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Difficulty: HardAzure Virtual Networks, ExpressRoute, and VPN Gateway

An organization is designing a hybrid cloud network to connect its on-premises database to resources in Azure. The network connection must support database replication with predictable, low-latency performance and must ensure that data is never routed over the public internet. Which Azure service should the organization deploy to meet these requirements?

  1. Azure ExpressRouteAnswer
  2. B
    Azure VPN Gateway (Site-to-Site)
  3. C
    Azure Virtual Network peering
  4. D
    Azure Bastion

Answer

Azure ExpressRoute
The correct service is Azure ExpressRoute because it establishes a private, dedicated physical connection between the on-premises datacenter and Azure through a connectivity partner. Since this connection does not use the public internet, it meets the requirements of predictable latency and complete isolation from public internet routing.

Step-by-Step Solution

1
Analyze the requirements for hybrid connectivity: the connection must bypass the public internet and require predictable, low-latency performance.
Connections that rely on the public internet (such as VPNs) are eliminated from the correct solution path.
Public internet routing introduces unpredictable latency and does not satisfy the requirement to completely bypass the public internet.
2
Evaluate the remaining options to identify which service establishes a private, dedicated connection from on-premises to Azure.
Azure ExpressRoute matches the requirements because it uses a private fiber connection established through a connectivity provider.
ExpressRoute ensures that traffic travels directly to Microsoft's edge environment without traversing the public internet, meeting both the performance and security constraints.

Key Concept

Azure ExpressRoute provides a dedicated, private connection to Microsoft cloud services that bypasses the public internet, offering higher reliability, faster speeds, and lower latencies than typical VPN connections.
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Topics

Azure Virtual Networks, ExpressRoute, and VPN Gateway

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