[mythtv-users] Wireless Bridges and "Thinking it's wired"

Brian Wood beww at beww.org
Thu Feb 4 00:37:24 UTC 2010


On Wednesday 03 February 2010 05:03:32 pm Tom wrote:
> At 04:16 PM 2/3/2010 -0700, you wrote:
> >It's true that using a wireless bridge will allow you to use the RJ-45
> > port, and in that respect the machine will "think" it is using a wired
> > connection.
> >
> >But it will NOT perform like a wired connection. It may work with TCP, but
> > is likely to have problems with UDP packets that have no error correction
> > and retransmission mechanism.
> >
> >Or do such bridges convert UDP to TCP and then back again? That would be
> >cool,
> >but unlikely.
> 
> I doubt it. I've never heard of any encapsulation that wraps a layer two
> protocol in another layer 2 protocol. Depending on whose OSI model you
> subscribe to, of course.
> 
> People (programmers, etc) use UDP because it's connectionless and light,
> fast, and not overburdened with layers of check-and-retry logic. If the
> packet didn't get through, the higher layers are free to retransmit, which
> is in general exactly what they do.
> 
> In other words, don't bring a knife to a gunfight.

Well put.

My point was that using a Wireless bridge is *not * the same thing as using a 
wired connection. It might work in a similar manner in some cases, but 
wireless is a very different animal from WiFi.


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