The HP Z420 uses an Ethernet port, typically a standard 10/100 Mbps LAN port.
The HP Z420 uses an Ethernet port, typically a standard 10/100 Mbps LAN port.
Choose an Ethernet cable compatible with the HP Z420, preferably a standard Cat5e or Cat6 cable for reliable performance.
It's also noted that Cat6 should function, though it probably won't offer any advantages compared to Cat5e. If you already possess Cat6, there are no issues in using it.