The link weights are preferably adjusted to reduce the cost of {TAIL ~ network operation} without increasing {HEAD ~ the imbalance} in link utilizations 
The link weights are preferably adjusted to reduce the cost of { TAIL ~ network operation } without increasing { HEAD ~ the imbalance } in link utilizations
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH