H31-341_V2.5 · Question #65
Which of the following paths have nothing to do with business?
The correct answer is B. OSC. OSC (Optical Supervisory Channel) is the path that carries management and control information - things like amplifier status, wavelength monitoring, and alarm signals - rather than actual business/client traffic. It operates on a dedicated wavelength outside the main signal…
Question
Which of the following paths have nothing to do with business?
Options
- AOCh
- BOSC
- CClient
- DODUk
How the community answered
(40 responses)- A10% (4)
- B70% (28)
- C5% (2)
- D15% (6)
Explanation
OSC (Optical Supervisory Channel) is the path that carries management and control information - things like amplifier status, wavelength monitoring, and alarm signals - rather than actual business/client traffic. It operates on a dedicated wavelength outside the main signal band specifically to support network operations.
OCh (Optical Channel) is wrong as a distractor: it is the fundamental business path in OTN, carrying end-to-end client signals across the optical layer. Client is wrong because it literally represents the business service (e.g., Ethernet, SDH) being handed to the network for transport. ODUk (Optical Data Unit) is wrong because it is the OTN electrical-layer container that packages and multiplexes client signals for transport - squarely in the business data plane.
Memory tip: Think "S = Supervision, not Service" - OSC supervises the network infrastructure; all the other options (OCh, Client, ODUk) are directly involved in delivering the customer's service data.
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