Availability Zones Flashcards
Provide a concise and easy-to-understand overview of Azure Availability Zones and their significance in ensuring high availability and reliability of cloud services.
What are Availability Zones in Azure?
Availability Zones are physically separate data centers within an Azure region, each with its own power, cooling, and networking to ensure high availability.
How many Availability Zones are there in a region?
Regions with Availability Zones have a minimum of three individual zones.
Are Availability Zones available in all Azure regions?
No, Availability Zones are not available in all regions. Some regions may lack this feature.
How does Azure ensure low latency between Availability Zones?
Azure ensures a maximum of two milliseconds latency round trip between zones, indicating close physical proximity.
What is the recommendation for Azure users in regions without Availability Zones?
Users should use the next closest region within their country that has Availability Zones or wait for zones to be added if planned.
What is the purpose of Availability Zones?
The main goal is to achieve redundancy within a region for high availability and reliability of cloud services.
How do Availability Zones work with Azure services?
Services can be replicated across multiple zones. For example, Azure storage accounts can use zone-redundant storage to replicate data across zones.
What happens if one Availability Zone becomes unavailable?
If one zone is down, the service remains operational as the data or service is available in the other zones, minimizing downtime.
What are zonal services in Azure?
Zonal services allow manual association of a resource with a specific zone, useful for distributing resources like virtual machines across zones for availability.
What are zone redundant services in Azure?
These services automatically replicate data across zones without manual intervention, enhancing data availability and reliability.
Is there an additional cost associated with using multiple Availability Zones?
Yes, duplicating services or data across multiple zones typically incurs additional costs compared to single-zone services.
