A company wants to consolidate five physical servers into one host to reduce power and cooling costs. Each server runs a different operating system. Which virtualization technology should be used to achieve this?

Install a Type 2 hypervisor on each physical server

Migrate all applications to a single OS using compatibility layers

Use containerization instead of virtualization

Consolidate five physical servers into one host…

Correct answer & explanation

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Use a Type 1 hypervisor like VMware ESXi on a single host

Server consolidation uses a Type 1 hypervisor (bare-metal) to run multiple VMs directly on hardware, maximizing resource utilization. This is the standard approach for data center virtualization.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

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Install a Type 2 hypervisor on each physical server
Why it's wrong here
Installing a Type 2 hypervisor, such as Oracle VirtualBox or VMware Workstation, on each physical server would not achieve consolidation. These hypervisors run as an application within a host operating system, introducing significant overhead due to the additional OS layer. This architecture consumes more resources and offers reduced performance compared to bare-metal solutions, making it inefficient for consolidating multiple production servers onto fewer physical machines. Furthermore, it would still require five physical servers, defeating the purpose of consolidation.
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Use a Type 1 hypervisor like VMware ESXi on a single host
Why this is correct
A Type 1 hypervisor, also known as a bare-metal hypervisor like VMware ESXi, Microsoft Hyper-V, or Citrix XenServer, installs directly onto the physical server hardware. This direct access to hardware resources allows it to efficiently manage and allocate CPU, memory, and storage to multiple virtual machines (VMs) running different operating systems simultaneously. By consolidating five physical servers into virtual machines on a single, powerful physical host, this approach significantly reduces hardware footprint, power consumption, and cooling costs while maintaining high performance and isolation for each virtualized server.
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Migrate all applications to a single OS using compatibility layers
Why it's wrong here
Migrating all applications to a single operating system using compatibility layers, such as Wine for Linux or Windows' built-in compatibility modes, is not a viable solution for consolidating five physical servers that likely run diverse operating systems. Compatibility layers allow applications designed for one OS to *attempt* to run on another, but they do not provide the isolation or the ability to run distinct operating systems concurrently. This method would require extensive re-engineering, might introduce instability, and fails to address the fundamental need to host multiple, potentially different, server environments.
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Use containerization instead of virtualization
Why it's wrong here
While containerization, using technologies like Docker or Kubernetes, offers excellent application isolation and portability, it is fundamentally different from virtualization in this context. Containers share the host operating system's kernel, meaning all containers on a single host must run on the same underlying OS (e.g., Linux containers on a Linux host). This approach cannot consolidate five physical servers that are likely running different operating systems (e.g., Windows Server, various Linux distributions) into distinct, isolated environments, as each would require its own kernel, which containers do not provide.

220-1201 Practice Question: Consolidate five physical servers into one host…

Why each option matters

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