(It is used for some customers of enterprises and institutions to distinguish the network management status of multiple VLANs. In order to deploy the Tianyicheng network management system very well, everyone advocates the monitoring method of the bridge mode, which is to use dual network cards to access the Internet and install the monitoring software in the network. On the computer that uses the bridge to access the Internet, you can completely control all the local area networks. This method is suitable for any network environment and has powerful functions.)