Which of the following statements concerning AC N+1 backup is true?
Huawei's N+1 AC backup mode is a redundancy scheme in which a dedicated backup AC protects several active ACs; when an active AC fails its APs fail over to the shared backup AC, and once the original active AC recovers, the APs can switch back to it, so active/standby switchover and switchback are both supported, unlike real-time user-data synchronization or simultaneous multi-AC CAPWAP tunnels, which are not features of this mode.
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