원문 - 영어 - Almost every busy network backbone has some...

Almost every busy network backbone has some congested links while others remain underutilized.
That's because shortest-path routing protocols send traffic down the path that is shortest without
considering other network parameters, such as utilization and traffic demands. Using Traffic
Engineering (TE), network operators can redistribute packet flows to attain more uniform distribution
across all links. Forcing traffic onto specific pathways allows you to get the most out of your existing
network capacity while making it easier to deliver consistent service levels to customers at the same
time