"Are you P4 compliant ?". In France in the 1990's it was a pure French private joke before the military service was officially abolished. At that time being "classé P4" meant that you were mentally unable to join the French military army. Even if you wanted to. Therefore, at the age of 18, some daring people faked mental illness in order to avoid the "Service militaire" (1 year duration). Of course here, P4 is about the data plane behavioral model programming language from P4Lang project.

Overview

For those who are not familiar with data plane programming and especially with P4, "P4 is a domain-specific programming language for specifying the behaviour of the dataplanes of network-forwarding elements." (from p4.org) in short it helps you to write a "program specifying how a switch processes packets".

...