Abstract: In the last several years, the IP protocol suite has dominated the networking technology as a result of expansive growth of the Internet. In addition, many new applications have emerged with the need for IP signaling, i.e. installation, maintenance and removal of control states in IP network nodes that are associated with end-to-end communications, including and beyond the traditional ones associated with quality of service and resource allocation. In addition to general needs with respect to protocol extensibility, network security and other requirements call for a new approach in IP signaling. This presentation discusses the direction taken by the IETF and some of the recent standardization efforts for a new extensible IP signaling protocol suite (NSIS). The focus is to describe the principles and the state of the art on the design and development of the NSIS protocol suite, and compare them with RSVP, the current Internet QoS signaling protocol. This presentation will also give an overview of the NSIS protocol implermentation status at the University of Twente. This is accomplished within the context of two M.Sc. assignments that are being conducted at the DACS group of the University of Twente. These M.Sc assignments are: M.Sc. assignment conducted by Martijn Swanink: RMD (Resource Management in Diffserv) within NSIS (Next Steps in Signaling): Protocol implementation. M.Sc. assignment conducted by Mayi Zoumaro: NTLP: Protocol implementation