Consider the following simple analogy used ot describe how the Internet works: "Imagine a complex hichway system on which millions of cars are alvays moving. There are groups of cars that belong to the same travelparty heading to the same place. Before getting into the highway, each individual driver consults a map and marks an itinerary from origin tofinal destination. Each driver is doing this independently. Therefore, it is possible that different cars belonging to the same travel party mayfollowdifferentitineraries. Eventually, however, ac a r arrives at its destination. It waitsfor other members ofthesame travel party to arrive, andthen they all do something useful together." Compared with the way the Internet actually works, the above analogy contains an important inaccuracy. Can you clearl explain what ti is$?$