Bridging and wi devices

[Jon Schneider]

As I understand it there are two sorts of bridge. Somebody please 
confirm or correct me.

The low level type just understands an ethernet frame, that a frame 
has a MAC address and uses this to make up tables and pass 
things intelligently. Works whether it is IPX, IP or whatever on top. 
It must run the interface promiscuously to capture frames destined 
for another MAC address.

The higher level type might understand say only IP and 
manipulates ARP packets such that it takes frames for stuff on the 
other side. Or does it ? I would have thought it need not be 
promiscuous though this seems not to be the case.

	Jon