VMware Certified Professional - Data Center Virtualization (VCP-DCV) Practice Exam

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After changing the hostname and using a static IP for a migrated vCenter Server Appliance, what should the administrator do to prevent service failures?

Regenerate the SSL certificates.
Re-register components to Single Sign-On.
Update the /etc/hosts file.
Execute the command services.restart vmware-vpxd.

The correct answer is: Regenerate the SSL certificates.

Regenerating the SSL certificates is crucial after changing the hostname and static IP address of a migrated vCenter Server Appliance to prevent service failures. The vCenter Server Appliance relies on SSL certificates to secure communications between its various components and with clients. When you change the hostname or IP address, the existing certificates become invalid since they are tied to the previous hostname and IP address. If the certificates are not updated, services that depend on secure communications may fail or be unable to connect, resulting in operational disruptions. In addition to SSL certificates, other actions like updating the /etc/hosts file could also be necessary to ensure proper name resolution within the environment, but it does not directly address the security implications connected to SSL communications. Re-registering components to Single Sign-On may be needed under different circumstances, but the immediate concern after a hostname or IP change is the validity of the SSL certificates. Restarting the VMware vCenter Server service would help in applying changes but does not resolve the foundational issue of the SSL certificates being outdated. Thus, regenerating the SSL certificates is the essential step to ensure smooth operation after such changes.