SFP (Small Form-factor Pluggable) is a small pluggable optical module used to transmit optical signals between network devices (such as switches, routers, servers, etc.). It is a standardized optical module interface that can be quickly replaced and upgraded to meet different network needs.
SFP modules have several specifications and protocols, common ones include:
1. Specifications:
SFP: Standard size SFP module used to transmit a single optical signal.
SFP+: SFP+ is an evolved version of SFP, providing higher data transfer rates and enhanced performance, and is commonly used for 10Gbps Ethernet transmission.
QSFP (Quad Small Form-factor Pluggable): QSFP is a larger optical module interface that can transmit multiple optical signals and is usually used for high-speed network connections, such as 40Gbps and 100Gbps Ethernet transmission.
QSFP+: QSFP+ is an evolved version of QSFP, providing higher data transmission rates and is usually used for 40Gbps Ethernet transmission.
QSFP28: QSFP28 is an evolved version of QSFP that supports higher data transmission rates and is typically used for 100Gbps Ethernet transmission.
2. Agreement:
Ethernet: The SFP module can support Ethernet protocols, including Gigabit Ethernet (1Gbps), 10 Gigabit Ethernet (10Gbps), 40 Gigabit Ethernet (40Gbps) and 100 Gigabit Ethernet (100Gbps), etc.
Fiber Channel (FC): SFP modules can also support the Fiber Channel protocol and are used in applications such as fiber optic storage networks (SAN).
The selection of these specifications and protocols depends on specific network requirements, such as bandwidth requirements, distance requirements, and network topology.
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