Description:
1. Serial Tunneling (STUN)
2. Simple traversal of UDP over NATs (STUN)
Complete Definition:
1. Serial Tunneling (STUN) is the tunneling of SDLC frames across a WAN. In the traditional systems network architecture (SNA) world, remote controllers are attached to the front-end processor (FEP) through a set of modems attached over POTS (Plain Old Telephone Service) or leased lines.
2. Simple Traversal of UDP over NATs (STUN). Simple Traversal of UDP through NATs (STUN), is a network protocol allowing a client behind a NAT (Network Address Translator) to find out its public address, the type of NAT it is behind and the internet-side port associated by the NAT with a particular local port. This information is used to set up UDP (User Datagram Protocol) communication between two hosts that are both behind NAT routers. The protocol is defined in RFC 3489 .
Wikipedia Definition for Simple traversal of UDP over NATs (STUN)
