An Overview of Cloud Based Content Delivery Networks: Research Dimensions and State-of-the-Art - Transactions on Large-Scale-Data-and Knowledge-Centered Systems XX - page 152

The CoDaaS architecture consists of three layers namely the cloud layer, the content
service virtualizations layer and the security layer. The cloud layer comprises the hybrid
cloud from which resources are used to develop a content distribution overlay. It also
has a set of media rendering engines, managerial and service orchestration function. The
content service visualization does the operation of content distribution, processing,
storage and routing. This layer performs the function of a typical CDN. The security
Table 2. Commercial CDNs service analysis