Content Delivery Networks – CDN

CDN content delivery network distribution file access across server

A Content Delivery Network (CDN) is a distributed network of servers that are used to deliver content to end-users based on their geographic location. CDNs are designed to speed up content delivery, reduce latency, and improve the user experience. In this essay, we will discuss the benefits and problems of using a CDN.

Benefits of using a CDN:

  1. Faster Load Times:

One of the primary benefits of using a CDN is faster load times. CDNs distribute your content across multiple servers located in different geographic regions. This means that users can access your content from a server located closer to them, reducing the distance and time it takes to load the content.

  1. Better User Experience:

A faster load time translates into a better user experience. Users are more likely to engage with your website or application if it loads quickly. This can lead to higher engagement rates, longer session times, and ultimately, increased revenue.

  1. Improved SEO:

Google considers website load time as a ranking factor. A faster load time can improve your website's search engine rankings, leading to increased traffic and revenue. CDNs also provide better performance, reducing the likelihood of users bouncing from your website, which can also have a positive impact on your SEO.

  1. Scalability:

CDNs are designed to handle high traffic volumes, making them ideal for websites and applications that experience high traffic volumes. The CDN can distribute traffic across multiple servers, ensuring that your website or application remains available even during traffic spikes.

  1. Reduced Bandwidth Costs:

CDNs can help reduce bandwidth costs by caching your content and distributing it across multiple servers. This reduces the amount of bandwidth that is required to deliver content to end-users, which can help reduce costs, particularly for websites and applications with high traffic volumes.

Problems of using a CDN:

  1. Cost:

While CDNs can help reduce bandwidth costs, they can be expensive to implement, particularly for smaller websites and applications. CDNs charge based on usage, which can quickly add up, especially for high traffic volumes.

  1. Complexity:

Implementing a CDN can be complex, particularly for those with limited technical knowledge. Configuration and management of a CDN can be challenging, which can result in configuration errors that can impact the performance of your website or application.

  1. Security:

While CDNs can improve the performance of your website or application, they can also introduce security vulnerabilities. Attackers can exploit vulnerabilities in the CDN infrastructure to launch DDoS attacks or steal sensitive data.

  1. Cache Inconsistency:

CDNs cache content on their servers to improve performance. However, cache inconsistency can occur when the content on the origin server is updated, but the CDN has not yet updated its cache. This can result in users seeing outdated content, leading to a poor user experience.

  1. Reduced Control:

Using a CDN means that you are relying on a third-party to deliver your content. This can reduce your level of control over the delivery of your content. For example, you may not have complete control over the distribution of your content or the ability to troubleshoot performance issues.


In conclusion, using a CDN can provide numerous benefits for websites and applications. CDNs can improve load times, user experience, scalability, and reduce bandwidth costs. However, CDNs can also introduce problems such as cost, complexity, security vulnerabilities, cache inconsistency, and reduced control. Before implementing a CDN, it is essential to carefully consider the benefits and problems and evaluate whether a CDN is the right solution for your website or application.

We hope this article has cleared up any questions you may have about CDNs. Some of our customers use them and some don't - this depends on traffic volume and other factors. Please contact us if you need more information.


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About the author 

Keith Rowley MBA BSc (Hons)

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