ROBUST LOOP-FREE ON-DEMAND ROUTING IN AD HOC NETWORKS 1 Introduction 1 1.1 Destination Sequence numbers . . . . . . . . . . . 3 1.2 Topology Information . . . . . . . . . . . . . . . . 6 1.2.1 Paths as labels . . . .. . . . . . . . . 9 1.2.2 Paths with untrusted topology information . . . . . . .