[VPM] Types of LAN's for compatibility

[Jeremy Aiyadurai]

hi Darren,


>Since you're on a LAN, there are usually only 254 possible IP addresses (at 
>least with a normal LAN),
what makes a LAN, a normal LAN?
how many types a LAN's are there, and what would be the ip ranges?
eg. my lan is 192.168.1.* (eg. * = 1 - 254).

The reason i am asking these questions is I dont know too much about lan 
computing, but need
to know, so my client/server app, will be able to work on any type of lan.

Thanks in advance,

Jeremy A.


>From: Darren Duncan <darren at darrenduncan.net>
>To: victoria-pm at pm.org
>Subject: Resend - Re: [VPM] network discovery
>Date: Wed, 9 Jun 2004 12:17:11 -0700
>
>At 12:05 AM -0700 6/9/04, Jeremy Aiyadurai wrote:
>>hi all,
>>how do i discover all hosts (ip's and hostnames) on a lan, using perl.
>>my reason is that i am working on a client/server app. my ip's change from 
>>time to time on my network, depending on when and which machines are 
>>shutdown/restarted, and it is hard for me to find any pattern, if there is 
>>such a thing.
>>thanks in advance for any help.
>>Jeremy A.
>
>You could try pinging all the possible addresses every now and then; those 
>which reply exist.  Since you're on a LAN, there are usually only 254 
>possible IP addresses (at least with a normal LAN), which would take a few 
>seconds in total to test.  The address ranges are, as I recall, 192.168.0.1 
>thru 192.168.1.254.  (The .0 and .255 are never used by machines; they are 
>reserved for broadcast or similar things; for that matter, .1 may be used 
>by the router itself, leaving 253 others to test.) -- Darren Duncan
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