管理者の Ann は、デプロイされる 2 ノード クラスタを構成しています。クラスターの機能を確認するために、彼女はアクティブ ノードをシャットダウンします。クラスタの動作は予想どおりで、パッシブ ノードがアクティブになりました。Ann はサーバーの電源を再び入れ、元の構成に戻したいと考えています。次のクラスター機能のうち、Ann がこのタスクを完了できるのはどれですか?
正解:B
The cluster feature that will allow Ann to complete her task is failback. A cluster is a group of servers that work together to provide high availability, scalability, and load balancing for applications or services. A cluster can have different nodes or members that have different roles or states. An active node is a node that is currently running an application or service and serving requests from clients. A passive node is a node that is on standby and ready to take over if the active node fails. A failover is a process of switching from a failed or unavailable node to another node in a cluster. A failback is a process of switching back from a failover node to the original node after it becomes available again. Failback can be automatic or manual depending on the cluster configuration.