Which technology can different network layers use to communicate with one another while maintaining organizational segmentation?

Question

Options

• AWSON
• BMPLS-TP
• CGMPLS-UNI
• Dsegment routing

• A
  4% (1)
• B
  13% (3)
• C
  79% (19)
• D
  4% (1)

Explanation

GMPLS-UNI (Generalized MPLS User-Network Interface) is correct because the UNI specifically defines a standardized signaling interface between different administrative domains or network layers - such as an IP/MPLS layer requesting services from an optical transport layer - while keeping each domain's internal topology and resources hidden from the other. This is precisely the mechanism for inter-layer communication with organizational segmentation.

Why the distractors are wrong:

• A. WSON (Wavelength Switched Optical Network) addresses routing and wavelength assignment in optical networks, not cross-layer inter-domain communication.
• B. MPLS-TP (MPLS Transport Profile) is a transport-oriented MPLS variant focused on deterministic forwarding and OAM, not inter-layer organizational boundaries.
• D. Segment Routing is a source-routing paradigm that encodes paths using segment lists; while it scales well across domains, it doesn't define an organizational boundary interface the way UNI does.

Memory tip: Think of "UNI" as the bouncer at the club door - it controls what information crosses from one organization's network into another, letting them talk without revealing internal secrets. If the question mentions inter-layer communication with segmentation, look for UNI.

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