v v +-----+-----+ +-----+-----+ NSIS NSIS Initiator Responder +-----------+ +-----------+
Figure 1: Communication patterns in NSIS
First-Peer/Last-Peer Communication:
The end-to-end communication scenario depicted in Figure 1 includes the communication between the end hosts and their nearest NSIS hops. "First-peer communications" refers to the peer-to-peer interaction between a signaling message originator, the NSIS