An IT technician is configuring a local virtualization host featuring a single 8-core CPU … — CompTIA A+ (Core 1 & Core 2)

An IT technician is configuring a local virtualization host featuring a single 8-core CPU with Hyper-Threading (providing 16 logical processors) and $32\text{ GB}$ of physical RAM. The hypervisor host requires a baseline reservation of $4\text{ GB}$ of physical RAM and 2 logical processors to ensure host management stability. The plan requires deploying 5 identical application virtual machines (VMs), where each guest VM is allocated $6\text{ GB}$ of RAM and 2 vCPUs. Which of the following best describes the primary hardware resource limitation preventing all 5 VMs from running concurrently at their baseline specifications?

Physical RAM capacity is insufficient because the combined guest and host requirement of $34\text{ GB}$ exceeds the system's $32\text{ GB}$ of installed RAM.Cevap
B
Logical CPU capacity is exceeded because provisioning 5 VMs with 2 vCPUs each requires more threads than the 16 logical processors available.
C
Hyper-Threading must be disabled in the system BIOS/UEFI because guest VMs cannot execute across hyper-threaded logical cores.
D
Host memory reservation is optional because modern hypervisors automatically borrow RAM from inactive guest VMs for host OS tasks.

Cevap

Physical RAM capacity is insufficient because the combined guest and host requirement of

34\text{ GB}

exceeds the system's

32\text{ GB}

of installed RAM.

The total system memory required is calculated by adding the total guest VM memory requirements (

5 \times 6\text{ GB} = 30\text{ GB}

) to the host management overhead reservation (

4\text{ GB}

), yielding

34\text{ GB}

. Since the host system only has

32\text{ GB}

of physical RAM installed, the memory capacity is exceeded by

2\text{ GB}

Adım Adım Çözüm

Calculate total memory required for all guest virtual machines.

5\text{ VMs} \times 6\text{ GB} = 30\text{ GB} of guest RAM required.

Each guest VM needs its full allocated baseline memory to run without performance degradation.

Add the physical RAM overhead required by the host operating system/hypervisor.

30\text{ GB (guests)} + 4\text{ GB (host overhead)} = 34\text{ GB} total physical RAM required.

Host memory must be reserved to maintain hypervisor functionality and prevent system failure.

Compare total required physical RAM against the host hardware configuration.

Required physical RAM (

34\text{ GB}

) > Installed physical RAM (

32\text{ GB}

The system lacks

2\text{ GB}

of physical memory, creating a hard memory bottleneck unless memory overcommitment features (like ballooning) are configured.

Anahtar Kavram

Virtual Machine Memory Sizing and Host Overhead Allocation

Soru

Cevap

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