Which two circumstances would prevent the option of joining a Linked Mode group during vCenter Server installation? (Choose two).
A.
An administrator is installing the first of the vCenter Server instances.
B.
An administrator installed vCenter Server instances using different domain accounts.
C.
An administrator has vCenter Server instances in multiple domains
D.
An administrator is upgrading a VirtualCenter Server installation.
“The vCenter Server instances in a Linked Mode group do not need to have the same domain user login. The instances can run under different domain accounts. By default, they run as the LocalSystem account of the
machine on which they are running, which means they are different accounts.”
“The vCenter Server instances in a Linked Mode group can be in different domains if the domains have a two-way trust relationship. Each domain must trust the other domains on which vCenter Server instances are
installed.”
“You cannot join a Linked Mode group during the upgrade procedure when you are upgrading from VirtualCenter 2.x to vCenter Server 4.0. You can join after the upgrade to vCenter Server is complete”
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Explanation:
The following requirements apply to each vCenter Server system that is a member of a Linked Mode group:
DNS must be operational for Linked Mode replication to work.
The vCenter Server instances in a Linked Mode group can be in different domains if the domains have a two-way trust relationship. Each domain must trust the other domains on which vCenter Server instances are installed.
When adding a vCenter Server instance to a Linked Mode group, the installer must be run by a domain user who is an administrator on both the machine where vCenter Server is installed and the target machine of the Linked Mode group.
All vCenter Server instances must have network time synchronization. The vCenter Server installer validates that the machine clocks are not more than 5 minutes apart.
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