>Anyone knows ? Yeah, bridges.
https://www.torproject.org/docs/bridgesBut I remember I once read on their website bridges are not a perfect solution being that if your ISP really wants to analyze deeply your traffic it will know you use Tor even when 'bridges'.. Bridges are mostly used to circumvent Tor censorship. Tor nodes are publicly listed and well known, bridges are not, so to connect to Tor in case your ISP censors you you use a bridge.
