Vitaliy wrote:
> Olin Lathrop wrote:
> > ... you have to think carefully about what the receiving node might
> > do if it receives two separate valid commands. A sequence number is
> > the usual way around this, but there are other strategies.
> 
> - Avoid "vague" commands ("toggle") in favor of more specific ones
>   ("turn off")

Specifically, look up the term "idempotent", especially as it applies to
computer networks.

-- Dave Tweed
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