Cloud computing involves delivering computing services over the internet. It evolved from concepts in the 1950s but was popularized by Amazon's AWS in 2006. There are two client-server models - centralized, where all resources are on a single server, and distributed, where each client is self-sustained. Cloud components include clients (mobile, thick, thin), distributed servers across datacenters, and a central server for administration. Common cloud services are SaaS, PaaS, and IaaS, providing software, platforms, and infrastructure as a service. The cloud is popular due to reduced costs, customization, scalability, reliability, and security compared to local computing resources.

1. INTRODUCTION
TO

2. What is Cloud Computing?
Distributed computing on internet Or
delivery of computing service over the
internet.
Eg: Yahoo!, GMail, Hotmail-
Instead of running an e-mail program
on your computer, you log in to a Web e-mail
account remotely. The software and storage for
your account doesn't exist on your computer -- it's
on the service's computer cloud.

3. History
 Concept evolved in 1950(IBM) called
RJE (Remote Job Entry Process).
 In 2006 Amazon provided First public
cloud AWS(Amazon Web Service).
RJE of IBM

4. Client server models
There are two types of
client server model
namely DISTRIBUTED
& CENTRALISED. DISTRIBUTED
CENTRALISED

5. CENTRALISED
In a purely Centralized model,
all computing resources
reside at the single server.
This includes Domain
Authentication Services,
Email, Applications, and
Share File.

6. DISTRIBUTED
In a purely Distributed model,
each client is self-sustained
for the most part. While
some connectivity to the
primary datacenter is
required, the remote site
would host its own Email
Server, manage its own
backups, control its own
Internet access, and host
its own Shared Files.

7. Cloud Components
It has three components
1.) Client computers
2.) Distributed Servers
3.) Datacenters

8. Clients
Clients are the device that the end
user interact with cloud.
Three types of clients:
1.) Mobile
2.) Thick
3.) Thin (Most Popular)

9. Datacenter
It is collection of
servers where
application is
placed and is
accessed via
internet.

10. Distributed servers
Often servers are in
geographically different
places, but server acts as
if they are working next
to each other.

11. Central Server
It Administers the system such as monitoring
traffic, client demands to ensure everything runs
smoothly.
It uses a special type of software called
Middleware.
Middleware allow computer to communicate
each other.

12. Service Types
Following were the services
provided by cloud:
 SAAS(Software as a service)
 PAAS(Platform as a service)
 LAAS(Logging as a service)

13. SAAS
 Software as a Service (SaaS) is a
software distribution model in
which applications are hosted by
a vendor or service provider and
made available to customers over
a network, typically the Internet.
 Examples: Google apps,
salesforce,cisco webEX.

14. PAAS
 Platform as a service (PaaS) is
a cloud computing model that
delivers applications over the
Internet. In a PaaS model, a
cloud provider delivers
hardware and software tools .
 Examples: Google App Engine,
Windows Azure , Heroku.

15. LAAS
 Logging as a service (LaaS) is
an IT architectural model for
centrally ingesting and collecting
any type of log files coming from
any given source or
location;[1] such
as servers,applications, devices
etc.
 Example : Amazon web services,
Google compute engine, cisco
Metapod.

16. Deployment of Cloud
Service
Public Cloud
Private Cloud
Community Cloud
Hybrid Cloud(Combined Cloud)

17. Why cloud service is popular now?
 Reduce the cost.
 Customization.
 scalability, reliability, and efficiency.
 Info. at cloud are more secured.

18. Application
Social Networking sites.
E-mail sites.
Search Engines.
Many more services
OVER THE INTERNET.