surge
c)
Device failure
d)
All of the above
40.
Echo checking works by:
a)
Encrypting data
b)
Sending data twice
c)
Sending a copy back to the sender
d)
Using parity bits
41.
What happens if echoed data matches the original?
a)
Error occurred
b)
Transmission failed
c)
Data is correct
d)
Data is deleted
42.
A disadvantage of echo checking is:
a)
No error detection
b)
Cannot locate where the error occurred
c)
Too fast
d)
No extra data sent
43.
Cybercrime refers to:
a)
Physical theft
b)
Crimes using computers or the internet
c)
Hardware failure
d)
Legal software use
44.
Identity theft involves:
a)
Stealing hardware
b)
Pretending to be someone else using stolen identity
c)
Sending spam
d)
Encrypting data
45.
Phishing usually involves:
a)
Guessing passwords
b)
Fake websites posing as real ones
c)
Installing spyware
d)
Blocking networks
46.
A brute-force attack attempts to:
a)
Spy on users
b)
Guess passwords repeatedly
c)
Encrypt files
d)
Steal hardware
47.
Malware is:
a)
Hardware damage
b)
Software installed to cause harm or steal data
c)
A firewall
d)
An OS
48.
Which malware spreads by infecting files?
a)
Spyware
b)
Ransomware
c)
Virus
d)
Trojan
49.
Which malware encrypts data and demands payment?
a)
Virus
b)
Spyware
c)
Ransomware
d)
Worm
50.
Spyware’s main purpose is to:
a)
Destroy files
b)
Encrypt data
c)
Monitor user activity secretly
d)
Display ads only
51.
Who is responsible for network maintenance and security?
a)
Client
b)
Server
c)
Network administrator
d)
Hacker
52.
Which OS interface uses typed commands?
a)
GUI
b)
CLI
c)
Speech interface
d)
Touch interface
53.
Which interface uses icons and menus?
a)
CLI
b)
GUI
c)
Natural language
d)
BIOS
54.
Smart speakers mainly use:
a)
GUI
b)
CLI
c)
Natural language and speech interface
d)
Batch interface
55.
A Network Operating System (NOS) is usually installed on:
a)
Client devices
b)
Printers
c)
Servers only
d)
Routers
56.
Which is NOT a function of a NOS?
a)
Account management
b)
Network security tools
c)
Playing games
d)
Installing software on clients
57.
What is a driver?
a)
Hardware component
b)
Network cable
c)
Software that allows OS to communicate with hardware
d)
Malware
58.
Without drivers, a device will:
a)
Work faster
b)
Not communicate properly with the OS
c)
Become a server
d)
Be secure
59.
Which combination is correct?
a)
PAN – Internet
b)
LAN – School network
c)
WAN – Bluetooth
d)
PAN – Country network
60.
Which scenario BEST describes a client-server model?
a)
Two phones using Bluetooth
b)
A laptop accessing files stored on a file server
c)
A printer printing locally
d)
A USB file transfer
61.
In most LANs, data is transmitted in the form of:
a)
Files
b)
Streams
c)
Packets
d)
Signals
62.
Which protocol is commonly used for sending packets of data on a LAN?
a)
HTTP
b)
FTP
c)
TCP/IP
d)
SMTP
63.
TCP/IP is best described as:
a)
A type of cable
b)
A network protocol suite used to transmit data
c)
A hardware device
d)
An operating system
64.
Why are packets used instead of sending data as one whole file?
a)
To reduce storage
b)
To improve security only
c)
To allow efficient routing and error handling
d)
To avoid using routers
65.
Ethernet networks are primarily associated with:
a)
PANs
b)
LANs
c)
WANs
d)
Wireless networks
66.
Which statement best defines a wired (Ethernet) network?
a)
Devices connected using radio waves
b)
Devices connected using Bluetooth
c)
Devices connected using Ethernet cables
d)
Devices connected only through servers
67.
A switch stores which information to correctly forward data?
a)
IP address
b)
Username
c)
MAC address
d)
Port number
68.
The MAC address stored by a switch is used to:
a)
Identify websites
b)
Identify devices on the local network
c)
Encrypt data
d)
Assign IP addresses
69.
Which of the following best explains why only one wire/channel in serial transmission stays synchronized over long distances?
a)
Fewer bits are sent
b)
Less interference between channels
c)
Higher bandwidth
d)
Faster transmission speed
70.
Why does echo checking increase network traffic?
a)
Data is encrypted
b)
Data is compressed
c)
Data is sent twice (forward and back)
d)
Data is split into packets
100 %
