VLAN
Resources: https://www.n-able.com/blog/what-are-vlans
VRF
Resources: https://avinetworks.com/glossary/virtual-routing-and-forwarding-vrf/#:~:text=Virtual%20routing%20and%20forwarding%20(VRF)%20is%20an%20IP%2Dbased,VRIs)%20within%20the%20same%20router.
Virtual Router
Resources: https://www.sdxcentral.com/networking/nfv/mano-lso/definitions/whats-a-virtual-router-vrouter/#:~:text=A%20Virtual%20Router%2C%20or%20vRouter,used%20a%20dedicated%20hardware%20device.