Does the Wi-Fi network transmit NMEA 2000 data?

No, the WiFi network only transmits AIS and GPS data. The NMEA 2000 interface is only to output AIS and GPS data to the NMEA 2000 network.

However, the AIT5000 WiFi network also transmits NMEA 0183 data so you can connect your equipment to the NMEA 0183 input and the AIT5000 will also transmit your other equipment data. If your equipment has an NMEA 2000 interface then you should add the iKonvert, NMEA0183/2000 converter, to transmit over WiFi all your NMEA 2000 data.