Cloud Computing

1. Service Models

1.1. Software as a Service (SaaS)

1.2. Platform as a Service (PaaS)

1.3. Infrastructure as a Service (IaaS)

2. Deployment Models

2.1. Private cloud

2.2. Community cloud

2.3. Public cloud

2.4. Hybrid cloud

3. Essential Characteristics

3.1. Broad Network Access

3.2. Resource Pooling

3.3. On Demand Self Service

3.4. Rapid Elasticity

3.5. Measured Service