According to the dual-system hot backup networking diagram, which of the following statements is incorrect regarding the dual-system hot backup preemption function?
A . The VRRP backup group has its own preemption function. As shown in the figure, after USG_A fails and recovers, USG_A uses the preemption function to revert to the master state.
B . The preemption function of the VGMP management group is similar to that of the VRRP backup group. When the fault of a backup group in the management group recovers, the priority of the management group is also restored.
C . By default, preemption function is disabled
D . After the VRRP backup group is added to the VGMP management group, the original preemption function on the backup group will become invalid. The preemption behavior must be determined by the VGMP management group.
Answer: C
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