ISC2 Certified Cloud Security Professional (CCSP) Practice Question
During a security assessment of an IaaS environment, you are asked to recommend a way to perform malware scanning on several hundred tenant VMs without installing an antivirus agent inside every guest. The method should leverage functionality already built into most enterprise hypervisors and keep the scanning engine isolated from the workloads. Which approach best satisfies these requirements?
Apply paravirtualized device drivers so malware scanning tasks are off-loaded to the guest kernel space.
Use virtual machine introspection to run an agentless antivirus appliance that inspects guests from the hypervisor layer.
Enable nested virtualization in each VM and deploy a lightweight scanning VM inside the guest.
Leverage cloud-init to automatically install and update an antivirus agent within every guest at boot time.
Virtual machine introspection (VMI) exposes a hypervisor API that allows a dedicated security appliance to examine guest memory, disk, and network activity from outside the VM. Because the scanner runs on a separate, privileged VM and relies on the hypervisor to provide raw guest data, no in-guest agents are required and the performance impact on tenants is minimal.
Nested virtualization still requires an additional guest and offers no direct inspection capability.
Cloud-init merely automates installation of traditional in-guest agents, so each VM would still carry the overhead.
Paravirtualized device drivers improve I/O efficiency but do not provide agentless security scanning.
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ISC2 Certified Cloud Security Professional (CCSP)
Cloud Platform & Infrastructure Security
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