DCS world seen as having network activity although I am playing single player !

Hello,
I tried to have a look on DepthBuffer feature of Reshade wiht DisplayDepth shader. But dsiplay was uniform.
Reshade write there is network activity, in fact in task mamanger there is a bit of network activity for DCS.exe, but I just launched a single mission on my PC, I'm not connected to a mutliplayer server !