“The video/voice communication through Skype is established through UDP. The trick here is that quite often, one of the users is behind a firewall or a router, hence it doesn’t have a real IP address. But if both Skype clients are on real IPs, then the media traffic flows directly between them over UDP…”
“If one of the callee or both of them do not have a public IP, then they send voice traffic to another online Skype node over UDP or TCP.” Can anyone explain this statement. I did not understanf how they manage to find each other?
Article Source: http://EzineArticles.com/496462
Article Source: http://EzineArticles.com/496462
The clients can communicate via Skype login server and supernodes.
More details about Skype protocol:
http://en.wikipedia.org/wiki/Skype_protocol