Does Surface Pro 6 have an Ethernet (Wired Network) port?

No, the Surface Pro 6 does not include a built-in Ethernet (RJ-45) port. To add wired networking simply connect a USB-A adapter, hub or docking station with an Ethernet jack into its full-size USB 3.0 port. That port supports data rates up to 5 Gbps, so you can use any gigabit Ethernet adapter without bandwidth issues.

An Ethernet port (RJ-45 jack) provides a wired network connection with higher stability, bandwidth and lower latency than Wi-Fi, ideal for large file transfers, VoIP calls and gaming.