How it works
A common scenario for Batch involves scaling out intrinsically parallel work, such as the rendering of images for 3D scenes, on a pool of compute nodes. This pool can be your "render farm" that provides tens, hundreds, or even thousands of cores to your rendering job.
https://learn.microsoft.com/en-us/azure/batch/batch-technical-overview
You configure compute nodes for parallel task execution at the pool level.
https://learn.microsoft.com/en-us/azure/batch/batch-parallel-node-tasks

Azure Front Door meets the requirements. The Azure Web Application Firewall (WAF) rate limit rule for Azure Front Door controls the number of requests allowed from clients during a one- minute duration.
Reference:
https://www.nginx.com/blog/nginx-plus-and-azure-load-balancers-on-microsoft-azure/
https://docs.microsoft.com/en-us/azure/web-application-firewall/afds/waf-front-door-rate-limit-powershell

Explanation:
Box 1: Azure Resource Mover
To move Azure VMs to another region, Microsoft now recommends using Azure Resource Mover.
Box 2: Azure Migrate
Azure Migrate provides a centralized hub to assess and migrate on-premises servers, infrastructure, applications, and data to Azure.
Azure migrate includes Azure Migrate Server Migration: Migrate VMware VMs, Hyper-V VMs, physical servers, other virtualized servers, and public cloud VMs to Azure.
Reference:
https://docs.microsoft.com/en-us/azure/resource-mover/overview
https://docs.microsoft.com/en-us/azure/migrate/migrate-services-overview
https://docs.microsoft.com/en-us/azure/site-recovery/azure-to-azure-tutorial-migrate

Explanation:
Box 1: Workspace replication
Enhance resilience by replicating your Log Analytics workspace across regions Replicating your Log Analytics workspace across regions enhances resilience by letting you switch over to the replicated workspace and continue operations if there's a regional failure Box 2: Availability zones Availability zones are physically separate groups of datacenters within each Azure region. When one zone fails, services can fail over to one of the remaining zones.
Availability zones works within a single region.
Azure App Service can be configured as zone redundant, which means that your resources are spread across multiple availability zones. Spreading across multiple zones helps your production workloads achieve resiliency and reliability. When you configure zone redundancy on App Service plans, all apps that use the plan are made zone redundant.
Reference:
https://learn.microsoft.com/en-us/azure/azure-monitor/logs/workspace-replication
https://learn.microsoft.com/en-us/azure/architecture/web-apps/guides/enterprise-app-patterns/reliable-web-app/dotnet/guidance
https://learn.microsoft.com/en-us/azure/reliability/reliability-app-service?pivots=free-shared-basic

Explanation:
Box 1: A Traffic Manager profile
To support load balancing across the regions we need a Traffic Manager.
Box 2: Priority traffic routing
Priority traffic-routing method.
Often an organization wants to provide reliability for their services. To do so, they deploy one or more backup services in case their primary goes down. The 'Priority' traffic-routing method allows Azure customers to easily implement this failover pattern.
Reference:
https://docs.microsoft.com/en-us/azure/architecture/reference-architectures/app-service-web-app/multi-region
https://docs.microsoft.com/en-us/azure/traffic-manager/traffic-manager-routing-methods