GE interface refers to Gigabit Ethernet Gigabit Ethernet interface, and the interface marked with GE means 1000M Ethernet network interface;
SFP is a 100M or Gigabit module, which is divided into multimode module and single-mode module. In the single-mode module, it is divided into transmission distances of 10KM, 40KM and 80KM.
FE is expressed as 100 trillion, GE as gigabit, 10G as 10 trillion; FE and GE are SFP, and 10G is XFP.
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Gigabit switches designed with GBIC interface occupy a large market share because of their flexible switching. SFP (Small Pluggable) can be simply understood as an upgraded version of GBIC.
SFP (Small Pluggable Device) can be simply understood as an upgraded version of GBIC. SFP module (the volume is reduced by half compared with GBIC module, and the number of ports on the same panel can be more than doubled. Because SFP module is basically the same as GBIC in function, it is also called Miniaturized GBIC by some switch manufacturers.
SFP module further reduces the size and power consumption by placing CDR and electric dispersion compensation outside the module. Which is use for optical communication applications in telecommunication and data communication. SFP connects the mainboards of network devices such as switches and routers through optical fibers or UTP cables. SFP is an industrial specification supported by some optical fiber equipment providers.
SFP supports SONET, Gigabit Ethernet, Fibre Channel and other communication standards. The standard is extended to SFP+ to support 10.0 Gbit/s transmission rate, including 8 Gigabit Fibre Channel and 10GbE.
Optical fiber and copper core SFP+ modules are introduced. Compared with modules in Xenpak, X2 or XFP versions, SFP+ modules keep some circuits in the motherboard instead of the module.
References:
Baidu encyclopedia -SFP