Multiprotocol Label Switching (MPLS) is growing in popularity as a technological replacement for traditional WAN deployments. MPLS provides a fully Layer 3 environment and the ability to fully mesh sites across WAN connections. This is an immense advance in terms of latency reduction and topological resilience. MPLS extends the reach of the enterprise network across the provider network. This includes routing information as well as quality of service (QoS) protection of critical network traffic types and the possibility of numerous "in the cloud" services offered by service providers such as VPN remote access, firewall, and content-filtering services.
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