 In a network where each destination is uniquely numbered, interval routing associates non-overlapping, contiguous ranges of destinations with each output link.An output link for a packet is chosen by comparing the destination (contained in the packet's header) to each interval and choosing the one that contains the destination.The benefits of interval routing are that it is sufficient to provide deterministic routing on a range of network topologies and that can be implemented simply with a table-based lookup, so it delivers routing decisions with low latency.