单项选择题
You enabled CDP on two Cisco Routers which are connected to each other. The Line and Protocol statusfor the interfaces on both routers show as UP but the routers do not see each other a CDP neighbors.Which layer of the OSI model does the problem most likely exist？（）
A.Physical
B.Session
C.Application
D.Data-Link
E.Network
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相关考题
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单项选择题
The following command is issued on a Cisco Router： Router（configuration）#logging console warnings Which alerts will be seen on the console？（）
A.Warnings only
B.debugging， informational， notifications， warnings
C.warnings， errors， critical， alerts， emergencies
D.notifications， warnings， errors
E.warnings， errors， critical， alerts -
单项选择题
Youhave2NTPserversinyournetwork-10.1.1.1and10.1.1.2.YouwanttoconfigurationureaCiscoroutertouse10.1.1.2asitsNTPserverbeforefallingbackto10.1.1.1.Whichcommandswillyouusetoconfigurationuretherouter？（）
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？（）
A.alerts
B.critical
C.errors
D.notifications
