There is a plethora of serial communication devices (using [[RS232]], USB, SPI, Modem, Teletext, [[Virtual Net 96]], etc...) on Amstrad CPC, but none are supported in emulators.
Higher-level Modern Ethernet or TCP/IP network devices are much less common:
*[[M4 Board]] Wifi or compatible ([[Symbiface 3]]) is supported by CPCemu
*[[CPC-ENet]] is not supported