The document discusses different types of cloud infrastructure: private, public, and community. Private cloud infrastructure is operated solely for one organization, which may manage it themselves or use a third party, and it may exist on or off premises. Community cloud infrastructure is shared by several organizations within a specific community and supports shared concerns. Hybrid cloud infrastructure combines two or more cloud types that remain separate entities but are connected through technology enabling application portability. Public cloud infrastructure is available to the general public and owned by an organization selling cloud services.

13. The Cloud infrastructure
is operated solely for an
organization.
It may be managed by
the organization or the
third party and may
exists on premises or off
premises.
The cloud infrastructure
is shared by several
organization and
supports a specific
community that has
shared concern.
The cloud infrastructure
is composition of two or
more cloud(private,
public, community) that
remain unique entities
but are bound together
by standardized or
proprietary technology
that enables and
application portability.
The cloud infrastructure
is made available to
general public or a large
industry group and is
owned by an
organization selling cloud
services.

15. Infrastructure as a service are online services that provide high-
level APIs used to dereference various low-level details of
underlying network infrastructure like physical computing
resources, location, data partitioning, scaling, security, backup etc.
Usually billed based on usage
Usually multi tenant virtualized environment
Can be coupled with Managed Services for OS and application
support

17. Platform as a Service or Application Platform as a Service or platform-
based service is a category of cloud computing services that provides a
platform allowing customers to develop, run, and manage.
Typically applications must be developed with a particular platform in
mind:-
 Multi tenant environment
 Highly scalable multi tier architecture

19. Software as a service (SaaS) is a software distribution model in which a
third-party provider hosts applications and makes them available to
customers over the Internet. SaaS is one of three main categories of cloud
computing, alongside infrastructure as a service (IaaS) and platform as a
service (PaaS).
Usually billed on usage
Usually multi tenant environment
Highly scalable architecture