Cloud computing allows users to access computer services over the internet rather than locally. It provides agility, scalability, and elasticity by allowing on-demand access to resources without needing to own the physical infrastructure. While upfront costs are reduced, security depends on providers' capabilities. Key advantages include easy integration with other applications and services, simplicity of not needing installed software, and lower investment requirements. However, information must pass through multiple nodes, increasing security risks, and reliability depends on providers' stability.

1. CLOUD
COMPUTING

2. WHAT IS CLOUD COMPUTING?
• Is a computer service that allows to offer computer services
through a network that is Internet.

3. CLOUD FEATURES
• Agility:
• Capacity for improvement to offer technological resources to
the user by the provider.

4. COSTS
• Cloud computing providers claim that costs are reduced. A
model of public provision in the cloud converts capital
expenditures into operating expenses. This reduces barriers to
entry, as the infrastructure is typically provided by a third
party and does not have to be purchased just once or
infrequent intensive computing tasks.

5. SCALABILITY AND ELASTICITY
• Resources on a self-service basis almost in real time, without
users needing high-end loads.
• So fast!

6. INDEPENDENCE BETWEEN THE DEVICE
AND THE LOCATION
• Allows users to access systems using a web browser,
regardless of their location or the device they use for example,
PC, mobile phone.

7. PERFORMANCE
• The systems in the cloud control and optimize the use of
resources automatically, this feature allows monitoring,
control and notification thereof. This capability provides
transparency for both the consumer or the service provider.

8. SECURITY
• Security is often as good or better than other traditional
systems, in part because providers are able to devote
resources to solving security problems that many customers
can not afford to address. The user of the cloud is responsible
for security at the application level. The cloud provider is
responsible for physical security.

9. MAINTENANCE
• Cloud computing applications are simpler, since they do not
need to be installed on each user's computer and can be
accessed from different places.

10. IMPORTANT ADVANTAGES
• Number One : Proven integration of network services. By its nature,
cloud computing technology can be integrated much more easily and
quickly with the rest of business applications (both traditional software
and infrastructure-based Cloud Computing), whether they are
developed internally or external
• Number Two: A 100% cloud computing infrastructure also allows the
provider of content or services in the cloud to dispense with installing
any type of software, as this is provided by the provider of the
infrastructure or the platform in the cloud. A great benefit of cloud
computing is the simplicity and the fact that it requires much less
investment to start working.

11. IMPORTANT DISADVANTAGES
• Numer One : The information of the company must go
through different nodes to reach its destination, each of them
are a source of insecurity. If you use secure protocols, HTTPS
for example, the total speed decreases due to the overhead
they require.
• Number Two : The reliability of the services depends on the
technological and financial "health" of the cloud service
providers. Emerging companies or alliances between
companies could create an environment conducive to