Nikon Z 9 Reference Manual page 364

D
Caution: Ethernet Networks
Do not disconnect the Ethernet cable during upload or while the camera is
on.
D
Caution: Wireless Networks
Response may slow on wireless networks.
D
Firewall Settings
TCP port 15740 and UDP port 5353 are used for connections to computers.
File transfer may be blocked if the server firewall is not configured to allow
access to these ports.
A
Connection Status
Connection status is shown by the camera
network indicator.
Network indicator
I (off)
K (green)
H (flashes green)
H (flashes amber)
Computers: Connecting via Ethernet or Wireless LAN
364
No connection.
Waiting to connect.
Connected.
Error.
Status