单选题 Traditional network layer packet forwarding relies on the information provided by network layer ______ protocols, or static routing, to make an independent ______ decisions 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.