 Frame type – 01 indicates LLC frame IEEE 802.2 (data) and ignore control bits; 
00 indicates MAC frame and control bits indicate the type of MAC control frame



A = 1, Address recognized
C = 1, Frame copied

Every station in a Token Ring network is either an active monitor (AM) or standby monitor (SM) station.There can be only one active monitor on a ring at a time.The active monitor is chosen through an election or "monitor contention" process.