Pass the Huawei HCIP Transmission H31-341_V2.5 Questions and answers with CertsForce

The statement that the value of FAS (Frame Alignment Signal) changes dynamically with different signals is false. The FAS is a fixed sequence placed at the start of the OTN frame structure to enable frame synchronization. It does not change dynamically, as its fixed pattern is crucial for reliable frame alignment and error detection. OTUk_LOF (Loss of Frame) alarms are generated when FAS framing fails, indicating synchronization loss. HCIP-Transmission stresses the fixed nature of FAS for consistent framing and alignment across the OTN network layers.

In the TCP/IP protocol stack, TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) reside at the Transport layer. This layer is responsible for providing end-to-end communication services for applications, including segmentation, flow control, and error checking. The Network layer handles routing (IP), Data Link layer manages physical addressing and error detection on links, and Application layer includes protocols like HTTP, FTP. HCIP-Transmission covers networking fundamentals and confirms that TCP/UDP protocols operate at the Transport layer, ensuring reliable and efficient data transport.

The ODUk SNCP service defines three protection subtypes:

SNC (Subnetwork Connection)

ISNC (Inverse SNC)

SISNC (Simultaneous Inverse SNC)

In ROADM terminology, a “colored” port is tied to a specific wavelength and cannot be tuned, so “colored” refers to fixed wavelength.

For a 100 Gbit/s signal using PAM4 modulation, each symbol carries 2 bits, effectively halving the baud rate compared to the bit rate. Additionally, using dual polarization halves the required baud rate again. Therefore, the calculation 100 ÷ 2 ÷ 2 = 25 Gbaud/s is correct.

R_LOS, R_LOF, R_OOF, and MUT_LOS all indicate loss of signal or framing, which directly interrupts service delivery.

The Multiframe Alignment Signal (MFAS) is specifically defined to provide alignment across multiple OTUk/ODUk frames when overhead bytes span those frames, so it must be used for multiframe alignment.

QPSK uses four phase states, not two. Statement B incorrectly says it assigns two possible phase values, which describes BPSK, not QPSK. QPSK effectively doubles the bits per symbol compared to BPSK, reducing baud rate while maintaining data rate, but with four distinct phases.

Ensuring the downstream OA’s input is within the specified range by first reducing upstream EVOA attenuation is the standard first step when output power falls short at minimum gain.

If adjusting the EVOA does not bring the OA’s output into spec, increasing the OA’s gain is the next appropriate action.

When the OA meets output requirements at its minimum gain setting, the preceding fiber’s incident power must be at or above the lower limit defined by the incident-power specifications.

Static LAGs use manual configuration and do not require LACP; LACP is only needed for dynamic link aggregation groups.