CISSP® Certification Domain 3: Security Architecture and Engineering Video Boot Camp for 2022 - Secure system design con

The video tutorial covers the concept of layering in hardware and software, emphasizing the separation of functionalities into layers that interact only with adjacent layers. It explains kernel and user modes, highlighting their roles in system access and recovery. The tutorial compares open and closed systems, discussing their security implications. Finally, it introduces the ring model, a theoretical framework for separating trusted and untrusted components in a system.

What is the primary purpose of layering in computer systems?

• To make the system more complex for security reasons

• To ensure hardware and software are tightly coupled

• To separate hardware functionality into layers that only interact with adjacent layers

• To allow layers to interact with any other layer

Which mode allows low-level unrestricted access to memory, CPU, and disk?

• Application mode

• Kernel mode

• User mode

• Problem mode

What is a key characteristic of open systems?

• They use proprietary hardware and software

• They are built to open standards and allow components from multiple vendors

• They are not tested or audited for flaws

• They are more secure due to obscurity

In the ring model, which ring is typically used for the kernel in real-world systems?

• Ring 3

• Ring 0

• Ring 2

• Ring 1

What is the purpose of hypervisor mode, also known as ring -1?

• To enhance the speed of the operating system

• To replace the kernel in ring 0

• To provide a user interface for applications

• To manage virtual machine hosts