Telecom and Networking Test 1 Practice

The point being tested is how transport models and typical use cases differ for MPLS, VPN, and SD-WAN. MPLS operates inside a provider’s private backbone using labeled paths to steer traffic with QoS and predictable performance, which is why it’s a common choice for site-to-site enterprise WANs that require reliable, controlled performance. VPN creates secure, encrypted tunnels over public networks (usually the Internet), enabling remote access or secure site-to-site links without relying on private transport. SD-WAN uses software-defined control to manage traffic across multiple transports—MPLS, broadband Internet, LTE/5G—based on policies and application needs, delivering flexible, cost-effective, and resilient WAN connectivity with centralized management. The different descriptions reflect how each technology handles transport and use cases: MPLS for private, performance-guaranteed paths; VPN for encrypted use over public networks; SD-WAN for multi-transport, policy-driven optimization.