A rendezvous protocol is a computer network protocol that enables resources or P2P network peers to find each other. A rendezvous protocol uses a handshaking model, unlike an eager protocol which directly copies the data. In a rendezvous protocol the data is sent when the destination says it is ready, but in an eager protocol the data is sent assuming the destination can store the data.[1]
Because of firewallnetwork address translation (NAT) issues, rendezvous protocols generally require that there be at least one unblocked and un-NATed server that lets the peers locate each other and initiate concurrent packets at each other.