nanog mailing list archives
Re: Why doesn't BGP... -Reply
From: "Alex.Bligh" <amb () xara net>
Date: Sun, 17 Nov 1996 12:05:29 +0000
Larry J. Plato <ljp () ans net> wrote:Connectionless and Connection oriented both refer to packet switched technologies, whereas the phone company uses circuit switched technology.
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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
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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 - - - - - - - - - - - - - - - - -
Current thread:
- Re: Why doesn't BGP..., (continued)
- Re: Why doesn't BGP... Vadim Antonov (Nov 12)
- Re: Why doesn't BGP... -Reply Avi Freedman (Nov 12)
- Re: Why doesn't BGP... -Reply Jon Zeeff (Nov 12)
- Re: Why doesn't BGP... -Reply Alex.Bligh (Nov 12)
- Re: Why doesn't BGP... -Reply Larry J. Plato (Nov 16)
- Re: Why doesn't BGP... -Reply Allan Chong (Nov 17)
- Re: Why doesn't BGP... -Reply dave o'leary (Nov 18)
- Re: Why doesn't BGP... -Reply Alex.Bligh (Nov 17)
- Re: Why doesn't BGP... -Reply Curtis Villamizar (Nov 20)
- Re: Why doesn't BGP... -Reply Alex.Bligh (Nov 20)