For the fiber one, single mode fiber (SMF) and multimode fiber (MMF), 1GE and 10 GE speed are all compatible. Counting to this feature, SFP ports empower SFP switches the switching function to connect various Ethernet and fiber cables through the network. When SFP ports are plugged by SFP optical modules with optical ports, fiber patch cables are required for data transmission. When SFP ports on SFP switches are inserted into SFP modules with electrical ports, Ethernet copper cables (Cat5e/Cat6/Cat7) are needed for data transmission. Different from RJ45 ports for copper connection only, SFP ports on SFP switch support both copper and optical links. It is typically built in 10Gb switch with SFP+ uplinks. SFP port (mini-GBIC port), a small form-factor hot pluggable interface, is designed for high speed and density SFP connection. This article will focus on the understanding of SFP ports on SFP switch. But how about SFP port? SFP port is built-in interface in various devices including gigabit switch, SFP switch, network interface card (NIC). For instance, we got USB interfaces in cellphones and RJ45 ports in copper switch.

Catching a glance of the modern network devices, one will see different ports are built in for different connection.

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