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This subsection, deals with hybrid architecture issues of the cloud. Each cloud client or end user or employee of an organization accesses the operating system, software application, network, bandwidth, and storage via the internet, as shown in Figure 3.2.

Figure 3.2: Architecture of cloud computing environment.

The entire hybrid framework may be subdivided into two important layers [5] as cloud platform architecture (CPA) and cloud application architecture (CAA). In between the CPA and CAA layer, there is a connecting layer which is the cloud provider, which is associated with cloud APIs and is available in the internet-oriented business area of the IT industry. The significance of two layers is discussed below.