1. Glossary and Terms (Download PDF)

2. A usful list of Acronyms 
A B C D E F G H I J K L M N O P Q R S T U V W X   
FCFS    First Come First Served
FCS     Frame Check Sequence (CRC)
FDDI    Fibre Distributed Data Interface
FDM     Frequency Division Multiplexing
FEC     Forward Error Correction (in the context of error control)
FEC     Forwarding Equivalence Class (in the context of MPLS)
FECN    Forward ECN
FIFO    First In First Out
FR      Frame Relay
FRF     FR Forum
FTP     File Transfer Protocol