SANGFOR IAM v2.1 User Manual243.4.2. Bridge ModeBridge-mode deployment takes the IAM gateway device as a network cable with filtering function.This mode is usually applied where the original topology of the network is inconvenient to bealtered.The IAM gateway device locates between the original gateway and the LAN users, no change tobe made on the original gateway and the LAN users. It seems the original gateway and the LANserver cannot feel the existence of the IAM device. It is what we call “Transparent” deploymentfor the original gateway and the LAN users.Bridge-mode deployment features traversing the data of the data link layer, absolutely transparentto the users. Generally, if the IAM gateway is deployed as that shown in the following figure,Bridge mode is recommended.