Can use the wireless extender as a print server for ethernet (hardwire) laser printers and large format plotters wired to extender?

I would expect so, if those devices have an Ethernet connection. This extender has a single Ethernet connector (RJ45), and to hook two devices to it, you would need a switch/hub. And each of the devices would need to come up with their own IP addresses (either static or dynamic). DHCP seems to work just fine on this port.

Questions & Answers: Asus AC1200 Dual-Band Wi-Fi Range Extender

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Asus AC1200 Dual-Band WiFi Range Extender Wireless Signal Booster Up to 1167Mbps Repeater | Access Point | Media Bridge | Support Aimesh (RP-AC55), White

WiFi Range Extender boost your existing 802. 11AC Dual-Band Wi-Fi network with speeds up to 1167 Mbps
Two external antennas enhance Wi-Fi signal coverage for whole home coverage
Quick and secure setup with just a press of the WPS button
Smart LED signal Indicators help you find the best location for optimum Wi-Fi performance
Small form Factor for easy placement anywhere in your home. OS Support-Windows 10, Windows 8.1, Windows 8, Windows 7, Mac OS X 10.7, Mac OS X 10.8, Mac OS X 9, Mac OS X 10, Mac OS X 11, Mac OS X 12 or higher

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