Passing Traffic Between VLANs

At the beginning of this chapter, a VLAN was defined as a broadcast domain. To take that concept a bit further, the same devices that comprise a VLAN are also in the same TCP/IP subnet. So, devices in the same VLAN are in the same subnet, and devices in different VLANs must be in different IP subnets. Although the concept of a VLAN and a subnet are indeed different concepts, they have a one-to-one relationship.

This section covers some of the terminology regarding possibilities for passing packets between devices in different VLANs.

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