Definitions for "NNI"
Keywords:  uni, atm, relay, interface, wan
Network Node Interface - Sometimes known as Network-to-Network Interface.
See Network-Network Interface.
The interface between two public network pieces of equipment.
Nearest Neighbor Interchange. This is a heuristic algorithm for searching through treespace. It proceeds by juxtaposing the positions of neighbors on a phylogenetic tree. If the resulting tree is better, then it is retained. This algorithm is quite a gentle perturbation of the tree and is inferior to either SPR or TBR in terms of completeness of the searsh. On average it will be quicker than SPR or TBR.
see Nearest Neighbor Interchange.