http://dds6qkxpeiqvogt4y2fd7vtsxq6pvokekb2h4la7jd4iwl4ljuawu5qd.onion/wiki/Dev/Technical_Introduction
(TCP is a common protocol used for stable internet connections.) For further details, see Tor wiki page, chapter UDP . For DNS, please refer to the next footnote. ↑ Tor does not depend on, nor use, a functional (system) DNS for most of its operations.