The QSFP-40G-SR-BD is a type of transceiver module used for 40 Gigabit Ethernet (40GbE) connections. The specific connector type associated with the QSFP-40G-SR-BD is often a duplex LC (Lucent Connector) connector. These connectors are commonly used in fiber optic networking applications.

The "BD" in QSFP-40G-SR-BD stands for "Bi-Directional," which implies that this transceiver module supports bidirectional communication over a single pair of fibers. Bidirectional transceivers are often used in situations where only a limited number of fiber strands are available for communication.

To connect the QSFP-40G-SR-BD transceiver to the network, you would typically use a fiber optic patch cord with duplex LC connectors on both ends. The LC connector is a small, rectangular connector that provides a reliable and widely used interface for fiber optic connections.

Always refer to the product documentation or specifications provided by the transceiver module manufacturer or supplier for precise information about connector types and compatibility. The specific connector type can vary between different transceiver modules, and it's important to ensure that the connectors on both ends of the link are compatible for proper connectivity.