Difference of resoure assign, advance resource group and AD resource group

Hi DC Experts,

 

May I know the difference of these three. I am having difficulties which I will use.

 

Here is the scenario.

 

I have a user that is member of multiple groups user1 member of GroupA GroupB and GroupC.

 

Each Group have different resources

 

GA = R1 and R2 GB = R3 and R4 GC = R5 and R6

 

My problem is that what resource type I will use if I need to add just an access portal that the user1 will see all resources and the newly added portal access.

 

Thank you.

 

-Nat