LLMResponse AC.L2-3.1.1.c

Evidence Types and Assessment Approaches for AC.L2-3.1.1 Assessment Objective [c]

Ranking of Evidence Types for Assessment Objective [c]

For the assessment objective "[c] devices (and other systems) authorized to connect to the system are identified," I recommend prioritizing evidence types in this order:

1. **Artifacts**: These provide the strongest evidence for this objective, including:

  - Network device inventories and asset management databases
  - Network access control (NAC) system records
  - DHCP server leases and reservations
  - Network diagrams showing authorized connections
  - MAC address whitelists and device registration records

2. **Documents**: Supporting formal documentation including:

  - Device authorization policies and procedures
  - Network connection approval forms
  - System security plans describing device connection requirements
  - Network architecture documentation
  - Authorized device lists with ownership information

3. **Screen Share**: Observing real-time demonstrations of:

  - Network management systems showing connected devices
  - Device registration processes
  - Network monitoring dashboards
  - Configuration of device authentication mechanisms

4. **Physical Review**: On-site examination to verify:

  - Physical network infrastructure
  - Device identification labels
  - Physical access to network connection points
  - Network equipment configurations

Prioritizing Assessment Approaches

For assessment objective [c], I recommend prioritizing the three assessment approaches as follows:

1. **Examine**: This should be your primary approach for this device-focused objective:

  - Review lists of devices and systems authorized to connect to organizational systems
  - Examine network device inventories and registration records
  - Review network diagrams showing permitted connections
  - Check device authentication and authorization procedures
  - Examine network access control configurations

2. **Test**: Perform technical validation:

  - Test network access control mechanisms to verify unauthorized devices cannot connect
  - Observe device registration and authorization processes
  - Verify that network monitoring systems accurately identify connected devices
  - Confirm that device authentication methods work as documented

3. **Interview**: Complete your assessment with supporting interviews:

  - Speak with network administrators about device authorization procedures
  - Interview IT staff responsible for network access management
  - Discuss device connection policies with security personnel
  - Query system administrators about how they identify and track authorized devices

This prioritization recognizes that device authorization is fundamentally a documented and technically-enforced control, where examination of records and technical testing provide the most direct evidence that devices authorized to connect to the system are properly identified and tracked.