Service Models of the Cloud
For my blog post I chose to work on
Domain 1.8 which is to Summarize cloud concepts and connectivity options-
Service Models. There are many different types of
service models. A few larger scaled models are Software as a service (SaaS),
Infrastructure as a service (IaaS), Platform as a service (PaaS), and Desktop
as a service (DaaS).
Software as a service is a model
that replaces traditional software that is installed on the device and is ran
over the cloud instead through a paid licensed subscription on the web. The
vendor has full control over the server as it is keeping the details hidden
from the consumer. Typical SaaS we deal
with is services such as Microsoft Office 365, ServiceNow, and Dropbox.
Platform as a service is a lower
service model than SaaS due to being a platform that is used as cloud space to
develop, test, and classify applications for the consumer. The consumer may ask
for resources as needed. This cloud model requires a subscription to be ran. An
example of PaaS is Google App Engine and AWS Elastic Beanstock.
Infrastructure
as a service is the model that allows the consumer to virtually rent servers,
networks, and virtual data centers with full access and capability, making this
the most flexible model for both consumers and vendors. This is also very cost
effective as there in no physical space or maintenance that needs to be
managed. Popular IaaS’s are Microsoft Azure Labs and Amazon Web Services.
Below is a figure of how these 3
cloud models intertwine and differ in their responsibilities for the customer
and vendor.
Finally, Desktop as a service. This model is not as widely
used as the first the mentioned but is still common. This cloud model is a
virtual desktop for the consumer over the internet with a paid subscription.
There are two types of desktops, persistent and non-persistent. Persistent
desktops give the consumers ability to customize and save the desktop, so the
information is obtainable at different times. This requires more maintenance
and is more costly than non-persistent desktops. Non-persistent desktops wipe
out data after every use.
References
2.
https://www.doi.gov/cloud/service
3.
https://www.vmware.com/topics/glossary/content/desktop-as-a-service
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