SFP (Small Form-factor Pluggable) is a compact, hot-pluggable network interface module used to connect network devices (switches, routers, firewalls) to fiber optic or copper cables. 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. 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. Switches come in three types: those with purely Ethernet ports, those with purely optical ports, and those with a combination of both. Optical modules typically have an electrical interface on the side that connects to the inside of the system and an optical interface on the side that connects to the outside.
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