Cloud 101: Deployment Models

Cloud Deployment models are of three types:

Private Cloud

Cloud infrastructure operated solely for a single organization.
It is managed internally or by a third-party, and hosted either internally or externally.
This model offers the versatility and convenience of the cloud, while preserving the management, control and security common to local data centers.
Self-run data centers are generally capital intensive.
They require allocation of space, hardware, and environmental controls.
These assets have to be refreshed and checked periodically, resulting in additional capital expenditures, which has been much criticized.
It has Single tenant architecture.
HPE, Microsoft, OpenStack, VMWare, Dell, RedHat.

Services are rendered by third party provider over a network that is open for public use.
May be free to use.
No server needs to be set up on-premise.
Multi-tenant Architecture.
Pay-as-go model.
Security, Storage. application services are provided.
Amazon Web Services(AWS), Microsoft Azure, Google Cloud etc.

Mix of On-premise, private and third party public cloud services.
Has benefits of both public and private clouds.
Cloud bursting capabilities.
It allows one to extend either the capacity or the capability of a cloud service, by aggregation, integration or customization with another cloud service.
or example, Companies can run critical workloads or sensitive applications on the private cloud and use the public cloud to handle workload bursts or spikes in demand.
Embraces multicloud model.

The above points are basic ones to get an overview. I will explain them in details in upcoming posts!

References: 

https://en.wikipedia.org/wiki/Cloud_computing#cite_note-nist-56

https://searchcloudcomputing.techtarget.com/definition/cloud-computing