Typical bandwidth is 10 MHz, but 100MHz is possible with fiber or category five twisted pair. If two nodes transmit at the same time, a collision occurs and both wait and try again later. FCS - see Frame Check Sequence. Interface - A physical and data link control LAN standard. Bandwidth is 100 MHz.
Data link control involves counter-rotating token rings, one of which is a backup at any given time.
FDM - Frequency Division Multiplexing. Flow Control - any means of regulating the rate at which data is passed. Framing Error - see Alignment Error. FM - Frequency Modulation. FTP - File Transfer Protocol.