LLMResponse MA.L2-3.7.5.a

I'll analyze the best approach for assessing objective [a] of CMMC practice MA.L2-3.7.5, which requires multifactor authentication for establishing nonlocal maintenance sessions via external network connections.

Ranking of Evidence Types

For this specific assessment objective, here's how I would rank the evidence types:

1. **Screen Share (I4)** - This provides the strongest real-time evidence as you can directly observe the multifactor authentication process in action during nonlocal maintenance sessions.

2. **Artifacts (I1)** - These would include logs showing multifactor authentication challenges and successful responses during nonlocal maintenance sessions.

3. **Physical Review (I3)** - On-premise observation of the multifactor authentication setup and configuration.

4. **Documents (I2)** - Written policies, procedures, and configurations for nonlocal maintenance sessions.

Prioritization of Assessment Approaches

For obtaining the evidence for assessment objective [a], I recommend prioritizing the approaches as follows:

1. **Test (C3)** - This should be your primary approach as it provides direct evidence of the functionality. You can observe and test the multifactor authentication process in real-time by:

  - Initiating a nonlocal maintenance session
  - Verifying both authentication factors are required
  - Confirming access is only granted after both factors are validated

2. **Examine (C1)** - This supports the test evidence by reviewing:

  - System configuration settings showing MFA requirements for nonlocal maintenance
  - Logs of past nonlocal maintenance sessions showing MFA challenges and responses
  - Documentation of MFA implementation specific to maintenance activities

3. **Interview (C2)** - This provides supporting context by:

  - Discussing with system administrators how MFA is implemented for nonlocal maintenance
  - Confirming the processes with security personnel
  - Validating the knowledge of procedures among maintenance staff

Key Assessment Objects

For the prioritized approaches, focus on these specific assessment objects:

• • Test:**

- Mechanisms for strong authentication of nonlocal maintenance diagnostic sessions - Actual implementation of MFA during connection attempts

• • Examine:**

- System configuration settings showing MFA requirements - Maintenance logs showing MFA challenges - System security plan sections detailing nonlocal maintenance authentication requirements

• • Interview:**

- Personnel with system maintenance responsibilities - Network administrators who configure the authentication systems

This comprehensive approach will provide robust evidence of compliance with the multifactor authentication requirement for nonlocal maintenance sessions.