Ethernet / LAN - Dell 5420 Rugged
The Dell Latitude 5420 Rugged has a built-in Gigabit Ethernet (RJ-45) port on the back, using the Intel i219-LM controller with PXE boot, Wake-on-LAN and jumbo frame support.
A second Gigabit Ethernet port is available through the configurable rear I/O bay. See Integrated Interfaces - Dell 5420 Rugged.