Over the internet, it gives us means of accessing the applications as utilities. It acknowledges us to create, configure, and customize an application online.
What is Cloud?
The word Cloud means Network or Internet or we can say that it is something, which is available at the remote location. It gives us services to the public and the private networks, i.e.LAN, WAN.
What is Cloud Computing?
It means to manipulate, configure, and access the hardware and software stuff remotely. It suggests online storage of data, fundamental, and application. Applications like web conferencing, e-mail, customer relationship management (CRM) execute on the cloud.
Basic Concepts of Cloud Computing
To make cloud computing possible and available to the customer.There are many services and models working.
Cloud computing models are:
Deployment Models
ServiceĀ  Models

Deployment Models
It explains the kind of access to the cloud. Cloud has four kinds of access: Public, Private, Hybrid, and Community.
PUBLIC CLOUD MODEL
Systems and services easily accessible to the public because of its openness. It may be less secure.
PRIVATE CLOUD MODEL
Within an organization system and services accessible because of its private nature, it is more secure.
COMMUNITY CLOUD MODEL
Systems and services accessible by a group of organizations.
Cloud Computing Service Models
There are three basic service models-
Infrastructure-as-a-Service (IaaS)
Platform-as-a-Service (PaaS)
Software-as-a-Service (SaaS)
Anything-as-a-Service (XaaS) is still another service model, which add Business-as-a-Service, Network-as-a-Service.
Identity-as-a-Service, Strategy-as-a-Service or Database-as-a-Service.
The Infrastructure-as-a-Service (IaaS) is the best key level of service. All of the models (service) acquire the management and security mechanism
from the basic model, as shown in the diagram:
Cloud Computing Service Models
INFRASTRUCTURE-AS-A-SERVICE (IAAS)Model
IaaS gives a way to the basic assets like virtual storage, physical machines, virtual machines.
PLATFORM-AS-A-SERVICE (PAAS)Model
PaaS gives the runtime environment
SOFTWARE-AS-A-SERVICE (SAAS)Model
As a service to end-users SaaS model grant to use software applications.