Final answer:
The recommended access method for preestablished access techniques that cannot be changed by users is MAC (Mandatory Access Control).
Step-by-step explanation:
If the technique to be used is primarily based on preestablished access and cannot be changed by users, the recommended access method would be MAC (Mandatory Access Control).
MAC is a security model where access controls are predetermined by administrators or the system itself. Users do not have the ability to change these access controls, ensuring a high level of security and preventing unauthorized access.
For example, in a military organization, where different levels of classified information exist, MAC can be used to restrict access to certain information based on security clearances.