The MacBook Pro (Late 2016) Replaces Thunderbolt based Ethernet Adapter with the Belkin USB-C to Gigabit Ethernet Adapter
Like the earlier versions of the MacBook Pro, the MacBook Pro (Late 2016) also removes the bulk Ethernet port.
Previously, Apple had their own Thunderbolt Gigabit Ethernet Adapter (MD463LLA) but with Thunderbolt 3 now being carried over USB Type-C, Apple can now use a variety of third party USB Type-C to Ethernet adapters.
The apparent heir designate of the Thunderbolt Gigabit Ethernet Adapter (MD463LLA) is the Belkin USB-C to Ethernet Adapter looks a lot like Apple's previous Thunderbolt based Ethernet adapter.
If looks aren't that important, Belkin also sells the USB-IF Certified USB Type C (USB-C) to Gigabit Ethernet Adapter which is a lot cheaper (click here for pricing on Amazon).