O4.1: Improve and implement network health monitoring and scanning.

• 4.1.1: Make, streamline, and monitor network and Exit node reachability scanners.

• 4.1.2: Implement developer-facing tools to monitor relay health.

• 4.1.3: Implement reports for relay operators to understand the health of their relay.

• 4.1.4: Implement relay descriptor changes for relays to self-report overload, problems and diagnostic information.

• Specify overload relay descriptors for load balancing and network health

• Implement relay overload monitoring

• Create an exitmap module for DNS exit checks