To deploy a highly available e-commerce app that distributes load across multiple VMs, which Azure service manages incoming traffic?

Azure Load Balancer is the correct choice because it distributes incoming network traffic across multiple virtual machines within the same Azure region, ensuring high availability and responsiveness for applications like an e-commerce site. It operates at Layer 4 (transport layer) of the OSI model. Azure DNS provides domain name resolution, not traffic distribution. Azure Traffic Manager distributes traffic globally based on various routing methods, but it doesn't directly manage traffic to VMs within a single region for load balancing. Azure Application Gateway is a Layer 7 (application layer) load balancer that can handle advanced routing and SSL termination, but for basic distribution across VMs, Azure Load Balancer is the more fundamental and often sufficient service.