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Broadcom-VMware

2V0-21.23 · Question #56

An administrator has been notified that a number of hosts are not compliant with the company policy for time synchronization. The relevant portion of the policy states: All physical servers must…

The correct answer is B. Ensure that each ESXi host is configured to use a Precision Time Protocol (PTP) source. To comply with a policy requiring microsecond-accurate time synchronization for physical servers, the administrator must configure the ESXi hosts to use Precision Time Protocol (PTP). PTP provides the necessary high precision for time synchronization on the physical…

Installing, Configuring, and Setup

Question

An administrator has been notified that a number of hosts are not compliant with the company policy for time synchronization. The relevant portion of the policy states:

All physical servers must synchronize time with an external time source that is accurate to the microsecond. Which step should the administrator take to ensure compliance with the policy?

Options

  • AEnsure that each vCenter Server Appliance is configured to use a Network Time Protocol (NTP)
  • BEnsure that each ESXi host is configured to use a Precision Time Protocol (PTP) source.
  • CEnsure that each ESXi host is configured to use a Network Time Protocol (NTP) source.
  • DEnsure that each vCenter Server Appliance is configured to use a Precision Time Protocol (PTP)

How the community answered

(41 responses)
  • A
    2% (1)
  • B
    83% (34)
  • C
    10% (4)
  • D
    5% (2)

Why each option

To comply with a policy requiring microsecond-accurate time synchronization for physical servers, the administrator must configure the ESXi hosts to use Precision Time Protocol (PTP). PTP provides the necessary high precision for time synchronization on the physical infrastructure.

AEnsure that each vCenter Server Appliance is configured to use a Network Time Protocol (NTP)

vCenter Server Appliance manages the virtual environment but is not the physical server (ESXi host) where workloads run, and NTP does not guarantee microsecond accuracy.

BEnsure that each ESXi host is configured to use a Precision Time Protocol (PTP) source.Correct

Precision Time Protocol (PTP) is specifically designed to provide extremely accurate time synchronization, typically down to the sub-microsecond level, which directly meets the policy's requirement for microsecond accuracy. Configuring ESXi hosts, which are the physical servers in a virtualized environment, to use a PTP source ensures their time is precisely synchronized.

CEnsure that each ESXi host is configured to use a Network Time Protocol (NTP) source.

Network Time Protocol (NTP) typically provides time synchronization accuracy in the millisecond range, which does not meet the policy's strict microsecond accuracy requirement.

DEnsure that each vCenter Server Appliance is configured to use a Precision Time Protocol (PTP)

vCenter Server Appliance manages the virtual environment but is not the physical server (ESXi host) where workloads run, and PTP is primarily for highly accurate host time synchronization, not typically for vCenter Server itself.

Concept tested: ESXi host time synchronization with PTP for microsecond accuracy

Source: https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-esxi-and-vcenter-server-80-monitoring-performance/GUID-3C34F995-1D21-4A55-88A7-873099901406.html

Topics

#Time synchronization#NTP#PTP#ESXi host configuration

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