200-201 Question 15
Single answerA cybersecurity analyst is tasked with deploying an application in a secure environment. The application must run in isolation to prevent unauthorized access to the host operating system. The analyst is considering using either containerization or virtualization for this purpose. Which of the following statements correctly describes a key difference between containers and virtual machines in terms of security and resource isolation?
- A
Containers share the host operating system kernel, while virtual machines use a hypervisor to emulate hardware for full isolation.
- B
Containers provide stronger security isolation than virtual machines by default due to their lightweight design.
- C
Virtual machines require significantly less overhead than containers, making them more efficient for resource management.
- D
Containers use a hypervisor to create isolated environments, while virtual machines share the host operating system kernel.
Show answer and explanation
Correct answer: A
Explanation
The key difference between containers and virtual machines lies in their approach to resource isolation. Containers share the host OS kernel, making them lightweight but less isolated by default, while virtual machines use a hypervisor to emulate hardware, providing stronger isolation. This understanding is essential for making informed decisions about secure application deployment.
- A. Correct.
Correct. Containers share the host operating system kernel, which makes them lightweight but less isolated compared to virtual machines. Virtual machines use a hypervisor to emulate hardware and achieve full isolation from the host OS.
- B. Incorrect.
Incorrect. Containers generally provide less security isolation than virtual machines by default because they share the host OS kernel. Additional measures, such as namespaces and control groups, are needed to enhance container security.
- C. Incorrect.
Incorrect. Virtual machines typically require more overhead than containers because they emulate hardware, including the operating system, which consumes more resources.
- D. Incorrect.
Incorrect. Containers do not use a hypervisor; they rely on the host OS kernel to create isolated environments. Virtual machines, on the other hand, use a hypervisor for isolation.