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AWS CERTIFICATION EXAMCloud Computing - Answers -Remote virtual pool of on-demand shared resources
offering compute, storage, database, and Network services that can be rapidly deployed
at scale.
Virtualization - Answers -Allows the possibility of having multiple virtual machines each
running on separate operating systems and applications, installed on 1 physical server.
Hypervisor - Answers -Is a piece of software used to create the virtualized environment
allowing for multiple VMS to be installed on the same host.
What are the benefits of Cloud Computing? (7 Total) - Answers --Reduced capital
expenditure
-Less hardware required
-Reduced operating costs
-Less space, power, and cooling (air conditioning)
-Smaller footprint
-Optimization of resources
-Handled by Cloud vendor & consumer
What are the three cloud deployment models? - Answers -Public, Private, and Hybrid
Public - Cloud Deployment Model - Answers -A vendor makes available the use of
shared infrastructure:
-Storage
-Network
-Database
-Compute
,-Consumers can specifically choose the geographic region in which it resides to aid with
data access latency based on where the end users are located.
-However - they will never see (physically) where their data sits.
Private - Cloud Deployment Model - Answers -The cloud can only be accessed, hosted,
and managed by the individual. company using it.
-Direct control of all data.
-To maintain for tight security reasons
-Hardware is held on-premise - wherever that company is located.
-More capital expenditure is required to host the datacenter
-As well as day-to-day operations needed to maintain equipment.
-Cooling
-Maintenance
-Space
Hybrid - Cloud Deployment Model - Answers --Both public + private
-Can be used for seasonal burst traffic
-Or for Disaster Recovery
-Usually for short-term configurations and can often be used for transitional states for
enterprises.
On-Demand Resourcing - Answers --When you want to provision a resource within the
cloud, it's almost immediately available to allocate where/when you need it.
-No waiting for cables to be ordered, installed, or configured
Scalability - Answers -Cloud computing offers you the ability to rapidly scale your
environments/ resources to move up/down or in/out.
Scaling up/down alters the power/performance of the virtual machines
For example) CPU/Memory Power
Scaling in/out is adding/removing virtual machines in resources.
, Utility Based Metering - Answers -Only pay for what you use.
-2 hours of running instance = 2 hours worth of resources
-This data gets replicated as well in different regions for backup/storage.
Why are cloud vendors more secure than (physical) data centers? (2 main reasons) -
Answers --Must comply to global compliance programs across multiple industries
-Shared responsibility model - holds everyone accountable.
What are the three cloud service models? - Answers -Saas (Software as a Service),
Paas (Platform as a Service), and Iaas (Infrastructure as Service).
Saas - Answers -Allows for the delivery and application that can be widely distributed
and accessed.
-For example - Gmail
-Fully managed/accessed over the internet.
-No requirements to install any software on your local device.
-Usually very simple in design focusing on ease - to appeal to a wider audience.
Paas - Answers -PaaS providers give a greater level of management and control.
-Access to a framework from the operating system and up.
-Architecture, host hardware, network components and OS are typically managed by
the vendor.
-Makes for a great deployment service for developers.
-Provides you the operating system for editing/applying within the service.
Iaas - Answers -Highest level of customization and management
Allows you to architect your own portion of the cloud, by configuring a virtual network.
-These are segmented from other networks allowing you to deploy any resources you
need.
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