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Answer: one Azure Firewall
The correct answer is D (one Azure Firewall). Azure Firewall is a managed, cloud-based network security service that protects your Azure Virtual Network resources. It is a stateful firewall solution, meaning it can track the state of active connections and make more intelligent decisions to block or allow traffic. Azure Firewall can be deployed centrally and used to enforce security policies across multiple virtual networks, which makes it the appropriate choice for this scenario where 10 virtual networks need to be protected. Other options like an application security group (ASG) or network security groups (NSGs) are designed for different granularities and use cases. Considering scale and centralized control, Azure Firewall is the best choice.
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In an Azure environment consisting of 10 virtual networks and 100 virtual machines, which Azure service should be implemented to effectively limit the amount of inbound traffic across all virtual networks?
A
one application security group (ASG)
B
10 virtual network gateways
C
10 Azure ExpressRoute circuits
D
one Azure Firewall