A way to do networking would be to implement a tunneling protocol in
simh_ether and hand packets off to a proxy that put them on the wire.
Cisco GRE might be a suitable protocol for Ethernet over IP.
If all you care about is IP, then the protocol could be OpenVPN, and
other protocols could be detected by "ether type", SAP or SNAP and
handed off to other encapulation protocols.
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