[e2e] Types Of Service
fernando at gont.com.ar
Thu Jul 31 13:22:03 PDT 2003
At 16:34 28/07/2003 -0700, you wrote:
> *> However, only TCP, UDP, and RTP (which is built over UDP) come to my
> *> they don't guarantee any specific type of service (for example, "low
> *> delay", "high throughput", etc.) by themselves.
>But in principle, they could. The original IP specification DID
>include a TOS byte with delay and throughput bits.
Yes, but it didn't *guarantee* the service.
> *> Besides that, for example, TCP provides a "realiable" byte stream.
> *> there are some errors that TCP won't catch, so if reliability is a real
> *> issue, then another layer of error control must be built up on top
> of TCP.
>Presumably you are referring to local system errors between TCP and the
>applications. This would ultimately have to be dealt with at the
>application layer, of course (see the classic E2E argument paper.)
What's the author/title of that paper? Is it available online?
>Or are you referring to the weakness of the TCP checksum?
Yes, that's what I was referring to.
e-mail: fernando at gont.com.ar || fgont at acm.org
More information about the end2end-interest