H31-311_V2.5 Practice Exam Questions with Answers HCIA-Transmission V2.5 Certification

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

Array waveguide grating (AWG) multiplexer/multiplexer has the following advantages: short wavelength spacing, large number of channels and flat passband. Suitable for DWDM systems in ultra-high speed, large tubes.

Which of the following layers define the protocols that control the network layer? The protocol for this layer applies to logical links, i.e. end-to-end connectivity between two devices.

Which of the following technologies is the main difference between an open DWDM system and an integrated DWDM system?

Which of the following can be used as the central wavelength of the pump source in EDFA? (Multiple choice).

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

output networks require higher costs than belt networks, but provide a more reliable management channel.

Which of the following statements about overhead bytes is incorrect?

Which of the following logical function modules is used to generate exhaust R-LOS alerts?

For OSN3500, there is a slot mapping relationship between the processing board and the interface pre-processor. The processing board in slot 1 maps to the interface board in slots 19-20.

Which of the following statements about signal label byte C2 are incorrect?

Which of the following statements about the U2000 license is incorrect?

OChr means the use of electrical monitoring technology.

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.

Only one TCM can be used at one site

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

When performing fiber cut-off test on an ordinary MSP ring, which of the following alarms will be reported? (Multiple choice).

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

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 of the following device domains can be managed by U2000? (Multiple choice).

Which of the following clock operating modes supports the ITU-T G.781 standard? (Multiple choice).

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

Which of the following is the meaning of SFD in the Ethernet frame structure?

The SP3D board supports 63 E1 services

Which of the following are the service board types for MSTP devices? (Multiple choice).

The working mode of the port determines the flow control mode of the port.

When the operating mode is 100Mbit/s full duplex, one of the following flow control modes can be used

WDM transmits optical signals multiplexed at multiple rates (wavelengths) through a single optical fiber, and the digital signals carried by these optical signals must have the same rate and data format

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 light sources has the best dispersion tolerance and stability?

For (on-premises) HA solutions where active and standby servers are deployed in the same location, which of the following platforms can be deployed? (Multiple choice).

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

MSP is a network-level protection scheme. MSF does not directly protect services, and MSP switching and recovery are not affected even if there is no service on the MSP ring.

The optical amplifier unit compensates for line losses and extends the transmission distance. Connecting multiple optical amplifier units in cascaded mode allows for extended transmission distances without following the system.

EPL services use ports and bandwidth exclusively, and different users may need to share resources. Which of the following methods can be used to isolate user data?

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 statements about ODUk_PM_BDI is correct?

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.

Which of the following communication protocols are used for DCN management of Huawei devices? (Multiple choice).

The1310nm and 1550nm transmission windows are low loss windows. In DWDM systems, only the 1560m transfer window is used. Which of the following is the main cause?

Which of the following is the multiplexing method of SDH?

During service configuration, which of the following service levels cannot be selected?

When configuring the SXCS single board for the OSN3500, which of the following is the access package of the fully configured substand?

OSN1500/2500/3500/7500 supports DC and AC power inputs.

Which overhead below 112 is not ODUk overhead?

Configuring the EPLAN service as a ring is not recommended. If the EPLAN service is configured as a ring network, the STP protocol must be enabled on the network to prevent broadcast storms.

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) ?

Which of the following are the components of the WDM system summer with N glass lengths? (Multiple choice).

Which of the following is the default WTR time for MSP switching?

The standard Ethernet frame length should not be less than 64 bytes Which of the following factors contribute to this limitation? (Multiple choice).

Which of the following statements about the OTM-n .m and OTMnr .m for OTN are incorrect?

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.

For alignment; Indicates the starting position of VC-n in the corresponding AU or TU frame. • This way: The receiver can correctly remove the corresponding VC from STM-N, and then The VC and C packages are separated into separate low-rate signals, such as PDH, which means that the low-rate path signal can be dropped directly from the STM-N signal.

Which of the following logic function blocks are involved in processing clock signals? (Multiple choice).

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.)