Azure architecture Flashcards
What is a Region in cloud architecture?
An area that consists of one or multiple data centres within a specific radius connected via a high-performance / low-latency network.
What are Availability zones?
Physically separate zones within a region that are designed to achieve redundancy and fault tolerance. They have independent power, cooling and infrastructure.
They are not in all regions but if they are, there are at least 3 of them per region.
What is Geo-replication?
Protection against risks towards entire regions via region pairing in case when really high availability and reliability is needed.
What are the factors playing role in deciding which regions to pair?
Data residency
Compliance
Geo-political
Internet latency
What are Region pairs?
Regions far enough to be isolated (usually over 300 miles) placed in the same geography, meaning discrete market and
What are Sovereign regions? Examples?
Regions completely separated from the public cloud and isolated from the main instance of Azure because they fall under very strict compliance or legal requirements.
Examples: US Government, US Dpt. of Defense Central, China
What is Resource and what are Resource groups?
Resource is an instance of a service like VM or SQL db deployed to a certain region, usually close to where users are in order to achieve low latency.
Every Resource has to be part of (only) one Resource group, which is basically a container of resources used as a management layer to facilitate configuration, deleting resources or permissions. Permissions are inherited, tags are not.
Can a Resource be deployed to a different region than its Resource group?
Yes, Resource group only contains metadata, no actual resource data.
Can Resource groups be nested?
No.
What is the hierarchy with subscriptions, accounts, management groups, resources and resource groups?
The MS Azure account is always at the top, there can be multiple subscriptions under this account and every subscription can contain multiple resource groups with their resources.
In case of need management groups (for example IT, HR, Finance) can be set under the account and there can be multiple subscriptions within a management group.
Can subscriptions be merged into one?
No.
Can resources be migrated between subscriptions?
Yes.
Can management groups be nested?
Yes. For example IT dpt MG can be divided into Data Science and BI units.
When do we use management groups?
They are usually used to apply specific policies (department policies or country policies), security measures or cost analysis.
How can the portal of Azure China be accessed?
portal.azure.cn
