pytorch1.7.1+cuda11.0

If I want to run pytorch with CUDA, what is the minimum cuda environment? (C++/CUDA extension is not required). Should I install all CUDA libraries? (cuNPP, cuSPARSE, cuBLAS, NCCL etc.)
And, Does the torch-1.7.1+cu110-cp36-cp36m-linux_x86_64.whl contains a cuDNN lib? Should I install an additional package If I want to use cuDNN in pytorch?