Cisco QSFP-40GE-LR4

The Cisco QSFP-40GE-LR4 is a transceiver module designed for high-speed data transmission over optical fiber networks. It is part of the Cisco Quad Small Form-Factor Pluggable (QSFP) family and supports a data rate of 40 Gigabit Ethernet (40Gbps). The "LR4" in the name stands for "Long Reach 4," indicating that it is designed for long-distance transmission. The module uses four wavelengths (1310nm) to transmit and receive data over single-mode fiber, allowing it to reach distances of up to 10 kilometers (6.2 miles). The Cisco QSFP-40GE-LR4 is commonly used in data centers, telecommunications networks, and other high-bandwidth applications where long-distance connectivity is required.