Final answer:
Migration between vCenter Server instances requires Cross-vCenter vMotion and can also be done using Cold migration. vSphere Replication and vCenter Converter Standalone are not specifically designed for this purpose.
Step-by-step explanation:
Migration between vCenter Server instances requires the use of Cross-vCenter vMotion. This feature allows for live migration of virtual machines between different vCenter Server instances, maintaining their state and connectivity.
vSphere Replication is a technology used for replicating virtual machine data between different vCenter Server instances, but it is not specifically designed for migration purposes.
vCenter Converter Standalone is a tool used for P2V (Physical to Virtual) migrations, which are migrations from physical servers to virtual machines, and not for migrating between vCenter Server instances.
Cold migration refers to the process of migrating a virtual machine when it is powered off, and is another method that can be utilized for migrating between vCenter Server instances.