Optical modules enable high-speed data transmission over fiber optic cabling. Technologies such as SFP, SFP+, SFP28, QSFP28, and QSFP-DD are now essential components in enterprise LANs, campus networks, metro fiber systems, storage fabrics, and modern AI cluster networking. The SFP+ port is a high-speed optical-to-optical signal conversion port, mainly used for 10G Ethernet and Fiber Channel network applications. A key advantage of SFP+ Modules is that they are "hot-swappable", meaning they can be swapped out while the router is still powered on. In. SFP ports support Ethernet switches to connect to a wide variety of Ethernet cables and connectors in order to extend functionality in the network. As a hot-pluggable / hot-swappable I/O device, it supports both RJ45 and fiber type modules, extending the flexibility beyond RJ45 and fixed fiber. Many telecom operators and Internet service providers use Active Ethernet technology to connect remote offices and private homes via an optical line. The effective length of the optical communication line is limited only by the type of SFP module used (and could reach up to 80 km); while using a. The LINK and ACT LEDs are located next to each port. Table 2 describes the functions of these LEDs. Port is on with no alarms or errors.
