What is the normal operating temperature of Huawei NetEngine 8000 M6 routers with DC power...

The Huawei NetEngine 8000 M6 series routers are designed for robust performance in various environmental conditions. For models with DC power supply , the normal operating temperature range is -20°C to +65°C .

Below is an explanation of the other options:

0°C to +45°C : This range is too narrow and does not reflect the router's actual capabilities.

-40°C to +65°C : This range applies to extreme environments and is typically associated with AC-powered models or specialized variants.

-20°C to +45°C : This range is incorrect for DC-powered models, as the upper limit is lower than the actual specification.

Thus, the correct answer is B , as the operating temperature for DC-powered NetEngine 8000 M6 routers is -20°C to +65°C .