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@ -9,6 +9,7 @@ With the rise of governmental monitoring programs, Tox, a FOSS initiative, aims
## The Complex Stuff:
### UDP vs. TCP
Tox must use UDP simply because [hole punching](http://en.wikipedia.org/wiki/UDP_hole_punching) with TCP is not as reliable.
However, Tox does use [TCP relays](https://github.com/irungentoo/ProjectTox-Core/blob/master/docs/TCP_Network.txt) as a fallback if it encounters a firewall that prevents UDP hole punching.
### Connecting & Communicating
Every peer is represented as a [byte string][String] (the public key [Tox ID] of the peer). By using torrent-style DHT, peers can find the IP of other peers by using their Tox ID. Once the IP is obtained, peers can initiate a [secure](https://github.com/irungentoo/ProjectTox-Core/wiki/Crypto) connection with each other. Once the connection is made, peers can exchange messages, send files, start video chats, etc. using encrypted communications.