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26. What is CDN? Why do we use it?

CDN stands for Content Delivery Network. It is a network of servers distributed across various locations globally, designed to deliver content to users from the nearest server to their geographic location.

We use CDN for the following reasons:

  1. Faster delivery: Since CDN serves content from a server closest to the user, it reduces the distance that data must travel. This results in faster delivery of content to the user.

  2. Scalability: CDNs are designed for scalability, meaning they can efficiently handle high amounts of network traffic without slowing down or crashing.

  3. Improved user experience: Fast loading times can satisfy users, encourage them to stay longer on the website, and reduce bounce rates.

  4. Reducing server load: By offloading static asset delivery to a CDN, we free up server resources, improve loading times, and reduce the risk of server crashes or downtime.

In essence, CDNs provide a highly efficient way to deliver static content to users, making websites faster and more reliable.