A technician is tasked with running three Windows 10 virtual machines simultaneously on a developer's workstation for application testing. The host computer currently has a quad-core CPU, 8 GB of DDR4 RAM, a 256-GB SATA SSD with 100 GB free, and a single Gigabit NIC. After building the first VM, both the host and guest OSs become noticeably sluggish. To meet virtualization requirements and support two additional VMs, which host resource should be upgraded first?
Each running virtual machine needs its own dedicated portion of physical memory in addition to what the host OS consumes. With only 8 GB installed, the host has little RAM left after allocating memory to the first VM, causing heavy paging that slows both systems. CPU cores, disk capacity, and network bandwidth remain adequate for two more light-duty test VMs, but insufficient RAM will continue to be a bottleneck until it is increased.
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Why is RAM more important than CPU cores in this virtualization scenario?
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What happens when there is not enough RAM for multiple VMs?
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Why are SSD storage and network speed less critical in this scenario?