SCB Single-copy broadcast
SDH Synchronous digital hierarchy
SERDES Serializer–deserializer
SFD Start frame delimiter
SFI-4 SERDES–framer interface, Release 4
SFP Small form factor pluggable
SLA Service level agreement
SLD Start LLID Delimiter
SOA Semiconductor optical amplifier
SOAM Service provider OAM
SONET Synchronous Optical NETwork
SPE Synchronous payload envelop
SRS Stimulated Raman scattering
STP Spanning Tree Protocol
S-VLAN Service VLAN
TDM Time-division multiplexing
TTL Time to live
UDLR Unidirectional link routing
UNI User network interface
UTP Unshielded twisted pair
VCAT Virtual conCATenation
VID VLAN ID
VLAN Virtual bridged LAN
VOIP Voice over IP
WDM Wavelength-division multiplexing
WIS WAN interface subl ayer
XAUI 10 Gigabit Attachment Unit Interface ...