The Internet is a global network of millions of computers connected together to shae:
- Information
- Websites
- Emails
- Files
- Online services
The internet is the biggest WAN (Wide Area Network)
1. What is the Internet?
The internet is the biggest WAN (Wide Area Network)
2. Features of the Internet
- Worldwide access
- Access to unlimited information
- Email and communication
- Online shopping
- Online banking
- Entertainment
- Cloud services
3. What is an Intranet?
An Intranet is a private network used inside an organization.
Only authorized people can access it.
It is not availaible to the public, unlike the internet.
Examples
- School Internal website
- Office internal portal for employees
- Company HR portal
- Private document sharing system
4. Difference Between Internet and Intranet (Very Important)
| Feature | Internet | Intranet |
|---|---|---|
| Access | Open for all | Only authorized users |
| Size | Very large (global) | Small (within organization) |
| Security | Less secure | More secure |
| Usage | Browsing, social media, emails | Internal communication, data sharing |
| Example | Google, YouTube | Office internal site |
5. What is Extranet?
An Extranet is like an Intranet + guests.
Used by:
- Suppliers
- Business Partners
- Vendors
Example: A company allowing vendors to check order status using login.
6. How does the Internet Work?
The internet works with:
- Servers → Stores websites
- Clients → Your phone or computer
- IP Address → Unique address of each device
- DNS → Converts website name into IP
- Router → Sends data to coneect destination
- ISP → Internet Serice Provider (Jio, Airtel, BSNL)
7. Internet Services (Most Scoring Topic)
⭐ Web Browsing
Using Chrome, Firefox, Edge to open websites.
Service like Gmail, Outlook.
⭐ WWW (World Wide Web)
A collection of webpages.
⭐ FTP
Used for uploading/downloading files.
⭐ VoIP
Voce over Internet Protocol (e.g., Whatsapp call).
⭐ Cloud Computing
Google Drive, iCloud, Dropbox.
8. Advantages of Internet
- Global communication
- Fast information
- Online learning
- Job opportunities
- Easy payments
- Entertainment
9. Disadvantages of Internet
- Hacking
- Virus attacks
- Cyberbullying
- Fake news
- Addiction
- Privacy issues
10. Important Exam Questions
✓ What is the Internet?
A global network connecting millions of computers.
✓ What is the Intranet?
A private network inside an organization.
✓ Internet = Public?
Yes.
✓ Intranet = Private
Yes.
✓ Full form of WWW?
World Wide Web.
✓ Full form of ISP
Internet Service Provider.
✓ What converts website name to IP?
DNS.