Internet Applications | Web, Email, Chat & VoIP | Complete Notes | CBSE Class 12 Informatics Practices (2026–27)
Class 12 · Informatics Practices
Internet Applications | Web, Email, Chat & VoIP
The Internet is not only a network connecting computers around the world but also a platform that provides numerous services for communication, information sharing, learning, entertainment, and business. These services are known as Internet Applications.
The CBSE Class 12 Informatics Practices syllabus focuses on four major Internet applications: Web, Email, Chat, and VoIP (Voice over Internet Protocol).
What are Internet Applications?
Internet Applications are software services that use the Internet to enable communication, information access, collaboration, and online activities.
1. Web (World Wide Web)
The Web or World Wide Web (WWW) is a collection of interconnected web pages and websites that can be accessed through a web browser using the Internet.
Features
- Provides information in the form of web pages.
- Uses hyperlinks to connect pages.
- Accessible through web browsers.
- Supports multimedia such as text, images, audio, and videos.
Examples
- Educational websites
- News portals
- Online shopping websites
- Government websites
2. Email (Electronic Mail)
Email (Electronic Mail) is an Internet service used to send and receive digital messages and files between users.
Features
- Fast communication.
- Supports file attachments.
- Can send messages to multiple recipients.
- Accessible from anywhere with Internet connectivity.
Main Components of an Email
| Field | Purpose |
|---|---|
| To | Recipient's email address. |
| CC | Carbon Copy to additional recipients. |
| BCC | Blind Carbon Copy (hidden recipients). |
| Subject | Brief description of the message. |
| Body | Main content of the email. |
| Attachment | Files sent along with the email. |
Examples
- Sending assignments to teachers.
- Business communication.
- Online registration confirmations.
3. Chat
Chat is an Internet service that enables users to exchange text messages instantly in real time.
Features
- Instant messaging.
- Group chats.
- Media sharing.
- Voice notes and emojis.
Examples
- Telegram
- Google Chat
- Microsoft Teams Chat
4. VoIP (Voice over Internet Protocol)
VoIP (Voice over Internet Protocol) is a technology that allows voice communication over the Internet instead of traditional telephone networks.
How VoIP Works
- Your voice is converted into digital data packets.
- The packets travel over the Internet.
- The receiver's device converts the packets back into voice.
Examples
- WhatsApp Voice Calling
- Skype
- Google Meet Voice Calls
- Zoom Meetings
Related Application: Video Conferencing
Although the CBSE syllabus specifically mentions VoIP, modern Internet communication often combines voice with video through video conferencing applications.
Examples
- Google Meet
- Zoom
- Microsoft Teams
- Cisco Webex
Applications
- Online classes.
- Business meetings.
- Remote interviews.
- International collaboration.
Advantages of Internet Applications
| Advantage | Description |
|---|---|
| Fast Communication | Messages and calls reach instantly. |
| Global Connectivity | Connects people worldwide. |
| Information Access | Easy access to educational and professional resources. |
| Cost Effective | Reduces communication costs. |
| Collaboration | Supports teamwork through online platforms. |
Limitations of Internet Applications
| Limitation | Description |
|---|---|
| Internet Dependency | Requires a stable Internet connection. |
| Cybersecurity Risks | Susceptible to hacking, phishing, and malware. |
| Privacy Concerns | Personal information may be exposed if security measures are weak. |
| Network Congestion | Slow Internet affects performance. |
Comparison of Internet Applications
| Application | Main Purpose | Example |
|---|---|---|
| Web | Access information | Educational websites |
| Send messages and files | Gmail, Outlook | |
| Chat | Instant messaging | WhatsApp, Telegram |
| VoIP | Voice communication | Skype, Google Meet |
Real-Life Applications
| Field | Internet Application |
|---|---|
| Education | Online learning, email, video conferencing |
| Business | Email, VoIP, collaboration tools |
| Healthcare | Telemedicine consultations |
| Banking | Online banking websites |
| Government | E-Governance portals |
Common Errors
| Mistake | Correct Concept |
|---|---|
| Internet and Web are the same. | The Web is one of the services available on the Internet. |
| Email and Chat are identical. | Email is generally asynchronous, while chat provides real-time communication. |
| VoIP requires a traditional telephone line. | VoIP uses the Internet for voice communication. |
| Chat supports only text. | Modern chat applications support images, documents, voice notes, and video. |
Quick Revision
| Application | Remember |
|---|---|
| Web | Access websites and web pages |
| Electronic messages and attachments | |
| Chat | Real-time text communication |
| VoIP | Voice calls over the Internet |
CBSE Exam Tips
- Differentiate clearly between the Internet and the World Wide Web.
- Remember the components of an email: To, CC, BCC, Subject, Body, and Attachment.
- Chat is a real-time communication service, while email is generally asynchronous.
- VoIP enables voice communication through the Internet instead of traditional telephone networks.
- Be able to identify suitable Internet applications for different real-life situations.
Summary
Internet applications make communication and information sharing fast, convenient, and accessible worldwide. The Web provides access to websites and online information, Email enables digital communication and file sharing, Chat supports instant messaging, and VoIP allows voice communication over the Internet. These services have become essential in education, business, healthcare, government, and everyday life, making them important concepts in the CBSE Class 12 Informatics Practices curriculum.