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  • Porter Doran thinks this is interesting:

was the fact that each of these is abstracted from

From

Cover of Junos Security
  • Operational Mode
  • from Junos Security
  • by James Quinn, Timothy Eberhard, Patricio Giecco, Brad Woodberg, Rob Cameron
  • Publisher: O'Reilly Media, Inc.
  • Released: August 2010

Note

was to abstract each of these from its actual source