"Gaz" <gazter@msn.com> writes:
[color=blue]
> SPI is to do with internet packet inspection, is it not???[/color]

Google would seem to indicate otherwise. The first hit on the query
'SPI' returns the Wikipedia article for 'Serial Peripheral Interface'
(an inter-chip bus), which is also what SPI means to me. None of the
hits returned on the first 5 pages use SPI in the context of packet
inspection - which implies that that is a minority usage.