root@bammelecke:~# ethtool enp65s0f0
Settings for enp65s0f0:
        Supported ports: [ TP ]
        Supported link modes:   100baseT/Full
                                1000baseT/Full
                                10000baseT/Full
                                2500baseT/Full
                                5000baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  100baseT/Full
                                1000baseT/Full
                                10000baseT/Full
                                2500baseT/Full
                                5000baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 100Mb/s
        Duplex: Full
        Auto-negotiation: on
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        MDI-X: Unknown
        Supports Wake-on: g
        Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

root@bammelecke:~# nmcli
enp65s0f0: unmanaged
        "Intel X710"
        ethernet (i40e), FC:34:97:B0:96:01, hw, port fc3497b09601, mtu 1500
enp65s0f1: unmanaged
        "Intel X710"
        ethernet (i40e), FC:34:97:B0:96:02, hw, port fc3497b09602, mtu 1500
enx629dc7f24ca7: unmanaged
        "American Megatrends Virtual Ethernet."
        ethernet (cdc_ether), 62:9D:C7:F2:4C:A7, hw, mtu 1500
lo: unmanaged
        "lo"
        loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536
Use "nmcli device show" to get complete information about known devices and
"nmcli connection show" to get an overview on active connection profiles.

Consult nmcli(1) and nmcli-examples(7) manual pages for complete usage details.