Traditional network layer packet forwarding relies on the information provided by network layer （  ） protocols， or static routing， to make an independent （  ）decision at each hop within the network. The forwarding （  ）is based solely on the destination （  ）IP address. All packets for the same destination follow the same path across the network if no other equal-cost paths exist. Whenever a router has two equal-cost （  ）toward a destination， the packets toward the destination might take one or both of them， resulting in some degree of load sharing.