Cisco QDD-400G-FR4-S

The Cisco QDD-400G-FR4-S is a pluggable transceiver module designed for high-speed data transmission in data center and networking environments. It is part of Cisco's portfolio of 400 Gigabit Ethernet (400G) transceivers. The "QDD" in the product name stands for Quad Small Form Factor Pluggable Double Density (QSFP-DD), which refers to the form factor of the transceiver. QSFP-DD is a compact and high-density transceiver form factor that supports higher data rates compared to its predecessor, QSFP28. The "400G" indicates that the transceiver is capable of transmitting data at a rate of 400 Gigabits per second. This makes it suitable for high-bandwidth applications that require fast and reliable data transfer, such as cloud computing, big data analytics, and high-performance computing. The "FR4" in the product name stands for Fiber Optic Ribbon 4, which refers to the type of optical interface used by the transceiver. FR4 is a multi-mode fiber interface that supports transmission distances of up to 2 kilometers. Overall, the Cisco QDD-400G-FR4-S is a high-performance transceiver module that enables fast and efficient data transmission over short to medium distances in data center and networking environments.