MPLS (Multiprotocol Label Switching) is an operated network technology that carries your traffic over a private network, with contractually guaranteed quality of service (QoS) and availability commitments (SLA), independent of the internet.
MPLS guarantees end-to-end quality (ideal for the critical core) but costs more and scales more slowly; SD-WAN brings agility and cost on access. Many combine both.
No: traffic runs on the carrier's private network, which is why quality is guaranteed and isolated, unlike an internet VPN.
No, but its use is refocusing: the critical core often stays on MPLS while SD-WAN handles agile access. The mix is sized to your priorities.
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