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Multiple Choice

Which technology is cited as supporting T1/E1, ATM, Frame Relay, and DSL in telecommunications networks?

MPLS, or Multiprotocol Label Switching, is a forwarding technique that attaches a short label to packets and uses that label to switch them along a precomputed path through the network. This label-based approach sits between traditional Layer 2 switching and Layer 3 routing, allowing traffic to be carried over a variety of underlying transport technologies—including T1/E1, ATM, Frame Relay, and DSL—without needing separate forwarding mechanisms for each. Because the path is determined by labels, MPLS enables traffic engineering, predictable performance, and quality of service, making it the flexible backbone that ties these diverse technologies together. The other options are not network transport technologies: MPEG and MP3 are compression standards for video and audio, and Megapixel refers to image resolution, so they don’t apply to how networks support those physical-layer technologies.

MPLS, or Multiprotocol Label Switching, is a forwarding technique that attaches a short label to packets and uses that label to switch them along a precomputed path through the network. This label-based approach sits between traditional Layer 2 switching and Layer 3 routing, allowing traffic to be carried over a variety of underlying transport technologies—including T1/E1, ATM, Frame Relay, and DSL—without needing separate forwarding mechanisms for each. Because the path is determined by labels, MPLS enables traffic engineering, predictable performance, and quality of service, making it the flexible backbone that ties these diverse technologies together. The other options are not network transport technologies: MPEG and MP3 are compression standards for video and audio, and Megapixel refers to image resolution, so they don’t apply to how networks support those physical-layer technologies.