When performing software and configuration backups, which of the following is correct?

• A.After the configuration of the device is changed, there is no need to back up the configuration file
• B.The purpose of backup is to restore network function in extreme cases
• C.License does not need to be backed up
• D.The software version should be backed up, and the same product and the same version should be backed up multiple times

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What types of Link Types are included in the Router LSA in OSPF? (Multiple choice)

• A.TransNet
• B.StubNet
• C.P-2-P
• D.Vlink

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In the process of viewing the debug output through the SSH terminal, a lot of information pops up. Which of the following operations can make the monitor terminal no longer pop up the debug message? (Multiple choice)

• A.Open Notepad and enter undo terminal monitor
• B.Exit the current Monitor interface, re-SSH into the device to open the new Monitor interface
• C.Open Notepad and enter undo terminal debugging
• D.Open Notepad and enter undo debugging all

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Configuring DHCP Snooping can be used to prevent copycat attacks. Which of the following steps need to be included in the configuration process? (Multiple choice)

• A.Enable the global DHCP snooping function
• B.Enable DHCP Snooping on an interface or VLAN
• C.Enable the global DHCP function
• D.Configure the interface trust state

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The operation process for putting the equipment on the shelf is to prepare the tools first, then install the mounting ears, install the floating nuts and slides according to the site conditions, and finally install the equipment to the cabinet.

• A.False
• B.True

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