How do Content Delivery Networks (CDNs) improve website performance for global visitors?

Question

Content Delivery Networks (CDNs) fundamentally enhance website performance for a global audience by leveraging a geographically distributed infrastructure. At their core, CDNs consist of a network of servers strategically placed in various data centers around the world. When a user requests content from a website that utilizes a CDN, the request is directed to the server closest to that user's physical location. This proximity is paramount in reducing the physical distance data must travel, a factor that directly impacts latency.

Accepted Answer

This distributed architecture facilitates efficient content caching. Websites store static assets, such as images, videos, CSS files, and JavaScript, on these edge servers. Instead of every user having to fetch these assets from the origin server, which could be located on a different continent, they retrieve them from a local CDN server. This process significantly shortens the path between the user and the content, resulting in dramatically faster page load times. For instance, a user in Sydney accessing a website hosted in New York will experience much quicker loading if the CDN has an edge server in Sydney compared to fetching all assets directly from New York.

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How do Content Delivery Networks (CDNs) improve website performance for global visitors?

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