Internet | Description, History, Types & Courses

Internet | Description, History, Types & Courses

The Internet is also commonly called the Net, this topic will explain the introduction to the Internet and basic terminology, along with different types of Internet connections and tools/services such as Web Browser, Search Engine, Email, Cloud Services, Social Networking, and Online Services.

It will also cover practical and safe use aspects like Internet Security, Digital Payment Systems, and Government Internet Services.

Introduction to Internet

What is the Internet?

The Internet is a global network of computers and mobile devices connected to each other to share information and data. With the help of the net, we can send emails, browse websites, shop online, attend online classes, and communicate with people worldwide.

History of Internet

• In the 1960s, the Internet started in the USA as
  ARPANET
• Initially used only by government and educational
  institutions
• After 1990, it became available to the general
  public
• Today, the Internet is used all over the world

Uses of Internet

• Education: Online classes, e-books, research
• Business: Online marketing, video meetings
• Banking: Net banking, UPI transactions
• Entertainment: YouTube, movies, online games
• Communication: Email, chat, video calls

Features of Internet

• Available 24×7
• Fast and easy access to information
• Global connectivity
• Saves time and effort

Internet vs Intranet vs Extranet

• Internet: Public network available to everyone
• Intranet: Private network used within an
  organization
• Network accessible to limited external
  users

Basic Internet Terminology

Website

A website is a collection of related web pages that are stored on a server and can be accessed on the net using a web browser.

Webpage

A webpage is an individual digital document available on the Internet that opens inside a web browser.

Homepage

A homepage is the main or first page of a website that appears when you visit its URL. It usually serves as a starting point to navigate to other pages and sections of the website.

URL (Uniform Resource Locator)

A Uniform Resource Locator (URL) is the unique address used to access a specific webpage or resource on the net. It tells the web browser where to find the page and how to retrieve it,

For example: https://www.xyz.com.

Domain Name

A domain name is a human-readable address of a website that people type in a web browser to visit it.

For example, in www.google.com, google.com is the domain name.

IP Address

A unique numerical address assigned to every device connected to the net.
Example: 192.168.1.1

Web Server

A web server is a system that stores, processes, and delivers websites to users over the internet.

When someone enters a website URL, the web server receives the request and sends back web pages, images, or data through a browser.

Client–Server Concept

The client–server concept is a model where a client requests services or data, and a server responds by providing them.

Clients are usually user devices like computers or phones, while servers manage resources, processing, and storage centrally.

Types of Internet Connections

Dial-up Connection

A dial-up connection is an old method of accessing the internet using a telephone line and a modem.

It connects by dialing a phone number and provides slow data transfer compared to modern broadband technologies.

Broadband Connection

A broadband connection is a high-speed internet service that allows continuous access without dialing.

It supports faster data transfer and can handle activities like streaming, online gaming, and video calls smoothly.

Wi-Fi

Wi-Fi is a wireless networking technology that allows devices to connect to the internet without physical cables.

It uses radio waves to provide internet access within a limited range, such as homes, offices, or public hotspots.

Mobile Internet

Mobile internet is a wireless service that allows users to access the internet through cellular networks on smartphones and tablets.

It uses technologies like 3G, 4G, and 5G to provide data connectivity while moving from one place to another.

Optical Fiber

Optical fiber is a technology that transmits data as light signals through thin strands of glass or plastic.

It offers extremely high speed, long-distance communication, and better reliability compared to traditional copper cables.

Hotspot

A hotspot is a physical location or device that provides internet access wirelessly using Wi-Fi.

It allows nearby devices like smartphones and laptops to connect to the internet without needing a direct wired connection.

Web Browser

What is a web browser?

A web browser is a software application that allows users to access and view websites on the internet.

It interprets web pages, images, and videos so they can be displayed and interacted with on devices like computers and smartphones.

Popular Web Browsers

• Google Chrome
• Mozilla Firefox
• Microsoft Edge
• Safari

Parts of a Web Browser

• Address Bar: Used to type the website URL
• Tab: Used to open multiple pages at once
• Bookmark: Saves favorite websites
• History: Shows previously visited websites
• Settings: Used to control browser options

Search Engine

What is a search engine?

A search engine is an online tool that helps users find information on the internet by entering keywords or phrases.

It scans the web, indexes pages, and displays the most relevant results based on the query.

Popular Search Engines

• Google
• Bing
• Yahoo

Search Techniques

• Keyword Search
• Image Search
• Video Search
• Advanced Search
• Searching using exact words, date, or file type.
  

Email

What is E-Mail

Email, or electronic mail, is a method of sending and receiving messages over the internet.

It allows users to communicate instantly, share files, and store messages digitally without using traditional paper mail.

Creating an E-Mail ID

Creating an email ID involves registering with an email service provider by choosing a unique username and password.

Once set up, it allows you to send, receive, and organize electronic messages securely online.

Parts of an Email

• To: Main recipient
• CC: Carbon Copy
• BCC: Blind Carbon Copy
• Subject: Topic of the email
• Attachment: Files sent with the email

Mail Folders

• Inbox: Received emails
• Outbox: Sent emails
• Draft: Incomplete emails
• Spam: Unwanted emails

E-Mail Etiquette

Using polite language, proper subject line, and avoiding unnecessary emails.

Cloud Services

Cloud Computing

Cloud computing is a technology that delivers computing services like storage, databases, and software over the internet.

It lets users access resources on-demand without owning physical hardware, making work more flexible and scalable.

Cloud Storage Services

• Google Drive
• OneDrive
• Dropbox

File Upload and Download

File upload is the process of transferring data from your device to a server or cloud storage, making it accessible online.

File download is the opposite, where you retrieve and save data from the internet or a server into your device for offline use.

File Sharing

File sharing is the practice of distributing or providing access to digital files between devices or users over a network.

It allows multiple people to view, edit, or download documents, images, and other data efficiently and collaboratively.

Social Networking

Social Media

Social media refers to online platforms that enable people to create, share, and interact with content or connect with others.

It allows users to communicate, express ideas, and build communities across the globe in real time.

Popular Social Networking Sites

• Facebook
• Instagram
• Twitter (X)
• LinkedIn

Basic Features

Creating an account, posting content, liking, sharing,
and commenting.

Advantages

• Communication
• Marketing and promotion
• Information sharing

Disadvantages

• Time wastage
• Privacy issues
• Fake news

Online Services

Online Banking

Online banking is a digital service that allows users to manage their bank accounts and perform financial transactions over the net.

It enables activities like transferring money, paying bills, and checking balances without visiting a physical bank branch.

Online Shopping

Online shopping is the process of buying products or services over the internet through websites or apps.

It offers convenience, a wide variety of choices, and home delivery, eliminating the need to visit physical stores.

Online Ticket Booking

Online ticket booking is a service that allows users to reserve and purchase tickets for travel, movies, or events via the net.

It provides convenience by letting people choose seats, pay digitally, and receive instant confirmation without visiting a ticket counter.

Online Bill Payment

Online bill payment is a digital service that lets users pay utility, credit card, or other bills through the net.

It saves time, provides instant confirmation, and often includes features like automatic recurring payments for convenience.

E-Learning

E-learning is the use of digital platforms and online resources to access educational content and courses.

It allows students to learn anytime, anywhere, often with interactive tools, videos, and quizzes to enhance understanding.

Online Forms

Online forms are digital documents that users can fill out and submit over the internet.
They are used for applications, registrations, surveys, or feedback, making data collection faster and more organized than paper forms.

Internet Security

Internet Security

Internet security involves protecting computers, networks, and data from online threats like viruses, hackers, and phishing.

It ensures safe browsing, secure transactions, and privacy while using the net.

Virus, Worm, Trojan

A virus is a malicious program that attaches to files and spreads by infecting other programs or devices.

A worm is self-replicating malware that spreads across networks without needing to attach to files.

A Trojan disguises itself as a legitimate program but secretly harms the system or steals data once executed.

Antivirus Software

Antivirus software is a program designed to detect, prevent, and remove malicious software from computers and devices.

It scans files and programs for viruses, worms, and Trojans to keep systems safe and running smoothly.

Firewall

A firewall is a security system that monitors and controls incoming and outgoing network traffic.

It acts as a barrier between a trusted network and untrusted networks, helping to prevent unauthorized access and cyberattacks.

Strong Password

A strong password is a secure combination of letters, numbers, and symbols that protects accounts from unauthorized access.

It is usually long, unique, and hard to guess, reducing the risk of hacking or identity theft.

Phishing

Phishing is a cyberattack where fraudsters trick users into revealing sensitive information like passwords or bank details.

It often appears as fake emails, messages, or websites that look legitimate but are designed to steal personal data.

Cybercrime

Cybercrime is illegal activity carried out using computers or the net, such as hacking, identity theft, or fraud.

It targets individuals, businesses, or governments, causing financial loss, data breaches, or disruption of services.

Digital Payment System

Digital Payment

Digital payment is a method of transferring money electronically using apps, websites, or cards instead of cash.

It enables quick, secure, and convenient transactions for shopping, bills, or peer-to-peer transfers.

UPI

UPI (Unified Payments Interface) is a real-time payment system that allows users to transfer money between bank accounts using a mobile device.

It simplifies digital transactions by using just a smartphone and a virtual ID, making payments fast, secure, and convenient.

Net Banking

Net banking is an online service provided by banks that allows account holders to manage their finances via the internet.

Users can check balances, transfer money, pay bills, and access other banking services without visiting a branch.

Debit and Credit Cards

Debit and credit cards are plastic cards used for electronic payments, but they work differently.

A debit card deducts money directly from your bank account, while a credit card allows spending on borrowed funds to be paid later.

Mobile Wallets

Mobile wallets are apps or digital platforms that store payment information on smartphones for easy transactions.

They allow users to pay bills, shop online, or transfer money without carrying physical cash or cards.

For example : Paytm, PhonePe, Google Pay

Payment Safety

Payment safety involves measures to protect financial transactions from fraud, theft, or unauthorized access.

It includes using secure passwords, two-factor authentication, and trusted platforms to ensure online payments are safe and reliable.

important for safety

Do not share OTP, and use secure websites.

Government Internet Services

Digital India

Digital India is a government initiative aimed at transforming India into a digitally empowered society and knowledge economy.

It promotes online services, digital infrastructure, and e-governance to make public services accessible, efficient, and transparent.

UIDAI

UIDAI (Unique Identification Authority of India) is the government agency responsible for issuing Aadhaar numbers to residents.

It provides a unique 12-digit identity linked to biometric and demographic data, helping in efficient delivery of services and benefits.

PAN Card Online

PAN card online refers to applying for a Permanent Account Number through internet portals without visiting a center.

It allows individuals to submit documents, pay fees, and receive their PAN digitally, simplifying tax and financial identification.

Passport Services

Passport services are government-provided facilities for applying, renewing, or tracking passports.

They enable citizens to obtain travel documents efficiently, often through online applications, appointments, and status tracking systems.

E-Governance

E-governance is the use of digital technology by governments to deliver services and information to citizens efficiently.

It improves transparency, reduces paperwork, and allows people to access services like licenses, payments, and records online.

internet notes in English

internet topic available in courses

DCA (Diploma in Computer Applications)

DCA (Diploma in Computer Applications) is a professional course that teaches students the fundamentals of computers. It covers MS Office, net usage, email, and basic programming concepts.

It is ideal for beginners who are looking for office jobs or career growth. After completing DCA, students become confident and efficient in the digital environment.

ADCA (Advanced Diploma in Computer Applications)

The full form of the ADCA course is Advanced Diploma in Computer Applications. It is a professional computer diploma course that provides students with practical training from the basic level to the advanced level of computer applications.

DIT (Diploma in Information Technology)

DIT (Diploma in Information Technology) is a professional course that provides students with in-depth knowledge of computer systems, software, and IT applications.

It covers computer fundamentals, programming, networking, internet technology, database management, and office automation. This course is designed for students who want to develop strong technical skills in IT and related fields.

CCC (Course on Computer Concepts)

CCC is a computer course designed to improve basic computer knowledge and literacy. It provides
theoretical background as well as in depth knowledge of software/packages. The CCC certificate is officially issued by NIELIT (National Institute of Electronics and Information Technology), Government of India.

BCC (Basic Computer Course)

A Basic Computer Course is an entry-level training program of computer course that teaches the fundamental concepts of computers. It focuses on practical learning so that students can easily understand the use of computers in real life.

O Level Computer Course

O Level is a foundation-level computer course conducted under NIELIT (National Institute of Electronics and Information Technology), which is organized by the Government of India.

The main purpose of this course is to build a strong foundation in computer basics, programming, internet technology, office automation, and the digital working environment.

ADCE (Advanced Diploma in Computer Engineering)

ADCE (Advanced Diploma in Computer Education) is a professional computer course. In this course, students are trained in computers from the basic level to the advanced level.

Its main goal is to prepare students for jobs so that after completing the course, they can easily apply for jobs and work in the industry.

DCE (Diploma in Computer Engineering)

It is a professional technical course that provides students with practical and theoretical knowledge of computer technology and computer engineering, covering concepts from basic to advanced levels.

DCE’s main focus of this course is to develop skills in computer hardware, software, programming languages, networking, and problem-solving.

internet notes in Hindi

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