单项选择题 While executing a Cluster Test Plan， the administrators realize that they will need to email the  Operations and network on-call staff in the event of a network outage.  What can be done to alert the on-call staff of network failures？（）

单项选择题 Company.com performs a cluster verification on a regular basis. Cluster verification is successfulbut the cluster sometimes fails to start the applications during a fallover. Investigation of the issue has revealed that the non-shared component of the application configuration information is not being kept up to date on the secondary nodes.  What can be used to help resolve this issue？（）

单项选择题 During an internal IT organization planning session， it is decided that a new cluster node would  Enhance the performance of a distributed corporate application. Planning details have been assigned to the administrator. System outages are limited to one weekend per month； therefore， availability will be a key issue in the planning process.  How much cluster downtime will need to be allocated for adding a new node？（）