Soaring usage of the Internet has drastically impeded the performance of popular web services due to heavy congestion of web traffic. No doubt, the demand for web services has grown by leaps and bounds, causing unmanageable levels of traffic flow. This causes the negligence of requests received by websites. An abrupt spike in web content requests may put additional strain on a web server, and as a result websites carrying the content becomes momentarily inaccessible. However, content providers use the web as a source to deliver flawless content to their users. A decrease in the speed of content delivery and application accessibility caused by long download times makes users frustrated. For companies, access delays and decrease in service quality can adversely affect their financial status and hence, they aren’t compromised with the service quality of their websites. Fortunately, the past few years have seen a massive improvement when it comes to content delivery and service provisioning over the web with the emergence of cloud CDN hosting service.

With the introduction of cloud CDN, content providers have started hosting their websites on a CDN. This provides them with an opportunity to reap the benefits of reliability and scalability without the need to maintain expensive infrastructure. It is interesting to note that cloud CDN hosting providers guarantee a prompt delivery of digital content for end-users. They provide space for third-party content compromises of static content, streaming media, User Generated Content and varying content services. For those who don’t know, large enterprises, web service providers, media organizations and news agencies are primary providers of content to cloud CDN providers.

As far as the cost is concerned, providers of cloud CDN hosting charge their customers on the basis of content delivered to end-users by their proxy servers. There is a revelation that every cloud CDN facility is enabled with an accounting mechanism that gathers and traces client usage information in terms of request-routing, distribution and delivery. This mechanism collects information in real time in order for using it in cloud CDN for accounting, billing and maintenance purpose. No doubt, the cost of cloud CDN hosting service is relatively high, but medium and large enterprises can afford it quite easily to reap its benefits. The inevitable reasons increasing the price of cloud CDN services include:

- Bandwidth cost

- Frequent change in traffic distribution

- Amount of duplicate content hosted on the proxy servers

- Number of proxy servers used

- Reliability and stability of the whole system of content delivery.     

Despite associated with relatively high service cost, companies availing cloud CDN can certainly benefit from scalability, security and reliability of content delivery with ease.