AZ-104 · Question #117
AZ-104 Question #117: Real Exam Question with Answer & Explanation
This question tests understanding of Azure Virtual Network Peering, specifically how peering relationships work (non-transitive nature), and whether VMs in different VNets can communicate based on the peering configurations provided.
Question
Hotspot Question You have an Azure subscription named Subscription1. Subscription1 contains the virtual networks in the following table. Subscription1 contains the virtual machines in the following table: The firewalls on all the virtual machines are configured to allow all ICMP traffic. You add the peerings in the following table. For each of the following statements, select Yes if the statement is true. Otherwise, select No. NOTE: Each correct selection is worth one point. Answer:
Options
- __typehotspot
- variantyes_no
Explanation
This question tests understanding of Azure Virtual Network Peering, specifically how peering relationships work (non-transitive nature), and whether VMs in different VNets can communicate based on the peering configurations provided.
Approach. Azure VNet peering is non-transitive by default, meaning if VNet A is peered with VNet B, and VNet B is peered with VNet C, VMs in VNet A cannot communicate with VMs in VNet C unless a direct peering exists between A and C. To determine connectivity, you must trace the explicit peering links: only VMs whose VNets have a direct peering relationship (with both 'Allow Virtual Network Access' enabled on both sides) can communicate via ICMP. Also, VMs within the same VNet can always communicate. When analyzing each statement, check whether a direct peering path exists between the VNets of the two VMs in question - if yes, communication is possible (Yes); if connectivity relies on transitive routing through an intermediate VNet without User Defined Routes or a hub/spoke gateway configuration, the answer is No.
Concept tested. Azure Virtual Network Peering - non-transitive peering behavior, direct vs. indirect connectivity between VMs across peered VNets, and the requirement for explicit bi-directional peering links for network communication.
Reference. https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-peering-overview
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