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CDN (Content Delivery Network)

Last Updated: 10th September, 2026

Imagine your website is hosted in India ????????

Now a user from the USA ???????? opens it…

What happens?

  • Data travels thousands of kilometers
  • Website loads slowly
  • User leaves

Now instead… your content is already stored near the user

Website loads instantly
No delay
Better user experience

That’s the power of a CDN

fog vo (1).png

What is CDN?

Content Delivery Network (CDN) is a network of distributed servers located across the world.

It delivers content to users from the nearest server (edge location)

How CDN Works

  1. User requests a file (image, video, website)
  2. CDN checks if content is cached nearby
  3. If yes → delivers instantly
  4. If no → fetches from origin server and caches it

What Content Does CDN Store?

  • Images
  • Videos
  • CSS & JavaScript files
  • Website static content

Without CDN vs With CDN

Feature

Without CDN

With CDN

SpeedSlow (long distance)Fast (nearby server)
LatencyHighLow
Server LoadHighReduced
User ExperiencePoorSmooth

Technical Example (Enable CDN in GCP)

gcloud compute backend-buckets create my-backend-bucket \
  --gcs-bucket-name=my-bucket

gcloud compute backend-buckets update my-backend-bucket \
  --enable-cdn

This enables CDN for your storage bucket

1. Video Streaming Platforms

  • Deliver videos globally without buffering

2. E-commerce Websites

  • Fast loading product images
  • Better user experience

3. News Websites

  • Handle heavy traffic instantly

4. Gaming Platforms

  • Low latency for players worldwide
Module 2: Core GCP ServicesCDN (Content Delivery Network)

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