多项选择题
A.to verify the type of cable interconnecting two devices
B.to determine the status of network services on a remote device
C.to obtain VLAN information from directly connected switches
D.to verify Layer 2 connectivity between two devices when Layer 3 fails
E.to obtain the IP address of a connected device in order to telnet to the device
F.to determine the status of the routing protocols between directly connected routers
多项选择题 Which two locations can be configured as a source for the IOS image in the boot system command?（）
多项选择题 A network administrator is explaining VTP configuration to a new technician. What should the network administrator tell the new technician about VTP configuration? （）
多项选择题 由图所示FMJ公司注意到有未授权的访问服务器的现象，但是只有Accounting1，CEO，Mgr1，Mgr2，是允许访问Payroll Server的，以下哪两种技术可以避免对服务器的未授权的访问？（）