Final answer:
The Azure Firewall is designed to filter network traffic across multiple Azure subscriptions and virtual networks, offering granular control over network security within the Azure ecosystem.
Step-by-step explanation:
The service that provides network traffic filtering across multiple Azure subscriptions and virtual networks is the Azure Firewall. Azure Firewall is a managed, cloud-based network security service that offers stateful native firewall capabilities for virtual networks. This includes features like application rule collections, network filtering rules and threat intelligence-based filtering for outbound traffic.
Unlike Azure Traffic Manager, which is a DNS-based traffic load balancer and Azure VPN Gateway, which is used for cross-premises and hybrid configurations Azure Firewall is specifically designed to filter and analyze internet traffic at a very granular level across different subscriptions and virtual networks within the Azure ecosystem.