The Routing Logic
Routers look at the packet’s destination address to determine where the packet is going so they can select the best path to get the packet there. In order to calculate the best path, routers must know which interface should be used to reach the packet’s destination network. Routers learn about networks either by being physically connected to them or by learning information from other routers or from a network administrator. The process of learning about networks from other routers’ advertisements is called dynamic routing and different routing protocols can be used to achieve this. The . . .
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