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Old 08.12.2007, 00:16
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Re: Internet issues / choices in Switzerland / ADSL vs cable

Well I didn't mean to hijack this thread into a big technical discussion on protocols. Main points - TCP can't be multicasted because it's connection-orientated, but UDP can (because it's not). Main point here is that everyone who is getting internet TV via their internet connection is not getting it multicasted. Why not? Multicast would never get through the routers which they bought at media markt. So unless the provider itself has put in the box which connects to the outside world it's not multicast. Most likely scenario - provider multicasts to a box/process in the local network segment (or DSLAM in the case of ADSL). This box/process then *unicasts* to anyone who wants it. This way the provider still cuts down massively on the number of streams, and solves their technical issues with clients / customer routers at the same time. All pretty straight-forward if you think about it.

And yes, once we all agree it's unicast, you can run whatever the hell protocol you like!

But why talk about the TV channels we get from Cablecom? These are the guys that took the BBC away from us. They are hardly going to give it back to us as one of the 6 or 14 channels that they are going to let us watch via the internet, are they? So unless you like watching stuff in German/Swiss German/French this feature will be of little interest to EF readers.
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