PC01 can ping PC02, there is a great god can explain why?

CodePudding user response:

The problem of good magic

CodePudding user response:

To learn a concept of the VLAN is understood,

CodePudding user response:

PC01 sending data frames to SW1 access interface, will hit the port VLAN ID, which is the tag,
From the trunk interface, the default is to allow all VLAN by trunk interface, which allows all the TAG,
SW2 receives the access interface, access interface receives a frame with the tag will divest its tag, then data frames to SW2 is a frame without the tag, broadcast, PC02 will have received, actually you accept a PC03 SW2 in again, and then catch PC03 interface package, you can see this broadcast frames