H31-311_V2.5 Exam Dumps - HCIA-Transmission V2.5
Which of the following is the difference between an AU pointer and a TU pointer? (Multiple choice).
SES: There are 5% or more of the False blocks or at least one defect (OCI/AIS/LCK/IAE/LTC/TIM/PLM) in one second.
The last 256 columns in the OTN frame structure are the FEC regions for forward False correction.
Which of the following is the basic requirement of the DWDM system in the light source?
When the ACT indicator of the SDH board is off, it means that the board has a hardware failure and cannot be used.
Automatic Laser Shutdown (ALS): When no optical signal is received, the ALS function automatically turns off the corresponding optical module. This feature protects field maintenance personnel.
Which of the following logic function blocks are involved in processing clock signals? (Multiple choice).
QinQ technology can be used when multiple users need to share the same VCTRUNK and use the same VLAN ID.
Which of the following device domains can be managed by U2000? (Multiple choice).
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.
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.
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.
Which of the following communication protocols are used for DCN management of Huawei devices? (Multiple choice).
Which of the following light sources has the best dispersion tolerance and stability?
When the working PQ1 board is oversized, the device will perform and the TFS protection will be reversed. Which of the following statements about the switching process are correct? (Multiple choice).
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?
After configuring PDH on a per-net element basis, the full trace cannot be searched. Which of the following is a possible cause? (Multiple choice)
Which of the following is the VLAN classification method? (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.
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–¡
Which of the following statements about signal label byte C2 are incorrect?
When the J1 byte does not match, an alarm () is reported and the service may be interrupted.
When using the LCAS function, which of the following overhead bytes is used to transmit control information? (Multiple Choices)
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).
The scope of management of OMSn is the path from the input optical port on the multiplexer unit of the sending site to the output optical port on the multiplexer unit of the receiving site, called the optical multiplexing segment (OMS) path.
Compared with dense wavelength division multiplexing (DWDM) systems, crude glass division multiplexing (CWDM) systems provide a certain amount of glass length and transmission distance within (kmkm), which greatly reduces system cost and has strong flexibility
Single-fiber bidirectional WDM systems use only one optical fiber to transmit optical signals in both directions at the same time. Light signals in both directions should be arranged at different wavelengths.
The 1510nm optical monitoring channel can be effectively amplified after passing through EDFA.
When the fiber between node A and node B is disconnected, the RU on node B detects OTS_LOS alarm and will OTS_BDI The ru of the alert inserted into node A of node A forces reports OTS BDI alarms. The board reports och_SSF alarm on the downstream C node.
The value of the MFAS byte increases with the sequence number of the OTUk/ODUK base frame and includes the most () base frames.
In the case of a 1+1 linear MSP, which of the following switching modes does not require the APS protection protocol full (multiple choice) to be enabled
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?
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?
When performing fiber cut-off test on an ordinary MSP ring, which of the following alarms will be reported? (Multiple choice).
Which of the following bytes can be used for wired phones between two REG devices?
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.
In WDM systems, it is ideal to use a dielectric thin film filter (TFF) when using less than () wavelengths.
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.
K1 and K2 bytes can send APS switching signaling or indicate that the multiplexed segment signal is invalid.
In the Windows operating system, the log files of the U2000 program are stored in the () directory of the U2000 installation disk.
The number of ODU2e signals multiplexed into the ODU3 signal is the same as the number of ODU2 signals multiplexed into the ODU3 signal.
Which of the following local maintenance endpoints can be used to manage MSTP devices?
Which of the following is affected by changing the element ID of OSN3500 on NMS?
Which of the following statements regarding the protection of the cross-connecting plate 1+1 is 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?
Which of the following can be used as the central wavelength of the pump source in EDFA? (Multiple choice).
On a Layer 2 switching device, if the Ethernet port is an Access port, the port can only receive Ethernet frames without a VLAN tag or Ethernet frames with the same VLAN ID as the default VLAN ID of the port.