What is UPT stand for?

Nothing comes to mind. Perhaps you mistyped it? "UTP" stands for "Unshielded Twisted Pair", which is the kind of cable used for Ethernet cables and telephone wiring. "UDP" stands for "User Datagram Protocol", which is a part of TCP/IP. UDP packets are useful for short, quick transmissions where it's not a big deal if the transmission is lost or garbled. Examples are voice over IP (VoIP) and Domain Name Service queries (DNS). (The other choice for sending data in TCP/IP is called "Transmission Control Protocol", or TCP. It's much more complicated than UDP. TCP tries to ensure that all the data is delivered in the correct order, and retransmits lost data. TCP is slower than UDP.) "UPnP" is "Universal Plug 'n Play", which is a Microsoft invention that allows your computer to automatically configure network services such as printing and router forwarding. That's all I've got at the moment. HTH, Gdunge