Action at a distance-demanding applications

We have many applications which are difficult to accommodate on the current WANs, though they operate reasonably over LANs. These demanding applications include, unicast, multicast and near-broadcast services. Normally these applications can be made to operate in a small scale over MANs and WANs; larger scale deployment requires resolution of a number of technical and managerial problems which we are starting to understand-but have not yet resolved. Where we have had access to the relevant facilities, we have shown that these demanding applications operate well on an international scale