When first defining the cloud, NIST gave three service models, which can be viewed as nested service alternatives: software as a service, platform as a service, and as a service.

Infrastructure.

Explanation:

In Computer science, Cloud computing can be defined as a type of computing that requires shared computing resources such as cloud storage (data storage), servers, computer power, and software over the internet rather than local servers and hard drives. It offers individuals and businesses a fast, effective and efficient way of providing services.

Simply stated, Cloud computing are services or programs located on the Internet, they are usually remote resources making use of cloud storage.

When first defining the cloud, National Institute of Standards and Technology (NIST) gave three (3) service models, which can be viewed as nested service alternatives;

1. Software as a Service (SaaS).

2. Platform as a Service (PaaS)

3. Infrastructure as a Service (IaaS).

According to NIST, the five (5) characteristics of a cloud computing service are;

1. On-demand self-service .

2. Broad network access .

3. Resource pooling .

4. Rapid elasticity .

5. Measured service.

Additionally, the cloud service can either be deployed as private, public, hybrid or community service.