{TAIL ~ The steps} of the method include adding new links to the network topology model to protect against single node failures, and adjusting {HEAD ~ link weights} for the network topology model to reduce at least one of a cost of network operation and an imbalance in link utilizations 
{ TAIL ~ The steps } of the method include adding new links to the network topology model to protect against single node failures , and adjusting { HEAD ~ link weights } for the network topology model to reduce at least one of a cost of network operation and an imbalance in link utilizations
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