WorksheetsComputer Networks
Total questions: 67
Worksheet time: 1hrs 9mins
Which term refers to the devices connected together in a computer network?
Links between routers
Media connectors
Nodes on the network
Protocols in use
Fill in the blank: The devices on a computer network are called (a) .
Which statement best describes the main purpose of a computer network?
To isolate devices from each other
To allow devices to communicate and share
To eliminate the need for receivers
To replace all hardware with software
Identify a realistic disadvantage of computer networks.
Guaranteed zero downtime
Free setup and maintenance
Vulnerability to viruses and data theft
Automatic entertainment features
Which option correctly pairs a component with its function?
Transmission protocol — rules used by both parties
Transmission media — device that accepts data
Receiver — sends information outward
Message — rules for communication
A user streams a movie and shops online using the same laptop. Which network benefit is illustrated?
Preventing all data downtime
Replacing hardware devices
Guaranteed free maintenance
Entertainment and business use
Explain why a network still needs both a sender and a receiver even though devices can share hardware and software. Provide a concise reasoning.
Which classification focuses on the physical scope a network covers, such as a building, city, or across countries?
Portability category
Level of privacy category
Geographical area category
Transmission media category
Fill in the blank: A (a) connects devices within a limited area like a school lab, while a WAN spans large regions across countries.
A company needs a network accessible to employees only, with some selected partners getting limited access from outside. Which combination best matches this need?
Use Wireless cloud exclusively
Use Intranet only everywhere
Use Extranet for partners
Use Internet for all access
You must recommend a network setup for mobile field staff sending data from tablets. Choose the most appropriate classification emphasis and justify briefly.
Which network type best fits a single building with connected computers and printers?
LAN within one building
MAN across one campus
WAN spanning multiple countries
PAN for nearby smartphones
Fill in the blank: (a) connects devices, mainframes, and multiple LANs within a single metropolitan location such as a hospital or university campus.
Which statement correctly distinguishes ownership among LAN, MAN, and WAN?
LAN public, MAN private, WAN private
LAN private, MAN public, WAN private
LAN private, MAN private, WAN public
LAN public, MAN public, WAN public
A city government wants to link several district offices and local campuses across the entire city. Which network classification is most appropriate?
LAN inside one office
WAN between two rooms
VPN for single user
MAN across one city
Compare the typical geographical scope of LAN, MAN, and WAN.
Which example best represents a WAN?
Internet connecting global sites
University campus backbone
Home Bluetooth devices
Office Wi‑Fi network
You are tasked with connecting two labs on different floors of the same building. Choose the most suitable network type and justify briefly.
Which network type is publicly accessible and connects worldwide computer networks using IP?
Internet
Extranet
Intranet
Enterprise LAN
Fill in the blank: An intranet is a (a) network contained within an enterprise for sharing company information among employees.
Which statement best distinguishes an internet from an intranet regarding user scope?
Only IP protocol vs only proprietary protocol
Only text sharing vs only video sharing
Unlimited global users vs limited internal users
Limited internal users vs unlimited global users
Select the most appropriate use case for an extranet.
Secure sharing with trusted partners
Internal memo among employees
Public discussion forums worldwide
Personal home Wi‑Fi sharing
Which data forms can be sent and received via the Internet as described?
Only text and graphics
Text, graphics, video, voice, programs
Only executable programs
Only video and voice
Explain how an enterprise could use an intranet and an extranet together to improve collaboration while maintaining privacy.
A company wants vendors to access purchase orders but block the public. Which network type should they extend?
Peer‑to‑peer
Intranet
Internet
Extranet
Reason through which network you would use to distribute a school’s internal timetable to teachers only, and justify why other options are less suitable.
Which statement best describes an extranet in a business context?
An internal-only network restricted to employees
A global public network open to all users worldwide
A peer-to-peer network for home media sharing
A private network extending selected access to outsiders
Fill in the blank: An extranet uses (a) technology to securely share part of a company’s information with external parties.
Compare network scopes: Which option correctly matches each network to its typical scope?
Internet: partners; Intranet: public; Extranet: campus only
Internet: inside; Intranet: global; Extranet: home use
Internet: global; Intranet: inside; Extranet: outside links
Internet: private; Intranet: vendors; Extranet: worldwide
A company wants to share order status with suppliers while keeping internal HR data private. Which network setup is most appropriate?
Replace all networks with a single peer-to-peer system
Use only the intranet and email suppliers occasionally
Publish everything on the public internet for transparency
Create an extranet for suppliers and keep HR on the intranet
Which statement best defines transmission media in computer networks?
The hardware used to process application data
The rules that govern network protocols
The pathways signals travel between nodes
The methods devices use to share data
Fill in the blank: Guided media sends signals through a (a) .
Which option lists only guided media types?
Twisted pair, coaxial, fiber
Microwave, radio, infrared
Satellite, radio, microwave
Bluetooth, Wi‑Fi, NFC
Unguided media primarily supports which kind of transmission?
Wired transmission using cables
Wireless transmission through free space
Hybrid transmission with repeaters
Optical transmission inside fibers
Explain how the presence or absence of a physical path distinguishes guided from unguided media.
A school plans to connect two buildings with minimal interference and high bandwidth over a fixed route. Which transmission media category is more suitable, and why?
Which pairing correctly matches media category to example technology?
Unguided media — coaxial cable
Guided media — Wi‑Fi routers
Unguided media — twisted pair wires
Guided media — fiber optic cable
Identify the two top-level categories shown in the diagram for transmission media.
Analog media and Digital media
Copper media and Optical media
Physical media and Wireless media
Guided media and Unguided media
Which items in the diagram are examples of guided (physical) media?
Twisted pair cable
Coaxial cable
Fiber-optic cable
Microwave links
Satellite links
Choose the unguided transmission methods depicted in the classification chart.
Twisted pair
Satellite
Coaxial
Microwave
Radio
From the images of guided media, which cable type uses light to carry signals?
Twisted pair cable
Shielded copper cable
Fiber optic cable
Coaxial cable
Fill in the blank: In unguided media, signals travel through (a) rather than a physical cable.
Look at the microwave tower diagram. What requirement is typically needed between towers for successful transmission?
Clear line of sight
Coiled copper pairs
Submarine repeaters
Fiber splicing joints
Compare infrared and satellite images: which method is more suitable for short-range, indoor device connections?
Infrared transmission
Satellite communication
Coaxial backbone
Microwave relay
Strategic scenario: A school needs high-speed, high-bandwidth backbone cabling between buildings with minimal electromagnetic interference. Which guided medium fits best and why?
Which role does a Network Interface Card (NIC) primarily perform in a computer?
Enables sending and receiving data
Provides permanent device power
Stores operating system files
Cools the processor with a fan
Fill in the blank: A modem performs (a) to convert digital data to an analog signal for transmission over telephone lines.
Which pair correctly matches device to communication type?
Wired NIC — Ethernet cable communication
Modem — stores user passwords securely
Wireless NIC — converts analog to digital
USB NIC — repairs corrupted hard drives
A home computer must connect to the internet over a traditional phone line. Which hardware is required to convert signals appropriately?
Wireless NIC to boost Wi‑Fi range
Modem to handle analog–digital conversion
Graphics card to process web pages
USB NIC to increase storage space
Compare analog and digital signals shown: Which statement best describes a digital signal in communication systems?
Random voltage fluctuations over time
Discrete levels representing 1s and 0s
Continuously varying sine‑wave amplitude
Unchanged audio frequencies only
Explain how a NIC and a modem work together when a desktop connects to the internet via DSL. Include each device’s role and the two key processes that occur.
Which device decides the best path for data to travel across large networks?
Router between networks
Switch in a local rack
Firewall on each host
Modem in the wall
Fill in the blank: A (a) allows a private network to communicate with an Internet Service Provider’s network.
In the diagram, what is the correct order of devices from the internet to a laptop?
Router → Modem → Laptop
Internet → Router → Modem
Internet → Modem → Router
Laptop → Router → Internet
Which statement best describes a switch’s primary role in a network?
Translating signals from ISP lines
Blocking hackers from the internet
Boosting and sharing local connections
Choosing IP routes across networks
Which address type does a router primarily use to forward packets between networks?
MAC addresses on frames
Port numbers on sockets
Usernames on devices
IP addresses in packets
A school wants to connect many classroom computers and improve signal distribution within the building. Which device should be added to each floor, and why?
Which device can also act as a firewall to protect a network from hackers?
Core switch in a rack
Wireless access point
Home router device
End-user laptop
Two departments in a company must exchange data securely with the ISP while internal devices communicate locally. Choose the best placement of devices.
Which device primarily forwards data packets between different networks using IP addresses?
Access point projecting Wi‑Fi signal
Router connecting networks using IP
Bluetooth adapter pairing peripherals
Switch within local network using MAC
Fill in the blank: A switch exchanges data (a) its own network or LAN.
Which statement best describes an access point?
Assigns IP addresses to all devices automatically
Connects multiple wired networks together
Translates digital signals to wireless and broadcasts
Stores MAC addresses for packet switching
A school wants phones and laptops to join the existing wired LAN wirelessly. Which device should be added, and where should it connect?
Which technology is typically faster and has a longer range for internet access in a LAN?
Bluetooth for short‑range peripherals
Wi‑Fi family of radio protocols
Wired modem over telephone
Hotspot public Wi‑Fi location
Match each device or technology to its primary role.
Switch: forwards frames within LAN using MAC
Bluetooth: short‑range device communication
Router: routes between networks using IP
Access point: projects Wi‑Fi to clients
Hotspot: public place with Wi‑Fi
A small office has two separate networks that must communicate. Which device should be used to connect them and why?
Which description is most accurate for how a switch decides where to forward frames?
By checking IP addresses in a routing table
By broadcasting to all ports every time
By using MAC addresses in a CAM table
By converting signals to Wi‑Fi radio waves
