1. The network segment connected to each port of the switch is an independent conflict domain.
2. The devices connected to the switch are still within the same network, that is, the switch does not block distance broadcasts (the only exception is in the case of VLANs).
3. The switch needs to be viewed according to the information in the frame header, so the switch is a network device working at the data link layer (the switch mentioned here only refers to the traditional two-layer exchange device).
