AWS Networking a Three Tiered Network Architecture Diagram With High Availability Across Two Availability Zones / One Region

The Following Diagram Shows AWS Networking a Three Tiered Network Architecture Diagram With High Availability Across Two Availability Zones / One Region


 
To further increase HA, you can setup Multi-Region High Availability.
More specifically, In addition to building a highly available application that runs in a single region, if your application requires fault tolerance over and above multi-AZ the:
Multi-Region HA can be delivered by provisioning and running infrastructure in another region and sing Amazon Route 53 to load balance the traffic between the regions (beyond the scope of this post but something to be aware of if you really need it – your costs will increase with multi-region HA).
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