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LG TV shown scanning LAN for third-party phones and other devices
(arstechnica.com)
This is a most excellent place for technology news and articles.
VLAN? Why would you let a monitor have a network connection? Grab the Mac address, and put it on a denylist so you don't accidentally give it an IP address as part of your setup procedure.
smart boards, remote power off. I generally prefer (as I mentioned in other comments) to run them from PCs or an HDMI matrix, but I've had reasons to network-connect some here and there.