You deployed VMs to three regions with virtual networks peered in a full mesh. Each subnet has an NSG with rules. A user cannot connect on port 33000 from a VM in one region to a VM in another region. Which two options can you use to diagnose this issue?

IP flow verify checks if a packet is allowed or denied to/from a VM, identifying the specific NSG rule causing the block. This directly addresses the user's inability to connect. Connection troubleshoot tests connectivity between a source and destination VM, providing a detailed path analysis and identifying any blocking components like NSGs, firewalls, or routing issues. Azure Virtual Network Manager is for managing network configurations across multiple VNETs, not for real-time diagnostics of connectivity issues. Azure Monitor Network Insights provides aggregated network health and performance metrics, but not granular packet flow analysis for a specific connection problem. Effective security rules show the combined NSG rules applied to an interface, but don't actively diagnose a connection failure like IP flow verify or connection troubleshoot.