What is MDNSResponder.exe
MDNSResponder.exe known as Bonjour is a configuration networking process developed by Apple for their devices; originally existing exclusively on the MacOS that was eventually ported over to Windows under the mdnsnsp.dll. On iOS and Mac devices, this particular program is responsible for all things networking. On Windows based computers, this process is only used for the sharing libraries through iTunes, and other Mac programs (such as Apple TV) that have been ported to the Windows operating system.