It would help to know what kind of platform you are asking about and what context this question deals with. But in general this is the difference: routed mode indicates that data will be forwarded based on layer 3 addresses and a forwarding table built by a routing protocol which advertises layer 3 networks and subnets. Bridge mode indicates that data will be forwarded based on layer 2 address and a forwarding table built with bridging logic which looks at the layer 2 addresses (MAC addresses) of traffic passing through the device.
HTH
Rick
HTH
Rick
