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WorksheetsPage 1
Total questions: 70
Worksheet time: 35mins
The full form of the term modem is
Modulator Demodulator
Module Demolition
Modern Emulator
Modular Demonstrator
Which set correctly lists the three types of data communication based on direction?
Simplex, Half Duplex, Full Duplex
Serial, Parallel, Asynchronous
TCP, UDP, ICMP
Peer-to-Peer, Client-Server, Mesh
The device used to connect two networks across different segments is called a
Router
Hub
Switch
Repeater
Which statement best describes the difference between hardware and software?
Hardware is the physical equipment; software is the set of programs that make hardware work
Hardware is code stored in memory; software is the casing and ports
Hardware and software are both tangible components of a computer
Hardware refers only to input devices; software refers only to output devices
A device that forwards data between computers within a single local network is called a
Switch
Router
Firewall
Modem
The IP address 126.46.5.6 belongs to which address class?
Class B
Class A
Class C
Class D
The design scheme for building a computer network is known as
Topology
Protocol
Bandwidth
Latency
How many layers are in the OSI model?
7
5
6
4
Select all hardware devices used to physically join network cables.
Hub
Switch
Router
Access Point
Which group lists input devices?
Keyboard, Mouse, Scanner, Microphone
Monitor, Printer, Speaker, Projector
CPU, RAM, SSD, GPU
Switch, Router, Firewall, Repeater
Define a computer network.
A group of computers linked to share data and resources
A single computer running multiple programs
A device that stores power for computers
The physical workspace where computers are placed
Which type of network covers a single building or school?
LAN
MAN
WAN
PAN
What is the largest network that spans the entire world?
Internet
Intranet
Extranet
LAN
Which device connects a computer to a network?
NIC
UPS
CPU
HDMI adapter
UTP cable is classified as which type of transmission media?
Guided
Unguided
Radio frequency
Satellite link
Which network topology uses a hub or switch as the central connection point?
Star
Bus
Ring
Mesh
Which protocol is used for sending email?
SMTP
FTP
HTTP
SNMP
What is the primary function of DNS?
Translate domain names or URLs into IP addresses
Encrypt emails end-to-end
Assign MAC addresses to devices
Manage physical cabling layouts
What is the first-octet range for Class C IPv4 addresses?
192–223
128–191
224–239
1–126
Which device is used to share an internet connection with many users?
Router
Monitor
Printer
Keyboard
The advantage of fiber optic compared to UTP is
More resistant to interference and faster
Cheaper and easier to crimp
Uses only electrical signals
Requires no shielding
Wi‑Fi technology is categorized as
Wireless network
Wired LAN
Powerline network
Token Ring network
The network security system that blocks illegal external access is called
Firewall
Router
Proxy
Switch
The device used to strengthen a signal so the range is farther is
Repeater
Modem
Hub
Bridge
A very short‑range personal network, such as between a phone and a laptop, is called
PAN
LAN
MAN
WAN
The unique address assigned to each device on a network is called
IP address
SSID
MAC vendor code
Subnet mask
The action of splitting a large network into smaller parts for efficiency is called
Subnetting
Multiplexing
Tunneling
Encapsulation
HTTP is used to access
Web pages/websites
Email services
File transfer (FTP) services
DNS resolution services
Data transfer speed is measured in units of
Mbps
Volts
Kilograms
Watts
A VPN is used to create a network connection that is
Secure/private
Broadcast to all devices
Lossy for data
Unfiltered and open
Explain the difference between LAN and WAN. Choose the correct statement about their coverage areas.
LAN covers a small area like a building or school, while WAN spans very large areas such as countries or the world.
LAN spans countries or the world, while WAN is limited to a single room.
Both LAN and WAN only cover a single building.
LAN and WAN are identical in geographic scope.
Why is network security needed? Select all that apply.
To prevent data theft.
To block illegal access.
To protect against malware.
To maintain confidentiality and integrity of information.
To guarantee faster internet speed regardless of network conditions.
Which of the following are network devices? Select all that apply.
Router
Switch
Modem
Bridge
Access point
Which are typical weaknesses of wireless networks? Select all that apply.
Prone to interference.
Speeds can fluctuate.
Requires physical cables for every device.
Vulnerable to eavesdropping if security is weak.
Immune to malware by design.
Why is a switch more efficient than a hub? Choose the best explanation.
A switch forwards frames only to the intended destination port, reducing unnecessary traffic and collisions.
A switch broadcasts frames to all ports just like a hub.
A switch uses coaxial cables so it is faster.
A switch disables collision detection on the network.
A computer is connected to Wi‑Fi but cannot access the internet. Other devices work normally. What is the most likely problem on that computer?
Incorrect IP configuration or the adapter/DHCP did not obtain an address.
The ISP is down.
The router is powered off.
The router’s DNS servers are failing, affecting all devices.
A school network becomes slow when many students are streaming online. Which solutions are most appropriate? Select all that apply.
Implement bandwidth management (traffic shaping or QoS).
Upgrade the connection speed.
Replace all switches with hubs.
Change the Wi‑Fi SSID name.
An office LAN is completely down. Router indicator lights are normal, but the switch lights are off. What is the most likely cause?
The switch is faulty or not receiving power.
Router misconfiguration.
An ISP outage.
Antivirus software blocking traffic.
A user wants to securely access a file server from out of town. Which technology is most appropriate?
VPN
Unencrypted port forwarding
Anonymous FTP
Remote desktop without security controls
An employee accessed Wi‑Fi without permission using a leaked password. What are the best actions to take? Select all that apply.
Change the Wi‑Fi password.
Implement WPA2/WPA3 encryption.
Hide the SSID.
Rely only on MAC address filtering.
The purpose of the OSI is to help with what in data communication?
Helping designers understand the functions of each layer related to data communication flow
Providing hardware specifications for all network devices
Encrypting all traffic across a network by default
Assigning IP addresses to every host automatically
Which of the following is used for data communication?
Satellite
Scanner
Joystick
Plotter
Which OSI layer is used for the routing process?
Physical layer
Data Link layer
Network layer
Presentation layer
The OSI standard for data communication was created by which organization?
ISO
IEEE
IETF
ITU
The rules or standard that allow connection, communication, and data transfer between two or more computer points are called what?
Protocol
Topology
Bandwidth
Firmware
Which device uses a full-duplex transmission system?
Telephone
Walkie-talkie
Broadcast radio
Loudspeaker
The process of sending and receiving data between two devices connected in one network is the definition of what?
Data communication
Routing
Modulation
Virtualization
Broadcast radio is included in which type of communication?
Voice communication
Video communication
Image communication
Text communication
Which of the following is not included as a transmission system?
Simplex
Half-duplex
Full-duplex
Duplex
Which of the following is a type of data in the form of video?
CD or DVD
Text
Still image
Audio
What is the full form of LAN?
Local Area Network
Wide Area Network
Local Access Node
Logical Area Network
The network topology shaped like a ring is called what?
Star topology
Bus topology
Ring topology
Mesh topology
Which device functions to connect two different networks?
Router
Switch
Hub
Repeater
The physical address on a network device is called what?
IP address
MAC address
Subnet mask
Gateway address
How many bits are in IPv4?
16 bits
32 bits
64 bits
128 bits
Which protocol is used to send email?
HTTP
FTP
SMTP
SNMP
What is the full form of DHCP?
Domain Host Control Protocol
Dynamic Host Configuration Protocol
Data Handling Control Protocol
Distributed Host Communication Protocol
Which device splits network signals across many ports?
Router
Switch
Modem
Bridge
The device used to extend the coverage of a Wi‑Fi signal is called what?
Access Point
Router
Repeater
Modem
Which command checks network connectivity using ICMP?
ping
tracert
ipconfig
nslookup
Which protocol is used for file transfer on port 21?
FTP
HTTP
SSH
SMTP
What is the address range used by APIPA (Automatic Private IP Addressing)?
169.254.0.0/16
192.168.0.0/16
10.0.0.0/8
172.16.0.0/12
Which IP class has leading bits 110?
Class A
Class B
Class C
Class D
What is the standard speed of Fast Ethernet?
10 Mbps
100 Mbps
1 Gbps
10 Gbps
What is the standard speed of Fast Ethernet?
10 Mbps
100 Mbps
1 Gbps
10 Gbps
What does QoS stand for?
Quality of Service
Queue of Signals
Quantity of Storage
Quantum of Security
The IP address 192.168.1.1 belongs to which type?
Private IP
Public IP
Loopback IP
Multicast IP
Which protocol is used to encrypt web communications?
HTTP
HTTPS
FTP
Telnet
Which technology enables multiple VLANs on a single trunk port?
IEEE 802.1Q
IEEE 802.3
STP
OSPF
Which protocol translates domain names to IP addresses?
DHCP
DNS
SNMP
NTP
