Routing basics

As I have mentioned, routing is the act of sending source packets to a different destination; they could go across a WAN or a different VLAN, but some sort of routing must take place, by using a router. If you do not have multiple VLANs or must go across the internet to reach a branch office, well, then there is no routing needed. If that's the case, you must be on a small network or a bogged-down network.

Think about the scenario in the following screenshot:

The preceding screenshot shows a very common configuration used by schools: they have switches in their classrooms, all in the native VLAN, connected to a core switch, ...

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