Term
Abbreviation
or Acronym
extended superframeESF
end system identifierESI
Encapsulating Security PayloadESP
experimental (refers to bits in MPLS shim header)EXP
F
file allocation tableFAT
Federal Communications CommissionFCC
frame check sequenceFCS
facilities data linkFDL
Fast EthernetFE
dual-port Fast EthernetFE-2
forwarding equivalence class (abbreviation pronounced “ feck” )FEC
forward explicit congestion notificationFECN
far-end receive failureFERF
frame forwarding ASICFFA
forwarding information baseFIB
first-in, first-outFIFO
finish (bit)FIN
field programmable gate arrayFPGA
fully qualified domain nameFQDN
field-replaceable unitFRU
finite state machineFSM
forwarding table entryFTE
File Transfer ProtocolFTP
G
gigabits per secondGbps
Gigabit EthernetGE
gateway IP addressgiaddr
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JUNOSe 11.1.x System Basics Configuration Guide