单项选择题
You have 2 NTP servers in your network - 10.1.1.1 and 10.1.1.2. You want to configurationure a Ciscorouter to use 10.1.1.2 as its NTP server before falling back to 10.1.1.1. Which commands will you use toconfigurationure the router？（）
A.ntp server 10.1.1.1 ntp server 10.1.1.2 B.ntp server 10.1.1.1 ntp server 10.1.1.2 primary C.ntp server 10.1.1.1 ntp server 10.1.1.2 prefer D.ntp server 10.1.1.1 fallback ntp server 10.1.1.2
单项选择题 What level of logging is enabled on a Router where the following logs are seen？（）
单项选择题 The following commands are issued on a Cisco Router： What will the debug output on the console show？（）
问答题 whatwillhappenifuconfiguretworouterasNTPserver（somethinglikethat）.
