Re: how exactly UDP tunneling works...

From: Alun Jones [MS MVP] (alun_at_texis.invalid)
Date: 02/26/04

  • Next message: jt: "Re: Overlapped IO (Sockets) and _beginethreadEx" 
    Date: Thu, 26 Feb 2004 02:52:48 GMT

    In article <OW8YJJq#DHA.2040@TK2MSFTNGP12.phx.gbl>, "Arkady Frenkel"
    <arkadyf@hotmailxdotxcom> wrote:
    >That's interesting , I don't know , let's wait for gurus to answer , but
    >that sounds strange because UDP is not reliable protocol opposite to TCP (
    >many routers allow configuration not allowed UDP to pass because of that ).

    Don't forget that IP (which TCP is usually carried over) is itself an
    unreliable protocol. Carrying TCP over UDP would pose no significant
    challenge.

    Carrying UDP over TCP does have some issues, mainly that you "lose" that
    unreliability - UDP protocols that are designed to accomodate some loss
    would generally be slowed down by the retries that TCP uses to guarantee
    reliability. A failing packet would hold up all subsequent data, even if
    that packet was one that the application protocol felt was not important
    enough to retry.

    Alun.
    ~~~~

    [Please don't email posters, if a Usenet response is appropriate.] 

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  • Next message: jt: "Re: Overlapped IO (Sockets) and _beginethreadEx"

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