You have an application (App1) that accepts traffic on a fixed set of 50 TCP ports and 50 UDP ports. App1 runs on 10 Azure VMs. You need to load-balance App1 across the VMs while minimizing the number of load-balancing rules you must create. Which of the following should you use?

The correct answer is Azure Standard Load Balancer with HA ports enabled. HA ports allow a single load balancing rule to cover all TCP and UDP ports, simplifying configuration significantly when dealing with a large and fixed set of ports like 50 TCP and 50 UDP. This minimizes the number of rules needed. Azure Application Gateway V2 with multiple listeners is designed for HTTP/HTTPS traffic and layer 7 load balancing, not the broad range of TCP/UDP ports specified. Multiple site hosting is also a layer 7 feature. Azure Standard Load Balancer with Floating IP (Direct Server Return) is used for specific scenarios where the backend server needs to respond directly to the client, but it doesn't reduce the number of rules required for multiple ports.