Upstream group policies can override downstream group policies?

Question

Active Directory

Thank you in advance, if possible, please describe in detail in simple words

Answer 1

There are only three options that can interfere with the order in which policies are applied by default - No override, Block Inheritance, and Enforce Policy.
In this case, the No override option is suitable, which allows you to apply policies regardless of other policies that override it.

Answer 2

Like as lower politicians redefine higher. That is, if you have one policy in the OU, and you put a competing policy in the OU nested in it, then it will overwrite the top one. Otherwise nested OUs lose their meaning.

Answer 3

Read about disabling inheritance.