CompTIA Cloud+ Practice Test

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What is the most likely cause of a virtual machine having a different time setting than the host after logging on?

The virtual machine cannot communicate with the network.
The guest tools are not installed.
The vNIC is not configured correctly.
The VLAN tag is incorrect.

The correct answer is: The guest tools are not installed.

The most likely cause of a virtual machine displaying a different time setting than the host after logging on is that the guest tools are not installed. Guest tools, such as VMware Tools or Hyper-V Integration Services, are essential for optimizing the performance of virtual machines. They provide a set of drivers and utilities that allow the virtual machine to communicate more effectively with the hypervisor. One key functionality these tools provide is synchronization of the system clock between the virtual machine and the host. When the guest tools are not installed, the VM might operate on its own internal clock without synchronization, leading to time discrepancies. In contrast, while issues like network communication, vNIC configuration, and VLAN tagging are critical for connectivity and data traffic management, they do not directly relate to clock synchronization between the guest and host systems. Thus, these factors are less likely to cause the observed time difference.