https://oemdrivers.com/network-syskonnect-sk-9s92-1000base-lx-dual-port-server-adapter
SysKonnect SK-9S92 1000Base-LX Dual Port Server Adapter Driver | Device Drivers
The SysKonnect SK-9S92 1000Base-LX Dual Port Server Adapter Driver are below. These Drivers are compatible with numerous devices using Marvell chips.
dual port
https://manpages.ubuntu.com/manpages/resolute/man4/if_sk.4freebsd.html
Ubuntu Manpage: sk - SysKonnect SK-984x and SK-982x PCI Gigabit Ethernet adapter driver
SysKonnect SK-984x and SK-982x PCI Gigabit Ethernet adapter driver