Gigabit interface converter (GBIC) refers to a certain type of modular transceiver that is typically used to connect a device, such as a switch or router, to a network via a fiber optic or copper cable. GBIC modules can support various types of network protocols and data rates, including Gigabit Ethernet, Fast Ethernet, Fibre Channel, and ATM.
GBICs have largely been replaced by the smaller and more advanced Small Form-Factor Pluggable (SFP) modules, which offer similar functionality but with a smaller form factor. However, some older networking equipment still uses GBIC modules, and they continue to be used in certain specialized applications.
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