H31-311_V2.5 HCIA-Transmission V2.5 Question and Answers

Which of the following maintenance signals is transmitted from the downstream site to the upstream site of the OTN?

In WDM systems, it is ideal to use a dielectric thin problem filter (TFF) when using less than () wavelengths.

When the low-level resources of the device are insufficient, which of the following measures can be taken? (Multiple choice).

According to ITU-T's recommendations, the requirement that the MSP switching time should be within 50ms is conditional. For example, the number of net elements on the entire ring network is less than 16.

When a bit False is detected in B2 bytes, which of the following alarms is reported by the peer?

Which of the following is not a nonlinear effect?

Which of the following bytes can be used for ordenwire calls between two REG devices?

PRBS can be used to test that the SDH service is healthy and that the protection reversal function is working.

Which of the following can be configured as the monitoring time for network element performance events?

The device IP address of the gateway element and the non-gateway element must be set in the same network segment.

What are the basic features of the U2000? Multiple Choices

Which of the following is the steps to multiplex a low-speed service into a high-speed SDH service? (Multiple choice).

An unprotected chain consists of four net elements; ME1, NE2, NE3 and NE4.

Create an end-to-end VC4 path NE1-NE4 and add NE5 between NE2 and NE3 for capacity expansion.

The original configuration remains unchanged and no services are configured on the NE5.

In this case, the unprotected chain becomes NE1-NE2-NE5NE3-NE4, how many VC4 paths can be searched?

The backplane has two 48V power cords, and each board gets two -48V power supplies from the backplane. After combining the power supply via diodes, the various voltages required for each component are obtained by means of a DC/DC power module and a linear mane swap.

When the J1 byte does not match, an alarm () is reported and the service may be interrupted.

Which of the following is not the advantage of WDM?

The last 256 columns in the OTN frame structure are the FEC regions for forward False correction.

Suppose 2 VC-12 time slots need to be bound to the VCTRUNK1 of the N2EFS4 board. When there are 8 VC4 slots on the N2EFS4 board, which of the following slots meets the requirements?

For 100G (112Gbit/s) signals, the actual data baud rate is only 28G amplitude.

When using the LCAS function, which of the following overhead bytes is used to transmit control information? (Multiple Choices)

The AAC address consists of 46 bits and is globally unique

Which of the following - is the meaning of the eighth-digit MAC address with 1?

QinQ technology can be used when multiple users need to share the same VCTRUNK and use the same VLAN ID.

Which overhead below 112 is not ODUk overhead?

When the U2000 is synchronized, the same network metadata as the U2000 is not uploaded to the U2000, and the data that exists on the U200 but does not exist on the network element is deleted.

When you configure services on a per-NE basis, which of the following protection scenarios does not require subnet configuration before subsequent protection operations?

Frame-Mapped GFP (GFPF> is a processing mode that targets data encoding blocks such as Fibre Channel and ESCON.

Which of the following statements about basic LCAS functionality are correct? (Multiple choice).

In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and weight and usage information of the clock source?

A PAUSE frames use reserved multicast addresses and are not forwarded by bridges or switches. In this way, the PAUSE frame does not generate any additional information.

Which factors determine the optical signal-to-noise ratio (OSNR) of the receiving end to a certain extent After the signal transmission in the WOM system is transmitted over a certain distance, the "oSNR" of the receiving end of the optical signal-to-noise ratio is reduced to a certain extent. Which of the following is the main cause?

Which of the following bridges are used to forward data based on the MAC address and VLAN ID carried in the data?

The SP3D board supports 63 E1 services

The OTN signal has a fixed pad period, the same frame period as the SDH signal.

The number of bit False blocks on each VC4 channel is detected by B3 on the receiving side. At the same time, the information is sent back to the sender via Q, and HP-REI and HP-FEBBE report on the sender.

Measure the False correction capability of fec with encoded gain. Which of the following statements about the coding gain is incorrect?

Optical monitoring channel is used for monitoring of WDM optical transmission systems. In the UU-T recommendation, it is preferable to use a 1510 nm wavelength of the a ") rate.

Which of the following statements about the EFS4 board are correct? (Multiple choice).

For osn3500, which of the following boards provides centralized backup capability for the +3.3V power supply of each board in the sub-shelf?

The MAC loopback and PHY loopback are used for fault location. When the MAC loopback is set to in loop, the PHY loopback can be set according to the actual situation.

Which of the following is the difference between an AU pointer and a TU pointer? (Multiple choice).

When configuring LMSP, there are two switching modes: single-ended switching and double-ended switching. Single-ended switching does not require the protection protocol to be enabled.

According to the formula "ODUk rate = 239/(239k) x STMN frame rate", ODU4 The rate is equal to 239/235× STMN frame rate.

When using a script to back up and restore network configuration data for the U2000, you can change the directory where the export file is saved.

Which of the following statements about extending the ECC is incorrect?

The dual fiber ring topology consisting of three network elements is arranged in counterclockwise order as the service between A, B and C A and C occupies the first VC-48 on the short path VC-12 time slots, B and C of the same service also occupy the 48th of the first VC-4 on the short path VC-12 time slots

Which of the following statements regarding the protection of the cross-connecting plate 1+1 is correct? (Multiple choice).

When the SNCP ring consisting of four Optis OSN 2500 devices has a rate of 25 Gbt/s, the network's service answer stars can carry up to ()2Mt/s Signal.

When using a script to back up U2000 data, the backup speed is fast because the backup file is small.

RSOH, MSOH, HPOH and LPOH implement the monitoring function in descending order of the monitoring fan country.

Bait-doped fiber amplifiers (EDFAs) are a key component of the new generation of optical communication systems. Which of the following is the feature of EDFA? Multiple Choice) â–¡

When there is a Critical False In Seconds (SES) in the PM portion of the ODUk layer, which of the following alarms is reported by NMS?

Coherent receiver technology uses a local oscillator laser with the same frequency as the received signal to perform coherent processing and recover () information from the received signal. (Multi-quality selection.)

During service configuration, there are two time slot modes. Huawei uses interleaved time slot mode by default.

Which of the following bytes in the regenerator part overhead are associated with R-OOF and R-LOF? (Multiple Choices)

Which of the following is not a condition that triggers multiplexed segment protection (MSP)?

NE A and NE B are adjacent NE

If B3 and low-order Falses occur in the A->B direction, and B1, B2, B3, and low-order Falses occur in the B->A direction, it is caused by Which of the following performance events does NEA report? (Multiple choice).