I migrate from Ubuntu Server 14 to Ubuntu Server 16 I now I have problems because I'm not undertand that.
I hope that somebody can answer me.
01 Answer
These interface names are a new standard aimed at providing consistent (and persistent) names of network devices between different boots and Linux installs. There's a good amount of information and rationale here:
There's also the technical detail of the naming scheme here:
In short, for your case, the enpXsY signifies that it's a pci device (from the p), on pci bus X, in slot Y.