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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Why doesn't BGP... -Reply
> Larry J. Plato <[email protected]> wrote: > > >Connectionless and Connection oriented both refer to packet switched > >technologies, whereas the phone company uses circuit switched technology. ... > > This is a terminological question. Here the talk was about connectionless > and connection-oriented _network_ layer; not the transport layer. > > The connection-oriented packet routing network is a generalized case > of circuit switching -- you can multiplex connections differently. > > The fundamental difference between connectionless and connection-oriented > networks is the amount of state necessarily kept by gateways in order ... > >SS7 (Signalling System 7) is a connectionless packet switched technology > >used to control the setup and teardown of circuit switched calls. > >Originally is was used as a database query technology to make 800 > >numbers portable across carriers. If this did not make sense I can descibe > >it in a little mnore detail offline. > Vadim makes my point better than I did - SS7 etc. make their routing decision OTO once per call (on call setup). IP makes it once per packet. Therefore you can put a lot more effort into finding the correct route if you only have to perform the calculation once. This was an algorthmic point not a network/transport layer point. Alex Bligh Xara Networks - - - - - - - - - - - - - - - - -
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