Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!uakari.primate.wisc.edu!xanth!mcnc!rti!xyzzy!dg-rtp!meissner From: meissner@twohot.rtp.dg.com (Michael Meissner) Newsgroups: comp.protocols.tcp-ip Subject: Re: Counting Internet Hosts (and Users) Message-ID: Date: 16 Oct 89 16:30:38 GMT References: <20444@usc.edu> <8910101451.AA01170@interlan.interlan.com> <5346@shlump.nac.dec.com> Sender: usenet@xyzzy.UUCP Organization: Data General (Languages @ Research Triangle Park, NC.) Lines: 21 In-reply-to: michaud@devax.dec.com's message of 12 Oct 89 01:50:38 GMT In article <5346@shlump.nac.dec.com> michaud@devax.dec.com (Jeff Michaud) writes: | > 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? Note that doing this may have two adverse affects. It may cause trouble with the beancounters, for sites that pay for their links to the internet (can you say X.25?) if a large increase in the traffic occurs because of 64K pings to a class B network. Also, it will undercount some networks, which have cisco boxes (or other such gear) which are set up not do not allow inward connections except for certain hosts and/or ports. -- Michael Meissner, Data General. If compiles where much Uucp: ...!mcnc!rti!xyzzy!meissner faster, when would we Internet: meissner@dg-rtp.DG.COM have time for netnews?