The Cisco SFP-10G-SR-S is a small form-factor pluggable (SFP) transceiver module manufactured by Cisco Systems. It is designed for use in high-speed data communication networks and supports 10 Gigabit Ethernet (10GbE) connections. The "SR" in the model name stands for "short reach," indicating that it is optimized for short-range transmission. The "S" at the end denotes that it is a Cisco original product. The SFP-10G-SR-S operates over multi-mode fiber optic cables and has a maximum reach of up to 300 meters. It uses a wavelength of 850nm and supports data rates of up to 10 Gbps. This transceiver module is commonly used in data centers, enterprise networks, and telecommunications environments to connect switches, routers, and other networking devices.