Chapter 3. Trunking and Bandwidth Aggregation
So far you have learned how to essentially configure a switch as a single independent device. However, such a configuration is not a very valid representation of the real world, because the size of many networks dictates that more than one switch is required to service the connectivity needs of the network. You've also learned about virtual LANs (VLANs) and how each switch can service multiple logical LANs simultaneously, maintaining separation between each VLAN.
Trunking refers to the interconnection of switches to allow devices attached to a particular switch to communicate with devices attached to another switch. Trunking allows switches to transmit traffic from multiple VLANs configured locally ...
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