Web Systems Overview

Web Systems Overview

• Web systems combine tools and platforms for creating, deploying, and managing websites and applications.
• Key components include Front-end, Back-end, Database, and Hosting.

Front-End

• Front-end is the visual part users interact with, encompassing design and content.
• Key technologies:
  • HTML structures the webpage with elements like headings and links.
  • CSS styles the webpage, controlling colors, fonts, and layouts.
  • JavaScript adds interactivity, enabling features like form validation and dynamic updates.

Back-End

• Back-end operates behind the scenes, managing server-side logic and data processes.
• Handles tasks such as user authentication during logins by checking credentials.
• Ensures website functionality and smooth operation for users.

Database

• Databases store critical data for web applications, including user accounts and transactions.

Hosting

• Hosting provides the server infrastructure needed for websites to be accessible on the internet.

Evolution of the Web

• WEB 1.0: Characterized by static HTML pages, limited interaction (e.g., GeoCities).
• WEB 2.0: Introduced user-generated content and dynamic interactivity (e.g., Facebook, Twitter).
• WEB 3.0: Focuses on decentralization and AI, utilizing blockchain technology (e.g., DApps).

Websites Defined

• A website is a collection of linked web pages accessible via the internet, likened to a digital book with chapters.
• Websites serve diverse purposes including information retrieval, video watching, and online shopping.

Website Functionality

• Websites function by exchanging information with servers over the internet.
• User input, such as typing a URL, triggers a request to the server, which responds by delivering the requested page almost instantly.