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Thursday, April 24, 2008

CDN - Content Delivery Networks

CDNs (Content Delivery Networks) are becoming more popular in organizations looking for ways to effectively reduce travel and training costs. CDNs offer a way to distribute training, announcements and regulatory mandated deliverables (HR announcements, etc) to the employee population via streaming video content. The video content can be flash, windows media, quicktime, or live video.

In California, every organization is tasked with regulatory requirements around sexual harassment training, and one way to fulfill this and keep track that everyone has taken the training, is through a CDN that is delivered by a proxy. The proxy keeps track of authentication, to log who has taken the training, and gives the ability to save the bandwidth required to send the video content around the network, as well as offload the server serving the video content.

The proxy offers authentication and logging capabilities for compliance, caching of video for bandwidth savings, stream splitting at remote locations for additional bandwidth savings, and caching of video that reduces the load on the video server. Sounds like a win-win situation, right? Unfortunately, not every proxy will support CDN's so you'll need to shop around and find the one that has the features that your organization needs.

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