I understand what a VLAN is and what purpose it serves. However, I'm having a difficult time understanding where VLANs orginate.
Specifically, I know CISCO firewalls, switches, and routers all deal with VLANs: switches are configured with ports on certain VLANs, routers direct traffic between VLANs, and firewall block/allow traffic between VLANs.
But since I'm not an IT professional, where do the VLANs get managed/originated? Say I have VLAN 330 that has addresses between 192.168.1.0/24 and VLAN 331 that has addresses between 192.168.2.0/24. Where is this IP address range determined?