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An administrator is upgrading a vCenter Server Appliance and wants to ensure that all the prerequisites are met.
What action must be taken before upgrading the vCenter Server Appliance?
A. Install the Client Integration Plug-in.
B. Install the database client.
C. Install the ODBC connector.
D. Install the Update Manager Plug-in.
Correct Answer: A
Explanation/Reference:
Explanation:
Prerequisites
■ Verify that the clocks of all machines on the vSphere network are synchronized. See Synchronizing Clocks on the vSphere Network.
■ Verify that the target ESXi host on which you deploy the vCenter Server Appliance is not in lockdown or maintenance mode.
■ Verify that you have sufficient free disk space on the vCenter Server Appliance that you want to upgrade to accommodate the data for the upgrade.
■ Verify that port 22 is open on the vCenter Server Appliance that you want to upgrade. The upgrade process establishes an inbound SSH connection to download the exported data from existing appliance.
■ Verify that port 443 is open on the source ESXi host on which the vCenter Server Appliance that you want to upgrade resides. The upgrade process establishes an HTTPS connection to the source ESXi host to verify that the vCenter Server Appliance is ready for upgrade and to set up an SSH connection between the new and the existing appliance.
■ Verify that the vCenter Server SSL certificate for your existing vCenter Server Appliance is configured correctly. See VMware Knowledge Base article 2057223.
■ If you use an external database, back up the vCenter Server Appliance database.
■ Create a snapshot of the vCenter Server Appliance that you want to upgrade.
■ Install the new version of the Client Integration Plug-In. SeeInstall the Client Integration Plug-In.
Reference: https://pubs.vmware.com/vsphere60/index.jsp?topic=%2Fcom.vmware.vsphere.upgrade.doc%2FGUID-6A5C596D-103E-4024-9353-5569263EB427.html