AWS CLOUD PRACTITIONER CERTIFICATION NOTES
What is Cloud Computing?
On-demand delivery of compute power, database storage, applications, and other IT
resources through a cloud services platform via the Internet with pay-as-you-go-pricing.
- A cloud services platform provides rapid access to flexible and low-cost IT resources
- Pay for what you use model.
Six Advantages of Cloud Computing
• Trade capital expense for variable expense – No need to heavily invest in data
centres or servers
• Benefit from massive economies of scale – Lower variable cost, usage by hundreds of
thousands of customers aggregated in the cloud. Translates into lower pay-as-you-go
prices
• Stop guessing capacity – Can access as much or as little capacity as you need, scale
up and down as required
• Increase speed and agility – Reduce time needed to make those resource available to
your developers. Lowers cost and time to experiment and develop.
• Stop spending money running and maintaining data centres – No need worry about
the infrastructure
• Go global in minutes – Easily deploy application in multiple regions around the world
with just a few clicks. Can provide lower latency and a better experience for
customers at minimal cost.
Types of Cloud Computing
Cloud Computing Models
Infrastructure as a Service (IaaS)
- Contains building blocks for cloud IT
- Typically provide access to networking features, computers (virtual or dedicated
hardware), data storage space
- Provides highest level of flexibility and management control over IT resources
Platform as a Service (PaaS)
- Removes the need for organisation to manage underlying infrastructure (hardware
and OS)
- Allows you to focus on the deployment and management of your applications
- No need to worry about resource procurement, capacity planning, software
maintenance, patching, or any other undifferentiated heavy lifting involved in
running your application
,Software as a Service (SaaS)
- Provides a completed product that is run and managed by the service provider
- Refers to end-user applications
- Do not need to think about how the service is maintained or how the underlying
infrastructure is managed
- Example is web-based email which you can use to send and receive email without
having to manage feature additions to the email product or maintain servers and OS
the email program is running on.
Cloud Deployment Models
Cloud
- Fully deployed in the cloud and all parts of the application run in the cloud.
- Can be build on low-level infrastructure pieces or can use higher level services that
provide abstraction from the management, architecting, scaling requirements of
core infrastructure.
- Benefits of cloud computing
o Agility → easy access to a broad range of technologies
o Elasticity → Scale resource up or down to fit business needs
o Cost Savings → Trade capital expenses for variable expenses. Pay for IT as
you consume. Variable expenses much lower because of economies of scale
o Deploy globally in minutes → AWS has infra all over the world.
Hybrid
- A way to connect infrastructure and applications between cloud-based resources to
existing resources that are not located in the cloud
- Connecting cloud resource to internal system
- Hybrid Cloud with AWS
o VMWare Cloud on AWS
▪ Scalable and secure service that allows organisations to seamlessly
migrate and extend their on-premises VMware vSphere-based
environments to the AWS Cloud, running on Amazon Elastic Compute
Cloud (Amazon EC2) bare metal infrastructure
o AWS Outposts
▪ A hybrid cloud solution that brings the same AWS stuff to virtually any
data centre, co-location space, etc.
▪ Can be used to support workloads that need to remain on-premises
▪ Used to ensure low latency and to support local data processing
needs.
- Uses Cases
o Data centre extension
o VMware cloud migration
, o Cloud services on-premises
o ISV and software compatibility
o Edge computing
On-premises
- Also known as private cloud
- Sought of its ability to provide dedicated resources.
- Use of virtualisation technologies to try and increase resource utilization
Global Infrastructure
- AWS Cloud Infrastructure is built around AWS Regions and Availability Zones
o An AWS Region is a physical location in the world where AWS has multiples
Availability Zones
o Availability Zones consist of one or more discrete data centres, each with
redundant power, networking, and connectivity housed in separate facilities.
o Availability allows you to operate with
▪ High availability
▪ Fault tolerance
▪ Scalability
o AWS Region → Availability Zones → Data Centres (House separately)
▪ AZ in a region are connected through low-latency links
o Benefits
▪ Performance
▪ Availability
• Physical Redundancy
• Provides Resilience
• Enable uninterrupted performance
▪ Security
▪ Reliability
▪ Scalable
▪ Low cost
Security and Compliance
Security
Shared responsibility model
- AWS manages security of the cloud
- We are responsible for security in the cloud
o We retain control of the security we choose to implement to protect our own
content, platform, applications, systems, networks
, - AWS provides security-specific tools and features across network security,
configuration management, access control, data encryption
- AWS environments are continuously audited
Benefits of AWS Security
1) Keep data safe
2) Meet Compliance Requirements → Segments of your compliance have already been
completed
3) Save Money → Maintain highest standard of security without having to manage your
own facility
4) Scale Quickly → Security scales with your AWS Cloud usage.
Compliance
Shared Responsibility Model
- AWS operates, manages and controls the components from:
o Host OS
o Virtualization Layer
o Physical Security of the facilities
- Customer assumes responsibility and management of:
o Guest OS [includes updates and security patches]
o Other associated application software
o Configuration of AWS provided security group firewall
- Provides flexibility and customer control that permits the deployment
- Security “of” the cloud → AWS, Security “in” the cloud → Users
Inherited Controls- Controls which a customer fully inherits from AWS
What is Cloud Computing?
On-demand delivery of compute power, database storage, applications, and other IT
resources through a cloud services platform via the Internet with pay-as-you-go-pricing.
- A cloud services platform provides rapid access to flexible and low-cost IT resources
- Pay for what you use model.
Six Advantages of Cloud Computing
• Trade capital expense for variable expense – No need to heavily invest in data
centres or servers
• Benefit from massive economies of scale – Lower variable cost, usage by hundreds of
thousands of customers aggregated in the cloud. Translates into lower pay-as-you-go
prices
• Stop guessing capacity – Can access as much or as little capacity as you need, scale
up and down as required
• Increase speed and agility – Reduce time needed to make those resource available to
your developers. Lowers cost and time to experiment and develop.
• Stop spending money running and maintaining data centres – No need worry about
the infrastructure
• Go global in minutes – Easily deploy application in multiple regions around the world
with just a few clicks. Can provide lower latency and a better experience for
customers at minimal cost.
Types of Cloud Computing
Cloud Computing Models
Infrastructure as a Service (IaaS)
- Contains building blocks for cloud IT
- Typically provide access to networking features, computers (virtual or dedicated
hardware), data storage space
- Provides highest level of flexibility and management control over IT resources
Platform as a Service (PaaS)
- Removes the need for organisation to manage underlying infrastructure (hardware
and OS)
- Allows you to focus on the deployment and management of your applications
- No need to worry about resource procurement, capacity planning, software
maintenance, patching, or any other undifferentiated heavy lifting involved in
running your application
,Software as a Service (SaaS)
- Provides a completed product that is run and managed by the service provider
- Refers to end-user applications
- Do not need to think about how the service is maintained or how the underlying
infrastructure is managed
- Example is web-based email which you can use to send and receive email without
having to manage feature additions to the email product or maintain servers and OS
the email program is running on.
Cloud Deployment Models
Cloud
- Fully deployed in the cloud and all parts of the application run in the cloud.
- Can be build on low-level infrastructure pieces or can use higher level services that
provide abstraction from the management, architecting, scaling requirements of
core infrastructure.
- Benefits of cloud computing
o Agility → easy access to a broad range of technologies
o Elasticity → Scale resource up or down to fit business needs
o Cost Savings → Trade capital expenses for variable expenses. Pay for IT as
you consume. Variable expenses much lower because of economies of scale
o Deploy globally in minutes → AWS has infra all over the world.
Hybrid
- A way to connect infrastructure and applications between cloud-based resources to
existing resources that are not located in the cloud
- Connecting cloud resource to internal system
- Hybrid Cloud with AWS
o VMWare Cloud on AWS
▪ Scalable and secure service that allows organisations to seamlessly
migrate and extend their on-premises VMware vSphere-based
environments to the AWS Cloud, running on Amazon Elastic Compute
Cloud (Amazon EC2) bare metal infrastructure
o AWS Outposts
▪ A hybrid cloud solution that brings the same AWS stuff to virtually any
data centre, co-location space, etc.
▪ Can be used to support workloads that need to remain on-premises
▪ Used to ensure low latency and to support local data processing
needs.
- Uses Cases
o Data centre extension
o VMware cloud migration
, o Cloud services on-premises
o ISV and software compatibility
o Edge computing
On-premises
- Also known as private cloud
- Sought of its ability to provide dedicated resources.
- Use of virtualisation technologies to try and increase resource utilization
Global Infrastructure
- AWS Cloud Infrastructure is built around AWS Regions and Availability Zones
o An AWS Region is a physical location in the world where AWS has multiples
Availability Zones
o Availability Zones consist of one or more discrete data centres, each with
redundant power, networking, and connectivity housed in separate facilities.
o Availability allows you to operate with
▪ High availability
▪ Fault tolerance
▪ Scalability
o AWS Region → Availability Zones → Data Centres (House separately)
▪ AZ in a region are connected through low-latency links
o Benefits
▪ Performance
▪ Availability
• Physical Redundancy
• Provides Resilience
• Enable uninterrupted performance
▪ Security
▪ Reliability
▪ Scalable
▪ Low cost
Security and Compliance
Security
Shared responsibility model
- AWS manages security of the cloud
- We are responsible for security in the cloud
o We retain control of the security we choose to implement to protect our own
content, platform, applications, systems, networks
, - AWS provides security-specific tools and features across network security,
configuration management, access control, data encryption
- AWS environments are continuously audited
Benefits of AWS Security
1) Keep data safe
2) Meet Compliance Requirements → Segments of your compliance have already been
completed
3) Save Money → Maintain highest standard of security without having to manage your
own facility
4) Scale Quickly → Security scales with your AWS Cloud usage.
Compliance
Shared Responsibility Model
- AWS operates, manages and controls the components from:
o Host OS
o Virtualization Layer
o Physical Security of the facilities
- Customer assumes responsibility and management of:
o Guest OS [includes updates and security patches]
o Other associated application software
o Configuration of AWS provided security group firewall
- Provides flexibility and customer control that permits the deployment
- Security “of” the cloud → AWS, Security “in” the cloud → Users
Inherited Controls- Controls which a customer fully inherits from AWS
