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The distance vector can be used to compute the shortest path or the best route to a destination in a network. It is a key concept in routing protocols, such as RIP (Routing Information Protocol), where each router maintains a table (vector) of the best-known distances (costs) to each destination in the network.
Answer: c
Explanation: The distance vector is the distance between two points on space, thus the
unit normal vector is computed using the distance vector.