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CompTIA Security+ · CompTIA
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Virtualization allows multiple virtual machines (VMs) to run on fewer physical servers. By consolidating workloads onto a smaller number of host systems, organizations can significantly reduce the number of physical servers and the operating systems that must be managed. Why not B: While this can reduce the number of OS instances, the question focuses on replacing physical servers with an architecture, which is more directly associated with virtualization as the server consolidation strategy.
B. "Containers provide application-level virtualization. Instead of creating complex virtual machines that require their own operating systems, containers package applications and allow them to be treated as units of virtualization that become portable across operating systems and hardware platforms" per Security Plus Study guide by Sybex
Containers package applications and their dependencies, allowing multiple applications to share the same OS kernel. This reduces the need for multiple full OS instances, but containers still run on a host OS. ✅ (possible, but let’s check others)