TP/IX

from The Free On-line Dictionary of Computing (8 July 2008)
TP/IX

   <networking, protocol> An {Internet} {protocol}, described in
   {RFC 1475}, which changes {TCP} and {UDP} headers to give a
   64-bit {IP address}, a 32-bit {port} number, and a 64 bit
   sequence number.

   (1995-04-03)
    

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