[ih] Fwd: History of "accounts"
mfidelman at meetinghouse.net
Wed Feb 12 15:55:08 PST 2014
Jack Haverty wrote:
> There was an interesting algorithm we put in the US-side VAN gateway
> which wasn't discussed much and might have therefore escaped being
> captured by History. Until now. Here it is, for posterity:
> "When a packet arrives to be sent to the X.25 network, if the X.25
> connection is open, queue the packet for sending. If the X.25
> connection is *not* open, open the connection, send that single
> packet, and immediately close the connection."
> So, the SYN packet of a TCP connection heading to EU from a US
> computer would get sent and the US would pay for a short, one-packet,
> X.25 session. The ACK returning from the EU computer would then open
> a connection from the EU side, and, lacking a similar algorithm,
> subsequent packets for that TCP session, and any others that might
> subsequently occur (FTP transfers for example) would get billed to the UK.
> So, most usage of that X.25 path got billed to the UK sponsors. I
> don't know if the UK ever noticed that this was happening. Peter
> Kirstein might remember. For the curious, the history of the VAN
> gateway is discussed in a series of BBN Quarterly Technical Reports of
> that era, many of which are available online.
> Someone told me once - "Management is the art of putting your expenses
> into someone else's budget".... which we did, as part of our role in
> managing the "core gateways".
Better watch out Jack - someone might come after you for back charges.
In theory, there is no difference between theory and practice.
In practice, there is. .... Yogi Berra
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