SFP is an abbreviation for Small Form-Factor Pluggable and can be easily understood as an upgraded version of GBIC. SFP volume is less than half the GBIC module, SFP and more than twice the number of ports can be configured on the same panel. SFP's other features are basically the same as GBIC. Some switch manufacturers said SFP for small GBIC (MINI-GBIC), support SX, LX, TX, LH, take 1000M.
Cisco Catalyst 3750G-24TS-1U-24 Ethernet 10/100/1000 ports and 4 SFP uplinks, of which 24 of the 24 electrical ports are interoperable with the SFP. SFP Do not know cisco is not, anyway, Alcatel switch is like this!
SFP (Small Form-factor Pluggables) can be easily understood as an upgraded version of GBIC.
SFP (less than half the volume of the GBIC module, you can configure more than twice the number of ports on the same panel.
As the SFP in function and GBIC basically the same, SFP but also by some switch manufacturers called miniaturized GBIC (Mini-GBIC).
SFP compresses the size and power consumption by placing CDR and electro-dispersion compensation outside the module. For optical communications applications in telecommunications and data communications. SFP network equipment such as switches, routers and other equipment, SFP motherboards and fiber or UTP cable. SFP is an industry specification supported by some fiber optic device providers.
SFP supports SONET, Gigabit Ethernet, Fiber Channel, and some other communication standards. This standard extends to SFP + and supports 10.0 Gbit / s transfer rates, including 8 gigabit Fiber Channel and 10GbE. Introducing the SFP + module version of the fiber and copper core versions, the SFP + module will keep some of the circuitry on the motherboard implementation, rather than within the module, SFP compared to the module's Xenpak, X2, or XFP version