350-501 · Question #199
What is the function of the FEC filed within the OTN signal structure?
The correct answer is C. It allows receivers to correct errors upon data arrival. The FEC field within the OTN signal structure contains redundant information that enables receiving devices to detect and correct transmission errors in the data upon arrival.
Question
What is the function of the FEC filed within the OTN signal structure?
Options
- AIt allows the sending devices to apply QoS within the OTN forwarding structure.
- BIt allows source nodes to discard payload errors before transmitting data on the network.
- CIt allows receivers to correct errors upon data arrival.
- DIt allows deep inspection of data payload fields.
How the community answered
(29 responses)- A7% (2)
- B3% (1)
- C86% (25)
- D3% (1)
Why each option
The FEC field within the OTN signal structure contains redundant information that enables receiving devices to detect and correct transmission errors in the data upon arrival.
The FEC field's function is error correction, not to apply Quality of Service (QoS) mechanisms like prioritization or bandwidth allocation within the OTN.
FEC is primarily designed for error correction at the receiver during or after transmission, not for source nodes to discard errors before transmitting data.
The FEC (Forward Error Correction) field carries redundant coding information that allows the OTN receiver to detect and correct bit errors that may have occurred during transmission, without requiring retransmission of the data. This improves signal quality and reliability over long distances.
Deep inspection of data payload fields (Deep Packet Inspection) is a function for analyzing content, typically at higher network layers, and is unrelated to the low-level error correction provided by FEC.
Concept tested: OTN FEC (Forward Error Correction) function
Source: https://www.itu.int/ITU-T/recommendations/rec.aspx?id=12301
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