(After doing the above office work, all devices should be able to communicate with each other. The following are some commands to be mastered in this experiment. Use showcdpneighbors to view device and interface information adjacent to the device under test. Use showcdpneighborsdetail to view the ip of neighboring devices. So: just know the password of each device, you can draw the devices and interfaces connected to each device. so have to)
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