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From: michaud@devax.dec.com (Jeff Michaud)
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  Counting Internet Hosts (and Users)
Message-ID: <5346@shlump.nac.dec.com>
Date: 12 Oct 89 01:50:38 GMT
References: <20444@usc.edu> <8910101451.AA01170@interlan.interlan.com>
Sender: news@shlump.nac.dec.com
Organization: DEC
Lines: 21

> In article <8910101451.AA01170@interlan.interlan.com>
>     Seems like there is a simpler way to do it......
>     
>         for (i=0; i<0xffffffff; i++)
>              foo = ping(i)
>             if (foo == answered)
>                number_of_hosts++;

> Yes, but it probably takes about 136 YEARS to run (assuming that pings
> take about 1 second to either respond or time out).

	Thats only if you were to actually wait for for a response/timeout.  If
	you just continuously sent one right after the other without waiting for
	the response (but sending just slow enough as to not create a traffic jam)
	and simply count the number of responses.  I wonder how long that would
	take?

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|Jeff Michaud    michaud@decwrl.dec.com  michaud@decvax.dec.com|
|DECnet-ULTRIX   #include <standard/disclaimer.h>              |
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