I$\text{'}$m working on a paper that lays out a real$-$use case for a VLAN. It's based around a company that needs three separate broadcast domains: guest WiFi VLAN, sales VLAN, and warehouse VLAN. An SSID is necessary for the guest WiFi VLAN, but my understanding is that an SSID isn't necessary for the other two VLANs. Is this correct? If so$,$ can you explain why? I can't find anything on any network that explains why; at least not one that I can understand.