What does virtualization security focus on?

Virtualization security specifically focuses on the practices designed to protect virtual machines from various threats. This encompasses ensuring that the virtual machines (VMs) are safeguarded against vulnerabilities that can arise due to the shared nature of the underlying physical hardware. Virtualization environments can present unique risks, as multiple VMs often run on the same host, making it crucial to implement security measures that account for the specific architectures and potential attack vectors tied to virtualization technologies.

For instance, protecting a virtual machine may involve using hypervisor security measures, which prevent unauthorized access to the VM host and minimize the risks of VM escape attacks. Additionally, it may involve isolating VMs from each other to prevent one compromised VM from affecting others on the same host.

The other options provided do touch on aspects of security, but they do not specifically encapsulate the essence of virtualization security. While protecting cloud storage systems, limiting virtual network access, and managing user permissions are indeed important elements of a robust security strategy, they do not specifically address the unique challenges posed by virtual machines and their operating contexts. Therefore, the focus on protecting virtual machines captures the core of virtualization security.