Sure, that's a lot of variation. Sure, some of these features are essential for certain applications, like checksum offload etc. However, most of these featur

Sure, that's a lot of variation. Sure, some of these features are essential for certain applications, like checksum offload etc. However, most of these features are still uniform enough that a whole bunch of them are supported by standard drivers included with all BSD operating systems, and configurable with the standard ifconfig of each BSD, too: http://mdoc.su/-/ifconfig.8 http://mdoc.su/-/ifconfig.8 The fact that you even have a whole table with these features shows that these features are not that difficult to categorise and unbrand to be general enough to have OS-defined behaviours and configurations for.