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Module II: Browser and Apache Web Server Architecture

20232m

Explain the role of web browser.

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A web browser is client software that lets a user request, retrieve, and view web resources.

  • Sends requests: builds HTTP/HTTPS requests for a URL and sends them to the web server.
  • Receives responses: downloads the HTML, CSS, JavaScript, images, and other resources.
  • Renders pages: parses HTML into the DOM and CSS into the CSSOM, then lays out and paints the page.
  • Runs scripts: executes JavaScript through its engine (e.g. V8) to make pages interactive.
  • Manages state and security: stores cookies, cache, and history, and enforces the same-origin policy and TLS.

Examples: Chrome, Firefox, Safari, Edge.

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