多项选择题 An administrator has purchased monitoring software that can be configured to alert administrators when hardware and applications are having issues. All devices are configured with SNMP， but the administrator wants to further secure the SNMP traffic.  Which of the following settings would BEST provide additional monitoring security？（）

单项选择题 A company has 100GB of data that needs to be automatically backed up daily, and needs to be stored for 20 years. Which of the following backup media is the BEST solution for archiving the server data?（）

单项选择题 Which of the following technologies can detect and fix single bit memory errors?（）