True. I was assuming a moderately ethical ISP - someone that
oversubscribed is selling the idea of net access rather than net access
itself.
>> Something that's been unmentioned here is that PPP takes an extra five
>> percent bandwidth away from you for it to be able to support multiple
>> protocols. SLIP only does IP. That 5% should be enough for modem users to
>> demand SLIP in bandwidth-intensive situations such as CU-SeeMe.
>
>I'd like to see how you come to those calculations. The PPP difference
>should be something like 5 bytes per packet more than SLIP, which works
>out to little more than .5% on a 1000 byte mtu or 1.9% on a 256 byte mtu.
I didn't do the math, it came directly from the people who wrote MacTCP and
the team that is doing Open Transport. I believe it's more than just the
packet size, but the CPU load of checking each packet to see what protocol
it is.
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Michael Sattler <msattler@jungle.com> http://www.jungle.com/msattler/ |
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