Introduced today and already available to order from QNAP's partners worldwide, the QSW-1105-5T is the company's first 2.5 GbE network switch. Its highlights include five 2.5 GbE NBASE-T RJ45 ports, plug-and-play setup, auto-negotiation, as well as automatic loop detection and blocking.
https://www.notebookcheck.net/QNAP-launches-its-first-2-5-GbE-network-switch-namely-the-QSW-1105-5T.481578.0.html