Cloud computing allows users to access shared computing resources like software, storage, and servers over the internet. It has three main types of services: Infrastructure as a Service (IaaS) provides basic computing and storage; Platform as a Service (PaaS) supplies tools to build apps; and Software as a Service (SaaS) delivers apps through a web browser. Clouds can be public, used by anyone, private for a single organization, or hybrid using both. Cloud computing offers advantages like reduced costs, scalability, and accessibility but also poses challenges regarding security, performance, and vendor dependence.

1. CLOUD COMPUTING

2. Cloud computing is Internet-based computing, whereby
shared resources, software, and information are provided to
computers and other devices on demand through the
Internet.
What is Cloud Computing ?

3. So what is the cloud?
.

5.  The front end is the part seen by the client, i.e. the computer
user. This includes the client’s network (or computer) and the
applications used to access the cloud via user interface such as
a web browser.
 The back end is the ‘cloud’ itself, comprising various computers,
servers and data storage devices.
Components of cloud computing
architecture

6.  IaaS
 PaaS
 SaaS
Types of Cloud Services

7. Sometimes referred as HaaS or Hardware as a Service and it
involves both storage services and computing power.
Provides user computing resources and storage comprised with
many servers as an on-demand and “pay per use” service:
Data Center, Bandwidth, Private Line Access, Servers and Server
Room, Firewall, Storage space …..
Examples:
Amazon：EC2 (ElasticComputeCloud)
Rackspace: www.rackspace.com
Infrastructure as a Service (IaaS)

8. Applications or software is delivered as a service to the
customer who can access the program from any online device,
eliminating the need to install and run the application on the
customer's own computers and simplifying maintenance and
support.
Some of these Web-based applications are free such as
Hotmail, Google Apps, Microsoft office, Facebook
Software as a Service (SaaS )

9.  Services are fully managed and hosted;
 Have regular recurring payments ;
 Allow for anytime, anywhere access (usually 24/7 services)
 Have multiple tenants on servers;
 Don’t require installation of specialized software ;
SaaS can be defined through five
key ideas

10. With PaaS, computing platform provides supplies tools and a
development environment to help companies build, test, and
deploy Web-based applications.
Bundles all stack components (hardware, infrastructure,
storage) together with database, security, workflow, user
interface, and other tools that allow users to create and host
powerful business applications, web sites, and mobile apps.
Examples
Sales force http://www.force.com
800APP http://www.800app.com
Platform as-a-Service (PaaS)

11.  Public clouds
 Private cloud
 Hybrid cloud
Public clouds computing environment are open for use to
anyone who wants to sign up and use them. These are run
by vendors and applications from different customers are
likely to be mixed together on the cloud’s servers, storage
systems, and networks.
Examples of a public cloud: Amazon Web Services and
Google's AppEngine
Cloud computing types

12. private cloud is a cloud network created and contained within
a company's own system. It allows the company to maintain
complete control over its data while still accessing some of the
benefits of a cloud service.
Examples :Seasia infotech
Amazon Virtual Private Cloud (Amazon VPC)
Cisco Private Cloud solutions
hybrid cloud the majority of businesses have some data that
they need to keep on-premises and some data that requires
the scalability of the public cloud. The hybrid cloud refers to
this kind of setup, where some data is stored in a public cloud
and other critical data is kept in the private cloud.
Examples : NetApp® Cloud Solutions , USA Hybrid
Cloud Hosting

13. Log-in to the online storage account
Click upload a file
Find the file on hard drive, network, or external storage
Upload to cloud storage
Upload Documents
5 GB
5 GB
2 GB
7 GB

14.  Backup and Disaster Recovery
 Maintainess Cost is less
 Ease of Access (According to permissions Granted)
 Almost Unlimited Storage
 Cost Efficient
Advantages of Cloud Computing

15.  Security
 Vendor trust
 Performance
 Database Location
 Control
Challenges

16.  Prone to Viruses,Malwares,Spywares
 Security in the Cloud
 Technical Issues
Disadvantages of Cloud Computing