AZ-900 TERMS AND FUNDAMENTALS
high availability - Answers - Is one of the benefits of the cloud that help maintain
availability due to network outages, app failure, power outages and more
Scalability - Answers - Benefit of the cloud that allows the ability to add or reduce
resources; can be horizontal or vertical
Elasticity - Answers - Benefits of the cloud that allows the ability to scale automatically
based on metrics like CPU and memory
Agility - Answers - Benefit of the cloud that efficiency and speed to be when scaling up
or out
fault tolerance - Answers - Benefit of the cloud that moves you from an unhealthy VM
or resources to a healthy one to maintain availability;
Disaster Recovery - Answers - Benefit of the cloud that helps maintain reliable
backups and maintaining your app resources in an available region
On-premises Model - Answers - In this model you pay for hardware, and physical
servers; CapEx that is not agile
Cloud Model - Answers - In this model, you only pay for what you use and have the
agility of the cloud; OpEx our day to day expenditures
economies of scale - Answers - Reduction in cost that occurs with the purchase of
larger quantities
IaaS - Answers - In this service the cloud provide handles mainly the computing aspect
and the customer maintains the middleware and application; offers the greatest
flexibility
PaaS - Answers - In this service the hardware, OS and other middleware is handled by
the cloud provider; user only handles the application framework; Azure App Service,
SQL Database, IoT Central
SaaS - Answers - In the service the cloud provider provides everything from computing
power all the way to the application; large availability but low customization
Public Cloud - Answers - Is a multi tenant environment that is accessible on a public
network and provides resources that are shared with the public; ex. Microsoft Azure
Private Cloud - Answers - Is a model like the public cloud but for a single company or
tenant; can be hosted on premises or by a third party
, Hybrid Cloud - Answers - Is a combination of both public and private cloud
environments; Azure Stack can be utilized to achieve this type of environment.
Azure Regions - Answers - Data centers that are located within geographies that are
hundreds of miles apart; help maintain disaster recovery and high availability
Availability zones - Answers - Are locations within a region that help maintain fault
tolerance and high availability; there is a maximum of three per region; must be
explicitly deployed for VMs, managed disks and public IP addresses but not for SQL
and zone-redundant storage
ARM Azure Resource Manager - Answers - Is the system in Azure that works behind
the scenes to deploy and organize your resources through templates in JSON
Resources groups - Answers - Containers for your Azure resources that allow you
easily organize, deploy and update your resources; allow the use of tags
Azure Virtual Machines - Answers - Are software based computers that run on a host
computer in a Azure data center; can be several OSs
Availability sets - Answers - Are created to avoid planned maintenance or unplanned
downtime; are made up of physical racks and individual computers; have to be explicitly
created
Scale sets - Answers - Allow you to choose which OS to run in an availability set and
are also scalable; compatible with availability zones
Containers - Answers - Are zipped versions of an application that includes everything
the app needs to run; usually run on Docker; ACI is a PaaS offering
Kubernetes - Answers - Is a container manager that holds several containers within a
pod that run on computers called nodes and are controlled by a master node; AKS
helps configure pods.
Azure Virtual Network - Answers - Allows one resource to connect to another and
communicate internally; can be split into subnets with their own private IP addresses;
can't communicate with internet unless IP addresses is public
Azure Load Balancer - Answers - Is a networking product that sits between the users
and VM and manages the traffic; maintains a public IP addresses that communicates
with the subnets
Azure Application Gateway - Answers - A load balancer that is ideal for HTTP traffic;
can use a cookie and display customized pages
high availability - Answers - Is one of the benefits of the cloud that help maintain
availability due to network outages, app failure, power outages and more
Scalability - Answers - Benefit of the cloud that allows the ability to add or reduce
resources; can be horizontal or vertical
Elasticity - Answers - Benefits of the cloud that allows the ability to scale automatically
based on metrics like CPU and memory
Agility - Answers - Benefit of the cloud that efficiency and speed to be when scaling up
or out
fault tolerance - Answers - Benefit of the cloud that moves you from an unhealthy VM
or resources to a healthy one to maintain availability;
Disaster Recovery - Answers - Benefit of the cloud that helps maintain reliable
backups and maintaining your app resources in an available region
On-premises Model - Answers - In this model you pay for hardware, and physical
servers; CapEx that is not agile
Cloud Model - Answers - In this model, you only pay for what you use and have the
agility of the cloud; OpEx our day to day expenditures
economies of scale - Answers - Reduction in cost that occurs with the purchase of
larger quantities
IaaS - Answers - In this service the cloud provide handles mainly the computing aspect
and the customer maintains the middleware and application; offers the greatest
flexibility
PaaS - Answers - In this service the hardware, OS and other middleware is handled by
the cloud provider; user only handles the application framework; Azure App Service,
SQL Database, IoT Central
SaaS - Answers - In the service the cloud provider provides everything from computing
power all the way to the application; large availability but low customization
Public Cloud - Answers - Is a multi tenant environment that is accessible on a public
network and provides resources that are shared with the public; ex. Microsoft Azure
Private Cloud - Answers - Is a model like the public cloud but for a single company or
tenant; can be hosted on premises or by a third party
, Hybrid Cloud - Answers - Is a combination of both public and private cloud
environments; Azure Stack can be utilized to achieve this type of environment.
Azure Regions - Answers - Data centers that are located within geographies that are
hundreds of miles apart; help maintain disaster recovery and high availability
Availability zones - Answers - Are locations within a region that help maintain fault
tolerance and high availability; there is a maximum of three per region; must be
explicitly deployed for VMs, managed disks and public IP addresses but not for SQL
and zone-redundant storage
ARM Azure Resource Manager - Answers - Is the system in Azure that works behind
the scenes to deploy and organize your resources through templates in JSON
Resources groups - Answers - Containers for your Azure resources that allow you
easily organize, deploy and update your resources; allow the use of tags
Azure Virtual Machines - Answers - Are software based computers that run on a host
computer in a Azure data center; can be several OSs
Availability sets - Answers - Are created to avoid planned maintenance or unplanned
downtime; are made up of physical racks and individual computers; have to be explicitly
created
Scale sets - Answers - Allow you to choose which OS to run in an availability set and
are also scalable; compatible with availability zones
Containers - Answers - Are zipped versions of an application that includes everything
the app needs to run; usually run on Docker; ACI is a PaaS offering
Kubernetes - Answers - Is a container manager that holds several containers within a
pod that run on computers called nodes and are controlled by a master node; AKS
helps configure pods.
Azure Virtual Network - Answers - Allows one resource to connect to another and
communicate internally; can be split into subnets with their own private IP addresses;
can't communicate with internet unless IP addresses is public
Azure Load Balancer - Answers - Is a networking product that sits between the users
and VM and manages the traffic; maintains a public IP addresses that communicates
with the subnets
Azure Application Gateway - Answers - A load balancer that is ideal for HTTP traffic;
can use a cookie and display customized pages
