Web Services Full Revision With PYQs | Class 12 Computer Networks (CBSE 2026)

Welcome to Lecture 8 of the Class 12 Computer Science Quick Revision Series (CBSE 2026)! 🌐💻

In this video, we tackle Web Services — the final topic of the Computer Networks unit. We break down the confusing terminology of the World Wide Web, ensuring you can clearly distinguish between concepts like HTML vs. XML and Web Browsers vs. Web Servers.

🎯 Goal: To master the specific definitions and differences between web technologies (especially HTML vs XML and URL vs Domain Name) to secure full marks in the theoretical section of the board exam.

In this video, we cover:

✅ Core Web Concepts:
WWW (World Wide Web): The system of interlinked hypertext documents invented by Tim Berners-Lee.
HTML vs. XML: The most important comparison.
HTML: Used for designing and displaying data (Predefined tags, not case-sensitive).
XML: Used for storing and transporting data (User-defined tags, case-sensitive).

✅ Addressing & Identification:
Domain Name: The human-readable name of a website (e.g., `google.com`).
URL (Uniform Resource Locator): The complete address to locate a resource, including protocol and path (e.g., `https://google.com/search`).

✅ Web Infrastructure:
Web Browser: The client-side software used to request and view pages (e.g., Chrome, Firefox).
Web Server: The server-side software/hardware that stores pages and responds to requests 24/7 (e.g., Apache).
Web Hosting: The service that provides space and connectivity to make a website available online.

✅ PYQs on Web Services

📚 Quick Revision Notes:

HTML vs XML: If it's about Appearance/Display → HTML. If it's about Data Transfer/Structure → XML.
URL: Think of it as the "Full Postal Address." It tells the browser where to go and how to get there.
Web Hosting: The service that keeps the website "Live" 24/7.

Exam Tip:
The "Difference between HTML and XML" is a repeat candidate for 2-mark questions! Memorize at least two points (Purpose and Case Sensitivity). Also, don't forget the full forms of URL, WWW, and XML.

📚 About this Course:
This "Quick Revision Series" is designed for CBSE Class 12 Computer Science students who want to cover the entire syllabus efficiently.

We focus on:
• Concept Clarity in minutes.
• Previous Year Questions (PYQs) integration.
• Exam-oriented tips and tricks.

🎓 Don't miss a single topic! Access the full ALL-IN-ONE course here: 👉

🔔 Next Video: We will see case study questions from previous years:

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⏱️ Timestamps:
00:00 - Intro & Topic Overview
00:41 - WWW, HTML & XML Explained
02:00 - Domain Name vs URL
02:52 - Web Browser, Server & Hosting
04:58 - PYQs: URL Definition & Full Forms
06:39 - PYQs: Web Hosting & Browser Names
07:42 - PYQ: Difference between URL & Domain Name
09:03 - PYQ: Difference between HTML & XML
11:21 - Summary & Conclusion

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