Re: follow up on gigabit either
K wrote: [useful summary of gigabit ether situation]
Steve also made exclnt point that the ATM vs 'promiscuous' medium have other inherent distinction of potential interest to ISPs with policy/privacy/security concerns
I'm not quite sure I understand this bit; isn't switched ether (of any speed) equally secure as an ATM switch would be? -george william herbert gherbert@crl.com I speak only for myself
On Wed, Dec 23, 1998 at 08:00:29PM -0800, George Herbert wrote:
K wrote: [useful summary of gigabit ether situation]
Steve also made exclnt point that the ATM vs 'promiscuous' medium have other inherent distinction of potential interest to ISPs with policy/privacy/security concerns
I'm not quite sure I understand this bit; isn't switched ether (of any speed) equally secure as an ATM switch would be?
One aspect of this has more to do with on by default vs off by default nature of traffic in the mesh. In an multiaccess broadcast medium, port A can send traffic to port B. In a (virtual)circuit switched environment, this can't be done w/o setting up explicit connections between the two parties. Given the occasional creative uses of multiaccess broadcast media exchange points, this can be seen as a major operational win, although some ATM exchange operators set up full mesh of PVCs by default, negating this advantage. Port filtering on multiaccess broadcast media can provide this feature if the switches can do this w/o melting. -dorian
It's kinda hard to flood the ARP table of an ATM switch and have it let you see the traffic on another PVC. It can be done with a switch. (Not necessarily _all_ switches but, some.) At 08:00 PM 12/23/98 -0800, you wrote:
K wrote: [useful summary of gigabit ether situation]
Steve also made exclnt point that the ATM vs 'promiscuous' medium have other inherent distinction of potential interest to ISPs with policy/privacy/security concerns
I'm not quite sure I understand this bit; isn't switched ether (of any speed) equally secure as an ATM switch would be?
-george william herbert gherbert@crl.com I speak only for myself
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participants (3)
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Dorian Kim -
George Herbert -
John Fraizer