These are not two separate mermaids. This is a network card with a built-in splitter. I needed one network adapter for an internal network and one for an external network blocked by a firewall.
TP-Link Archer T4U Plus AC1300 USB 3.0 WiFi Network Adapter
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Wi-Fi adapter D-link DWA-140, black
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UGREEN USB 3.0 Ethernet Adapter Hub with RJ45: Fast Gigabit Ethernet Converter, 3 Ports USB 3.0 Hub Compatible for MacBook, iMac, Surface Pro, Chromebook, Laptop, PC
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π StarTech.com NETRS232 Serial to IP Ethernet Device Server - DIN Rail Mountable - Serial Device Server - Serial Over IP Device Server (Black)
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π USR-TCP232-410s: RS232/RS485 Serial to Ethernet Adapter/IP Device Server with DHCP/DNS Support
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