Very likely! But it could scan the subnet, like say a printer driver does. Multicast is the easiest, but not the only way. The issue mentioned in the article is likely related to both mDNS blocking and client isolation (peer to peer).
I have no idea of the peer discovery mechanism in this product -- I was just stating that multicast is not the only peer discovery mechanism, ala printers and other consumer kit that scans the subnet.
