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- [Speaker] The National Institute

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of Standards and Technology,

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or NIST,

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created a "Special Publication 800-145",

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which is called "The NIST
Definition of Cloud Computing".

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And it provides a standard
set of definitions

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for the different aspects
of cloud computing.

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First thing that I want
to actually go over

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is the different cloud deployment models.

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And that includes public cloud for,

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you know, open for public use,

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things like Google Cloud,
Azure from Microsoft,

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DigitalOcean, the Google Cloud
platform, and many others.

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You also have private cloud,

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which is actually used just
by the client organization,

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either on premise, or on-prem,
or at a dedicated area

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in a cloud provider.

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You also have community cloud,

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that is actually an environment

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that is shared between
several organizations,

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and thus the word community.

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Then you also have the hybrid cloud,

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which is composed of two
or more cloud services

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including on-prem services as well.

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Now, cloud computing
can be broken down into

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three basic models,

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Infrastructure as a Service,

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And that's basically a solution

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where you're renting the
infrastructure, right?

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You purchase the virtual
power to actually execute

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your software as needed

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and you can put your VMs or containers

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in an environment.

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And this model is actually
similar to a utility company

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because basically, you pay for
what you actually use, right?

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And examples of those are, again,

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the Amazon AWS

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and also, you know, Azure,
and Google Cloud platform,

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and many others.

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Now, Platform as a Service,

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it basically provides
everything accept application.

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So the services provided by this model

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includes all faces

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of the system development
life cycle, right?

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And can use

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application programmable
interfaces, right?

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APIs, right?

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You also have the ability
to use web portals

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or gateway software.

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And then basically you
just dedicate yourself

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on creating your application system,

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you know, on top of this system platform,

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thus the name Platform as a Service.

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Now, these solutions
tend to be preparatory,

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which can actually cause problems

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if the customer moves away
from the provider's platform.

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So in many cases, actually, you know,

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several customers would like
to have just their containers

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or their VMs actually instantiated

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in an Infrastructure as a Service.

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But one of the main benefits
of Platform as a Service

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is that you don't have to
worry about all that overhead

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and, you know, dedicated VM people,

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you know, to take care
of the infrastructure.

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You just dedicate it in there to develop,

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you know, your application.

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And the other one is the
Software as a Service, or SaaS.

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And SaaS is designed to provide
a complete package solution.

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Take a look for example, Cisco Webex,

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on where you actually pay for a service

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where you can actually
host your conference calls

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and, you know, many collaboration features

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that it has.

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But you don't have to,

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even take care of the
underlining infrastructure

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or the application.

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You know, basically you're
using the application,

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you know, directly from the provider,

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in this case, Cisco.

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Another one,

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another example is the
Office 365 from Microsoft

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or Google Drive,

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and Google Docs is another example

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of a Software as a Service.

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Now, NIST also has another
Special Publication,

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which is the "500-292",

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and it's the "Nist Cloud
Computing Reference Architecture".

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And it's another great resource

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to learn more about the
cloud architecture as well.