ABSTRACT
Cloud computing services are offered by cloud computing providers, so that cloud customers can take advantage of the benefits of cloud computing and help them achieve their goals. Cloud providers offer various services, and the cloud services may also be deployed and presented in different methods. Cloud providers allocate physical resources, logical resources, or both to their customers (some examples of resources are processing memory, storage, network bandwidth, virtual machines, software, etc.), but in general cloud computing services have the following common characteristics, as illustrated in Figure 15.2:
1. Cloud services and resources can be accessed easily by customers and users through a network such as the Internet.
