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On Fri, Jul 5, 2013 at 10:27 PM, Julian Hall wrote: > It could be simply that it would be more expensive for them. Say you had 2 > million customers all with static IPs, you'd have to buy a big enough block > of IPs so they could have one each. If on the other hand you knew from > servers logs etc that the most you'd ever had online at the same time was > 500,000 you could get away with a block of say 600,000 to give yourself a > bit of leeway and save on the big block expense. This would be a valid argument, if it weren't for the fact that - as bad apple has pointed out - most people are online most of the time. So out of your 2m customers, you'd have 1.8m online most of the time and with a bit of leeway, you'll end up having to buy a block of 2m addresses One advantage with dynamic IP addresses (apart from their ability to 'solve' problems) is that it makes mergers or take-overs easier: you can simply redistribute the new pool of addresses in a more efficient way. Martijn. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq