单项选择题
The interface is up and protocol is up. What level of logging is enabled when you get these messages？（）
A.alerts B.errors C.critical D.notifications
YouhavetwoNTPservers10.1.1.1&10.1.1.2andwanttoconfigure...
问答题You have two NTP servers 10.1.1.1 & 10.1.1.2 and want to configure a router to use 10.1.1.2 as its NTP server before falling back to 10.1.1.1. Which command will you use？
The following commands are issued on a Cisco router： W...
The following commands are issued on a Cisco router： What would be the output shown on the console？（）
A.All IP packets passing through the router B.Only IP packets with the source address of 10.1.1.1 C.All IP packets from 10.1.1.1 to 172.16.1.1 D.All IP packets between 10.1.1.1 to 172.16.1.1
WhichtwoofthefollowingoptionsarecategoriesofNetworkMain...
多项选择题Which two of the following options are categories of Network Maintenance tasks？（）
A.Firefighting B.Interrupt-driven C.Policy-based D.Structured E.Foundational
