Which Ethernet PHY is used for the Nitrogen 8M Plus SMARC?

The Nitrogen 8M Plus SMARC has two KSZ9031RNX Gigabit Ethernet transceivers available for high-speed data transfers.  The KSZ9031RNX provides the Reduced Gigabit Media Independent Interface (RGMII) for direct connection to RGMII MACs in Gigabit Ethernet processors and switches for data transfer at 10/100/1000 Mbps.