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