CompTIA Security+ Exam Prep

Answer: B - Layered operating system provides data hiding and separates system functionality into hierarchical layers. This is different from a monolithic architecture, in which the different modules can communicate with any other module. Layered operating systems provide for data hiding, which means that instructions and data are the various layers do not have direct access to the instructions and data at any other layers. Each procedure at each layer has access only to its own data and a set of functions that it requires to carry out its own tasks.