3.3 Dynamic Nonhierarchical Routing

Commonly known as DNHR. It is a naive protocol, accepts call if a one-loop path is available, else drop. DNHR divides day into around 10-periods. In each period, each toll switch is assigned a primary one-hop path and a list of alternatives. It can overflow to alternate if needed and also drop call if all alternate paths are busy.

Problems associated with DNHR are:

	Does not work well if actual traffic differs from prediction.
	There are some simple extensions to DNHR.