What does the word "quiet" mean in this paragraph?

[could ildg]

Thank you very much.
I am not a native English speeker so I have problem when understanding
this sentense. Now I know that the word  "quiet" is an adjective and
I'm totally catch it. Thank you~

On 8/14/05, Peter Decker <pydecker at gmail.com> wrote:
> On 8/14/05, could ildg <could.net at gmail.com> wrote:
> > The paragraph is as below, I mark the word quiet with *** ***.
> > ___________________________________
> > One problem with distributed applications is that if no data arrives
> > over a long period of time, you need to wonder why. On one hand, it
> > could be that the other program just hasn't had any information to
> > send recently. On the other hand, the other program could have
> > crashed. TCP handles this problem by allowing you to send an "Are you
> > still alive?" message every so often to  ***quiet*** connections. The
> > way is to call setKeepAlive() with a value of true.
> > ___________________________________
> > Please tell me what does the word "quiet" mean, Thank you~
> 
> It means that the remote application has sent any data recently: 'if
> no data arrives over a long period of time'. We commonly say that two
> programs 'talk' to each other, or that one program 'tells' the other
> when it has received input. If these programs aren't 'saying'
> anything, they're considered to be 'quiet'. The paragraph you quoted
> is concerned with determining why the remote app hasn't 'said'
> anything in a while: has it crashed, or is it really not getting any
> data to relay.
> --
> 
> # p.d.
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