An IPX internal network number is a logical network number that identifies an individual NetWare server. Each server should have a unique internal network number.
The IPX network number that you bind to your network card would be the same for each server that you want to be able to communicate with on your network. If they have different network numbers they will require a router that exists on both networks to be able to communicate.
The full network address for each device on an IPX network is the network number + the hardware address. It would look something like FADE1234:00E02928F93A
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