Cloud computing allows users to access computer resources and applications remotely through the internet. There are three main types of cloud computing models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). IaaS provides remote access to computing infrastructure resources like storage and servers. PaaS allows users to deploy their own applications using tools supported by the cloud provider. SaaS delivers applications to users through a web browser or program interface without requiring downloads or installation. Cloud computing provides advantages like cost efficiency, high speed, accessibility from anywhere, and easy data backup and recovery, but also poses risks such as security issues, low bandwidth, lack of flexibility, and

1. Cloud computing
Paper Presentation
PRASANTH
GOVERNMENT ARTS
AND SCIENCE COLLEGE
ARIYALUR,
3rd Bsc-Computer Science

3. History
The cloud symbol was used to represent networks
of computing equipment in the original ARPANET
by as early as 1977,
 designed The word cloud was used as a metaphor
for the Internet and a standardized cloud-like
shape was used to denote a network on telephony
schematics.
In 2006 Amazon introduced its Elastic Compute
Cloud (EC2)
In 2008 Google App Engine
In 2010, Microsoft released Microsoft Azure,

5. SaaS - Example
The capability provided to the consumer is to use the provider's
applications running on a cloud infrastructure.
The applications are accessible from various client devices through
either a thin client interface, such as a web browser (e.g., web-based
email), or a program interface.
The consumer does not manage or control the underlying cloud
infrastructure including network, servers, operating systems, storage,
Even individual application capabilities, with the possible exception
of limited user-specific application configuration settings.
Saas provider Google drive,Facebook,G-Mail, DropBox, Youtube,
amazondrive, compology, JioCloud

6. PaaS
The capability provided to the consumer is to deploy onto the cloud
infrastructure consumer-created or acquired applications created using
programming languages,
libraries, services, and tools supported by the provider.
The consumer does not manage or control the underlying cloud
infrastructure including network,web servers, operating systems, or
storage,server,data base,
but has control over the deployed applications and possibly
configuration settings for the application-hosting environment.
With some PaaS offers like Microsoft Azure, Oracle Cloud Platform
and Google App Engine,

7. IaaS
"Infrastructure as a service" (IaaS) refers to 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,
A hypervisor, such as Xen, Oracle VirtualBox, Oracle VM, KVM, VMware
ESX/ESXi, or Hyper-V, LXD, runs the virtual machines as guests.
IaaS clouds often offer additional resources such as a virtual-machine disk-
image library, raw block storage, file or object storage, firewalls, load
balancers, IP addresses, virtual local area networks (VLANs), and software
bundle
IaaS-cloud providers supply these resources on-demand from their large pools
of equipment installed in data centers. For wide-area connectivity,

8. Deployment models
Private
Private cloud is cloud infrastructure
operated solely for a single
organization,
Public
A cloud is called a "public cloud"
when the services are rendered over a
network that is open for public use.
Public cloud services may be free.
Hybrid
Hybrid cloud is a composition of two or more clouds (private, community
or public), A hybrid cloud is a computing environment which combines a
public cloud and a private cloud by allowing data and applications to be
shared between them.

9. Cloud computing Advantages
Cost efficiency – The biggest reason behind shifting to cloud computing is
that it takes considerably lesser cost than an on-premise technology. Now the
companies need not store the data in disks anymore as the Cloud offers
enormous space available saving money and resources of the companies.
High Speed – Cloud computing lets you deploy the service quickly in fewer
clicks. This quick deployment lets you get the resources required for your
system within fewer minutes.
Excellent accessibility – Storing the information in cloud allows you to access
it anywhere, anytime regardless of the machine making it highly accessible and
flexible technology of present times.
Back-up and restore data – Once the data is stored in Cloud, it is easier to get
the back-up and recovery of that, which is quite a time taking process on-
premise.

10. Cloud computing Disadvantages
Security issues – At time storing data in cloud may pose serious challenge of
information theft in front of the company. Though advanced security measures
are deployed on cloud, still storing a confidential data in cloud can be a risky
affair.
Low bandwidth – At times the bandwidth is low as many users are accessing
cloud at the same time which causes its bandwidth to go down. With less speed
the benefits of cloud computing cannot be realized.
Flexibility issues – The cloud services run on remote servers which make it
hard for the companies to have control over software and hardware. The services
at times do not run the way it should.
Incompatibility – Since entire infrastructure gets virtualized, incompatibility
issues may arise at times that may pose serious challenges on the way of smooth
running of services.

11. Thank you

12. Any qustion