Multiprotocol Label Switching (MPLS) - (Associated with MPLS VPN, layer 2 MPLS VPN, Multipoint Layer 2 VPN for Ethernet, Multipoint IP-VPN, Virtual Private Networks, VPNs, Circuit-switched Network over a Packet-switched Network, IP packets, ATM, SONET, Ethernet frames.) https://en.wikipedia.org/wiki/MPLS-VPN