While Bonjour 3.1.0.1 remains functional for legacy systems, consider upgrading to the latest Bonjour version (shipped with recent iTunes or Apple Software Update) if you need security fixes, improved Windows 10/11 compatibility, or better performance.
Bonjour version 3.1.0.1 was released around the time of and the introduction of Windows 10. For many years, this version served as the backbone of Apple's networking on Windows. bonjour 3.1.0.1 for windows