Microsoft Certified: Azure Solutions Architect ExpertDesign infrastructure solutionsHard
An energy company is migrating a legacy SCADA (Supervisory Control and Data Acquisition) system to Azure. The SCADA system relies heavily on UDP multicast for real-time communication between control components and field devices. The company needs to ensure that this multicast traffic functions correctly within the Azure Virtual Network. Which Azure networking feature is required to support this communication model?
- AAzure Route Server
- BAzure Virtual Network Gateway
- CAzure Firewall
- DAzure Load Balancer (Standard SKU)
Show answer & explanationAnswer & explanation
Correct answer: A. Azure Route Server
Azure Route Server enables dynamic routing between a Virtual Network Gateway (VPN or ExpressRoute) and network virtual appliances (NVAs) or other routing solutions in the VNet. Crucially, it supports multicast routing within the Azure Virtual Network, which is essential for legacy applications like SCADA systems that rely on UDP multicast.
Why the other options are wrong
- B. Azure Virtual Network Gateway connects Azure VNets to on-premises networks or other VNets but does not inherently provide multicast routing within the VNet.
- C. Azure Firewall provides network security and filtering but does not enable multicast routing within the VNet.
- D. Azure Load Balancer (Standard SKU) supports UDP traffic and can be used for internal load balancing but does not provide multicast routing capabilities.
Azure Route Server Multicast
Azure Route Server facilitates dynamic routing with network virtual appliances and supports multicast routing within an Azure Virtual Network, enabling communication for legacy applications that rely on UDP multicast.
- Enables dynamic routing (BGP) in Azure VNets
- Integrates with NVAs and VPN/ExpressRoute gateways
- Supports multicast routing within the VNet
- Crucial for legacy applications requiring multicast
Memory trick: For multicast, the 'Route Server' directs the 'multi-traffic'.