2V0-21.23 Question 272
Single answerAn administrator is configuring time synchronization for an ESXi host in a vSphere environment to ensure consistent time settings across all hosts. The administrator wants to configure the host to synchronize time with an external NTP server, but notices that the time on the host drifts after every reboot. What is the most appropriate configuration to ensure reliable time synchronization?
- A
Manually set the time on the ESXi host and disable NTP service.
- B
Enable the NTP service and configure the ESXi host to use an external NTP server.
- C
Use the vSphere Client to synchronize time with the vCenter Server.
- D
Configure the ESXi host to synchronize time with the BIOS clock.
Show answer and explanation
Correct answer: B
Explanation
Time synchronization is critical in virtualized environments to ensure proper functioning of distributed systems and avoid issues such as log misalignment and authentication failures. Configuring the ESXi host to use an external NTP server and enabling the NTP service is the best practice to maintain reliable and accurate time synchronization.
- A. Incorrect.
Manually setting the time on the ESXi host and disabling NTP service is not recommended because the time will not remain consistent and will drift, especially in environments requiring precise time settings.
- B. Correct.
Enabling the NTP service and configuring the ESXi host to use an external NTP server ensures that the host synchronizes its time accurately with a reliable source, maintaining consistency across the environment.
- C. Incorrect.
Synchronizing time with the vCenter Server is an option, but it is not as reliable as using an external NTP server, especially if the vCenter Server itself does not have synchronized time.
- D. Incorrect.
Configuring the ESXi host to synchronize time with the BIOS clock is not a preferred option, as the BIOS clock is prone to drift and is not suitable for maintaining accurate time in production environments.