What is the port on the network card that connects to the optical module called

The port on a network card that connects to an optical module is called an SFP (Small Form-factor Pluggable) port, or SFP+ for higher-speed applications.OverviewAn SFP port is a compact, hot-swappable interface on networking devices such as network interface cards (NICs), switches, routers, and servers that accepts an SFP module insert for high-speed data transmission over fiber-optic or copper cables . The SFP port allows flexible network configurations by supporting different types of transceivers, including single-mode and multi-mode fiber modules, as well as copper-based modules.SFP vs SFP+SFP (Small Form-factor Pluggable): Typically supports speeds up to 1 Gbps and can handle both fiber and copper connections .SFP+: An enhanced version of SFP, designed for 10 Gbps Ethernet and Fiber Channel applications, offering higher bandwidth while remaining hot-swappable .FunctionalityThe SFP port converts electrical signals from the network card into optical signals for transmission over fiber, or vice versa, depending on the module type . This modular design allows network administrators to easily upgrade or replace modules without powering down the device, providing flexibility and scalability for data center and enterprise networks.UsageTo connect an optical module:Ensure the module type matches the port (SFP or SFP+) and the fiber type (single-mode or multi-mode).Insert the optical module into the SFP port securely.Connect the fiber-optic cable to the module using the appropriate connector, taking care to avoid bending or contaminating the fiber . SFP ports are widely used in NICs, switches, routers, and fiber media converters, enabling high-speed, long-distance network connections while maintaining compatibility with various networking standards .