1.WHAT IS CLOUD COMPUTING ?
It is more than anything on the internet and also more than
virtualization technologies. The concise definition put forth by the National
Institute of Standards and Technology (NIST) is
cloud computing is a model for
enabling ubiquitous, convenient, on-demand network access to shared pool of
configurable computing resources (e.g. networks, servers, storage, application and services)
that can be rapidly provisioned and released with minimal management effort or
service provider interaction.
2. WHAT ARE THE CHARACTERISTICS
OF CLOUD COMPUTING?
NIST's five essential characteristics
of cloud computing provides enough specifics to break the myth that "the internet equals the cloud". Neither simple web hosting nor virtualized data centers deliver the following comprehensive cloud benefits:
1. On-demand self-service
2. Broad network access
3. Resource pooling
4. Rapid elasticity
5. Measured Service
3. WHAT ARE THE
SERVICE MODELS AVAILABLE?
1. Infrastructure as a Service (Iaas)
2. Platform as a Service (PaaS)
3. Software as a Service (Saas)
The other two service model apart from the standard service
models are:
4. Data as a Service (Daas)
5. Business Process as Service (BPaaS).
Cloud computing environment fall into one of four different
models mentioned below:
a. Public Cloud
b. Private Cloud
c. Community cloud
d. Hybrid cloud
5. WHAT ARE THE RISKS
INVOLVED IN CLOUD COMPUTING?
Many foresee 'Security of data' as a major risk involved in
cloud computing.
Multitenancy may bring performance issue.
6. WHAT ARE THE
ADVANTAGES OF CLOUD COMPUTING BEYOND COST SAVINGS?
1. Reduced resource needs
2 .Reduced time to market
3. Reduced capital expenditure
4. Increased availability
5. Cost transparency