Describe IT-as-a-Service. What are different aspects that cloud needs to deliver this (2)

Cloud computing introduces the concept of " IT-as-a-Service". Under this, any and every computing resource and tools can be availed as a service. To support this service, the cloud infrastructure must deliver the following 

• Abstraction: Alleviate IT consumers from the operations of applications, allowing end users to focus instead on the execution of high-value activities
• Virtualization- access to business services on-demand independent of location and resource constraints
• Dynamic allocation- Dynamically provisions, configures, reconfigures, and de-provisions IT capability as and when needed, transparently and seamlessly 
• Data Management-  Fast, secure, reliable data access and mobility, with integrated data protection and recovery management

In cloud deployment the effective and efficient data management becomes a critical since all data resides on the same shared storage