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Delivering Packets
Many internetworks often include redundant data paths that you can use to route messages. Typically, a packet will pass from the local LAN segment of the source PC through a series of routers to the local LAN segment of the destination PC. (You learn more about routers in Chapter 6.) The OSI Network layer oversees the process of determining paths and delivering packets across the internetwork. Chapter 6 describes some of the routing algorithms used to determine a path. The following sections introduce some of the basic switching techniques, as follows:

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