As of my last knowledge update in January 2022, I don't have specific information about a QSFP-40/100-SRBD module. The designation of "SRBD" is not a standardized term, and the specific details of a QSFP module can vary between manufacturers.

400G QSFP-DD

However, QSFP modules are commonly designed for specific applications and have standardized names based on the intended use. For example:

• QSFP-40G-SR4: This typically refers to a 40 Gigabit Ethernet Short-Range module using multimode fiber with a range of up to 150 meters.

• QSFP-100G-SR4: This typically refers to a 100 Gigabit Ethernet Short-Range module using multimode fiber with a range of up to 100 meters.

If "QSFP-40/100-SRBD" is a specific designation used by a particular manufacturer, it's crucial to refer to the official documentation or specifications provided by that manufacturer for accurate information on the module's characteristics, including its range and supported applications. The data rate, reach, and other specifications can vary, so it's important to have the specific details for the module in question.