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Networking & Communication Technology

Practice MCQs

Networking and Communication Technology deals with connecting computers, mobile devices, servers, printers, and other digital devices so that they can share data, resources, and services.

Computer Awareness Networking & Communication Technology Competitive Exams

Networking and Communication Technology deals with connecting computers, mobile devices, servers, printers, and other digital devices so that they can share data, resources, and services. It is an important topic in computer awareness, digital literacy, competitive exams, and basic IT studies.

What is Computer Networking?

A computer network is a group of two or more devices connected together for sharing data, files, internet connection, printers, applications, and other resources.

For example, computers in a school lab may be connected through a local network. A mobile phone connected to Wi-Fi is also using networking. The internet itself is the largest network, connecting millions of devices across the world.

Quick idea: Networking allows devices to communicate. Communication technology provides the methods, media, and rules for data transfer.
Term Meaning Example
Network Connected group of computers or devices Office network, school lab network
Node Any device connected to a network Computer, printer, mobile phone
Server Computer that provides services or resources Web server, file server
Client Device that requests services from a server Browser requesting a webpage
Protocol Set of rules for communication TCP/IP, HTTP, FTP
Bandwidth Data carrying capacity of a connection 100 Mbps internet connection

“Networking connects devices, and communication technology helps them exchange information.”

Computer Awareness Tip
Key points
  • A network connects devices for communication.
  • LAN covers a small area such as office or lab.
  • WAN covers large geographical areas.
  • Internet is the largest public network.
  • Protocols define communication rules.
  • Routers, switches, modems, and cables are common networking components.
network LAN WAN internet protocols

Visual Understanding

These diagrams show how devices connect and communicate through networks.

Basic Computer Network
Switch Computer 1 Computer 2 Printer Server

A network allows computers to share printers, files, internet, and applications.

Client-Server Communication
Client Requests service Server Provides service Request Response Browser asks, web server responds

In client-server networking, the client requests information and the server provides it.

LAN, WAN and Internet
LAN Small area MAN City area WAN Large area Internet

LAN is local, MAN is metropolitan, WAN is wide-area, and the internet connects global networks.

Data Travels in Packets
Sender Receiver P1 P2 P3 Large data is broken into smaller packets for transmission

In digital communication, data may be divided into packets and reassembled at the destination.

Important Concepts and Examples

Network Devices

Hardware devices used to connect, control, and manage network communication.

  • Router
  • Switch
  • Modem
  • Access point
Transmission Media

Medium through which data travels from one device to another.

  • Twisted pair cable
  • Coaxial cable
  • Optical fibre
  • Radio waves
Common Protocols

Protocols are rules used for communication between devices.

  • TCP/IP
  • HTTP/HTTPS
  • FTP
  • SMTP
Communication Modes

Data communication can happen in different directions.

  • Simplex
  • Half-duplex
  • Full-duplex
  • Broadcast
LAN

Local Area Network connects devices within a small area.

  • Home network
  • Office network
  • Computer lab
  • Small building network
WAN

Wide Area Network connects devices over large geographical areas.

  • Bank branch network
  • Corporate network
  • Telecom network
  • Internet
Wireless Communication

Communication without physical cables using electromagnetic waves.

  • Wi-Fi
  • Bluetooth
  • Mobile networks
  • Satellite communication
Internet Services

Services available through the internet for users and organizations.

  • Email
  • Web browsing
  • Online banking
  • Cloud storage
Rule: Networking connects devices. Communication technology transfers data using protocols, media, devices, and services.

Types of Networks

Network Type Full Form Coverage Area Example
PAN Personal Area Network Very small personal range Bluetooth connection between phone and earbuds
LAN Local Area Network Room, building, office, lab School computer lab network
MAN Metropolitan Area Network City or large campus City-wide cable network
WAN Wide Area Network Country, continent, global area Bank branches connected across India
WLAN Wireless Local Area Network Local area without cables Wi-Fi network
VPN Virtual Private Network Secure private connection over public network Remote office access
Internet Interconnected global network Worldwide Websites, email, cloud services
Exam approach: Remember coverage order: PAN → LAN → MAN → WAN → Internet.

Common Networking Devices and Protocols

Item Type Purpose Simple Example
Router Networking device Connects different networks and forwards data Home Wi-Fi router
Switch Networking device Connects devices within a LAN Office network switch
Modem Communication device Connects home or office network to ISP Broadband modem
Access Point Wireless device Provides Wi-Fi access to devices Wi-Fi access point
HTTP Protocol Used for web communication Opening websites
HTTPS Secure protocol Secure web communication Online banking website
FTP Protocol Used for file transfer Uploading files to server
SMTP Protocol Used for sending emails Email sending service
IP Address Network address Identifies a device on a network 192.168.1.10
DNS Name resolution system Converts domain names into IP addresses example.com to IP address
Important: A router connects networks, while a switch mainly connects devices inside the same local network.

Common Types of Questions

Network Type Questions

Questions based on PAN, LAN, MAN, WAN, WLAN, VPN, and internet.

  • LAN meaning
  • WAN coverage
  • PAN examples
  • Internet as network
Device Questions

Questions asking the function of routers, switches, modems, and access points.

  • Router
  • Switch
  • Modem
  • Access point
Protocol Questions

Questions based on rules used for network communication.

  • TCP/IP
  • HTTP/HTTPS
  • FTP
  • SMTP
Internet Questions

Questions based on web, email, DNS, IP address, URL, and cloud services.

  • DNS
  • IP address
  • URL
  • Email services
Exam approach: For networking questions, first identify whether the question is about network type, device, protocol, communication medium, or internet service.
Quick Identification Bank
LAN

Connects devices in a small area.

Example: Office network

Router

Connects different networks and forwards data.

Use: Internet sharing

IP Address

Identifies a device on a network.

Example: 192.168.1.5

DNS

Converts domain names into IP addresses.

Use: Website access

Tip: Remember router connects networks, switch connects devices, and modem connects to the ISP.

Networking Learning Flow
Devices Media Protocols Communication Network devices use media and protocols to exchange data
This flow helps revise networking and communication technology quickly.

Solved Examples

Question Explanation Answer
What is a computer network? A computer network is a group of connected devices that can share data, resources, and services. Connected group of devices
What does LAN stand for? LAN connects devices within a small area such as a home, office, school lab, or building. Local Area Network
Which device connects different networks? A router forwards data between networks and is commonly used to connect a local network to the internet. Router
Which device connects devices inside a LAN? A switch connects multiple devices within a local network. Switch
What is an IP address? An IP address is a numerical address used to identify a device on a network. Network address of a device
What does DNS do? DNS converts human-readable domain names into IP addresses that computers use. Converts domain name to IP address
What is HTTPS used for? HTTPS is used for secure communication between a browser and a web server. Secure web communication
What is Bluetooth commonly used for? Bluetooth is used for short-range wireless communication between devices. Short-range wireless communication

Note: Networking questions often test full forms, device functions, protocols, and network types.

Common Traps and Shortcuts

Common Traps
  • Confusing router with switch.
  • Confusing LAN with WAN.
  • Thinking internet and web are exactly the same.
  • Confusing IP address with domain name.
  • Thinking Wi-Fi and internet are the same thing.
  • Confusing HTTP and HTTPS.
Useful Shortcuts
  • LAN means local area.
  • WAN means wide area.
  • Router connects networks.
  • Switch connects devices in LAN.
  • DNS converts names to IP addresses.
  • HTTPS means secure web communication.
Exam approach: First identify whether the question asks about area, device, address, protocol, service, or medium.

Practice

A) Multiple Choice Questions
  1. LAN stands for:
    Large Area Network Local Area Network Logical Access Network Linked Area Node
  2. Which device connects different networks?
    Keyboard Router Monitor Scanner
  3. DNS is used to:
    Print documents Convert domain names to IP addresses Edit images Format hard disk only
  4. HTTPS is mainly used for:
    Secure web communication Playing local music only Keyboard input Screen brightness
  5. Bluetooth is an example of:
    Wired communication Short-range wireless communication Output device Spreadsheet software
B) Solve the Higher-Order Questions
  1. Explain the difference between LAN and WAN with one example each. (Hint: Compare coverage area.)
  2. Differentiate between router and switch. (Hint: Router connects networks; switch connects LAN devices.)
  3. Why is DNS important for internet browsing? (Hint: It converts domain names into IP addresses.)
  4. Write any four internet services. (Hint: Email, browsing, cloud, online banking.)
  5. Classify the following: Wi-Fi, FTP, IP address, modem. (Hint: Wireless technology, protocol, address, device.)
C) Match the Concept with the Correct Meaning
Concept Correct Meaning
LAN Network covering a small local area
WAN Network covering a large geographical area
Router Connects different networks
Switch Connects devices within a LAN
DNS Converts domain names into IP addresses
HTTPS Secure web communication protocol
Computer Awareness Reminder

Networking connects devices for sharing data and resources. Communication technology uses transmission media, protocols, devices, and services to exchange information between systems.

Task: Create five examples each of network devices, network types, and internet services.

Show Suggested Answers
Multiple Choice
  1. Local Area Network
    LAN connects devices within a small area such as a home, office, or lab.
  2. Router
    A router connects different networks and forwards data between them.
  3. Convert domain names to IP addresses
    DNS helps browsers locate websites using domain names.
  4. Secure web communication
    HTTPS provides secure communication between browser and web server.
  5. Short-range wireless communication
    Bluetooth is used for short-distance wireless communication.
Higher-Order Questions
  1. LAN and WAN:
    LAN covers a small local area such as a school lab or office. WAN covers a large area such as cities, countries, or global branches. Internet is a common WAN example.
  2. Router and switch:
    A router connects different networks and helps share internet. A switch connects multiple devices within the same local area network.
  3. Importance of DNS:
    DNS converts domain names such as a website name into IP addresses. Without DNS, users would need to remember numerical IP addresses.
  4. Internet services:
    Email, web browsing, online banking, cloud storage, video conferencing, e-commerce, and online learning are common internet services.
  5. Classification:
    Wi-Fi → Wireless networking technology. FTP → File transfer protocol. IP address → Network address. Modem → Communication/network device.
Concept Matching
  1. LAN → Network covering a small local area
  2. WAN → Network covering a large geographical area
  3. Router → Connects different networks
  4. Switch → Connects devices within a LAN
  5. DNS → Converts domain names into IP addresses
  6. HTTPS → Secure web communication protocol
Clue Explanation

Networking is about connection and communication. Devices connect through media, follow protocols, use addresses, and exchange data across local or wide networks.

Exam tips
  • LAN means Local Area Network.
  • WAN means Wide Area Network.
  • Router connects networks.
  • Switch connects LAN devices.
  • DNS converts domain names to IP addresses.
  • HTTPS is secure web communication.
Practice MCQs