VLANs, or Virtual LANs, are really the first sign of virtualization that came to networking. Before VLANs we ended up having a whole switch as just one broadcast domain. So that meant that we had routers everywhere to split up …
From a very practical perspective, the layer 2 discovery protocols have been invaluable to me as a network engineer. There are a lot of times when you will come into a situation, depending upon what kind of position that you …
Now that we understand how different VLANs on one switch segregate broadcast domains, we need to be able to allow that VLAN to traverse multiple switches, such that VLAN 50 on my current switch can talk to VLAN 50 on …