5. Internet & Networking

🔹 5. Internet & Networking (Practical Awareness)

5.1 Introduction to Internet

In today’s digital world, the Internet plays a very important role in communication, education, government services, and competitive examinations.

👉 Definition (Exam-Friendly):

The Internet is a global network of interconnected computers that communicate with each other using standard protocols.

📌 It allows users to share information, communicate, and access services worldwide.

5.2 History of Internet (Brief)

Originated from ARPANET (USA)

Initially used for defense and research

Later expanded for public use

Today, internet connects billions of devices

📌 Not asked in detail, but basic awareness is useful.

5.3 Uses of Internet

The internet has many uses in daily life and government work.

🔹 Major Uses:

Email communication

Online education

Online banking

Government services (e-Governance)

Online exams and applications

Information search

📌 Internet is essential for KPSC online applications.

5.4 Components Required for Internet

To access the internet, the following are required:

Computer / Smartphone

Internet Service Provider (ISP)

Modem / Router

Web Browser

5.5 Internet Service Provider (ISP)

👉 Definition:

An Internet Service Provider (ISP) is a company that provides internet access.

Examples:

BSNL

Jio

Airtel

ACT

Vodafone

📌 ISPs provide internet through fiber, broadband, or mobile data.

5.6 Web Browser

What is a Web Browser?

A web browser is a software application used to access and view websites.

👉 Definition:

A web browser allows users to retrieve and display web pages from the internet.

Examples:

Google Chrome

Mozilla Firefox

Microsoft Edge

Safari

📌 Browser ≠ Internet (very common exam question)

5.7 Search Engine

What is a Search Engine?

A search engine helps users find information on the internet.

👉 Definition:

A search engine is a software system designed to search information on the World Wide Web.

Examples:

Google

Bing

Yahoo

DuckDuckGo

📌 Google is the most widely used search engine.

5.8 World Wide Web (WWW)

👉 Definition:

WWW is a collection of web pages connected through hyperlinks and accessed using the internet.

📌 Invented by Tim Berners-Lee

Difference:

Internet = Network

WWW = Service on the internet

5.9 Website & Web Page

Website:

Collection of related web pages

Example: kpsc.kar.nic.in

Web Page:

Single page of information

📌 Website contains multiple web pages.

5.10 URL (Uniform Resource Locator)

👉 Definition:

URL is the address of a web page on the internet.

Example:

Copy code

https://www.kpsc.kar.nic.in

Parts of URL:

Protocol (https)

Domain name

Path

📌 HTTPS is more secure than HTTP.

5.11 Email (Electronic Mail)

What is Email?

Email is one of the most important internet services.

👉 Definition:

Email is a method of sending and receiving messages electronically over the internet.

5.11.1 Parts of Email Address

Example:

Copy code

example@gmail.com

Username

@ symbol

Domain name

5.11.2 Features of Email

Fast communication

Attach files

Free or low cost

Can be accessed anywhere

5.11.3 Common Email Services

Gmail

Yahoo Mail

Outlook

📌 Email is compulsory for online applications.

5.12 Social Media

What is Social Media?

Social media platforms allow users to create, share, and exchange information.

Examples:

Facebook

WhatsApp

Instagram

Twitter (X)

Uses:

Communication

Awareness programs

Government notifications

📌 Use responsibly to avoid misinformation.

5.13 Introduction to Computer Networks

What is a Computer Network?

A computer network is a group of computers connected together to share data and resources.

👉 Definition:

A computer network connects multiple computers to share information and resources.

5.14 Advantages of Networking

Resource sharing

Data sharing

Communication

Cost reduction

Centralized control

5.15 Types of Networks (VERY IMPORTANT)

🔹 1. LAN (Local Area Network)

Covers small area

Example: Office, school

📌 Fast and low cost

🔹 2. MAN (Metropolitan Area Network)

Covers city or town

Example: City cable network

🔹 3. WAN (Wide Area Network)

Covers large geographical area

Example: Internet

📌 Internet is the largest WAN.

5.16 Network Devices

🔹 Modem

Converts digital to analog signals

🔹 Router

Connects multiple networks

Used in homes and offices

🔹 Switch

Connects devices within a LAN

🔹 Hub

Simple networking device (less efficient)

5.17 Protocols

What is a Protocol?

A protocol is a set of rules for data communication.

Common Protocols:

HTTP / HTTPS

FTP

TCP/IP

SMTP

📌 TCP/IP is the backbone of the internet.

5.18 IP Address

👉 Definition:

An IP address is a unique address assigned to each device on a network.

Example:

Copy code

192.168.1.1

Types:

IPv4

IPv6

📌 Used to identify devices on the internet.

5.19 Cloud Computing (Basic Awareness)

What is Cloud Computing?

Cloud computing allows users to store and access data online.

Examples:

Google Drive

OneDrive

Dropbox

Advantages:

Access anywhere

Data backup

Cost effective

5.20 Internet Safety & Basic Awareness

Use strong passwords

Do not share OTP

Avoid suspicious links

Use antivirus software

📌 Cyber safety questions are increasing in exams.

5.21 Importance of Internet & Networking for KPSC Exams

Frequently asked topics: ✔ Definition of Internet

✔ Browser vs Search engine

✔ Types of networks

✔ Email features

✔ LAN / WAN / MAN

5.22 Common MCQ Areas

Internet was developed from ___

Which is not a browser?

Largest network is ___

Full form of URL

Example of WAN

✅ Final Exam Tips

Focus on definitions

Learn differences

Remember examples

Practice MCQs daily