You need to validate the security design of the Power Platform solution. 
Please select the four layers of the Power Platform security.

Answer options:

A.Licensing
B.PCF
C.Azure AD
D.DLP Policies
E.Teams
F.Security roles

Correct Answers: A, C, D and F 
Solution Architect needs to know the security foundation for the Power Platform solutions. The Power Platform provides the six levels of environment security: Azure AD — manages user identities. All users accessing Dataverse data are authenticated by Azure AD. You can use Azure AD features, like Azure AD groups, conditional access, two-factor authentication, single sign-on, etc.
Licensing — controls user’s access to the Power Platform. All users need to have a license to use the Power Platform products and services.
Environments — containers for the solutions that Azure AD groups control access to.
Data Loss Prevention (DLP) policies — prevents unintentional exposure of the organization’s data. For multi-tenant environments, you can create cross-tenant policies to restrict inbound and outbound connections.
Security roles — controls access to the Dataverse data.
Encryption — controls data security. All environment data is encrypted by SQL Server Transparent Data Encryption (TDE) at rest and SSL in transit.
All other options are incorrect. 
For more information about Power Platform security layers, please visit the below URL: 

https://docs.microsoft.com/en-us/learn/modules/power-platform-architecture/2-environments