Re: Application knowledge of transport characteristics (was: Re: Domain

On 2007-7-5, at 19:07, ext Tom.Petch wrote:
> If we had a range of transports (perhaps like OSI offered), we  
> could choose the
> one most suited.  We don't, we only have two, so it may become a  
> choice of one
> with a hack.  But then that limited choice may be the reason why  
> the Internet
> Protocol Suite has become the suite of choice for most:-)
We have four standards-track transport protocols (UDP, TCP, DCCP and  
SCTP), and, FWIW, SCTP has a concept of record boundaries.
Designers of applications and higher-layer protocols still have a  
tendency to ignore SCTP and DCCP and the particular features they can  
offer to applications. This can make applications more complex,  
because they need to re-invent mechanisms that a more appropriate  
transport protocol would have provided.
Lars

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