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

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

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

Linear MSP (LMSP) has two modes: 1+1 and 1:1. Additional services can only be configured for the protection channel in 1:1 mode of the LMSP.

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

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

Which of the following statements about the sequence of a signal flow between the SDH interface and the cross-connect unit is true?

Which of the following ITLI-T recommendations define the OTN frame structure?

According to the formula "OTUk rate = 255/(239 - k) x STM-N frame rate", the OTU3 signal rate is 255/236 x STM-N frame rate.

Which of the following is the multiplexing method of SDH?

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

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

For MSPs, you need to set the MSP protocol ID for each NE. To ensure that each ID is unique, it is recommended to set the MSP protocol ID to the value that is compatible with the network element ID.

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

After signals are transmitted for a certain distance in a WDM system, the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent. Which of the following Is the main cause?

If you group SNCP services with the same source, sink, or route, you can increase the SNCP switching speed

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?

The difference between dispersion compensation fibers and ordinary optical fibers is that the dispersion compensation fibers have a negative dispersion coefficient at ().

In the system control unit, which of the following databases does not lose data after a power failure? (Multiple choice).

The index is used to folio and delineate the starting position of VC-n in the corresponding AU or TU frame so that the receiving end can correctly remove the corresponding VC from the STM-N The VC and C packages are then separated into separate low-rate signals, such as PDH That is; Low-rate branch signals can be discarded directly from the STM-N signal

If a network port that supports autonegotiation is connected to a network port that does not support autonegotiation, you can interconnect in both half-duplex and full-duplex modes.

A light wave has two independent and orthogonally polarized modes on the plane perpendicular to the transmission direction, which are generally called X polarization and Y polarization respectively. Using this property of optical signals, the polarization multiplexing separately modulates optical signals on the two orthogonal polarizations.

According to the formula "ODUk rate = 239/(239k) x STM-N frame rate", ODU4 The rate is equal to the 239/235xSTM-N Pa rate.

What are the basic features of the U2000? Multiple Choices

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.

TU-AIS is often encountered during network maintenance. Which of the following alerts can trigger a TU-AIS alert? (Multiple choice).

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

After a user adjusts service bandwidth, the NCE Controller delivers the new bandwidth to devices and adjusts the CIR and PIR of the service PW. During the adjustment, services are not interrupted.

The value of the MFAS byte increases with the sequence number of the OTUk/ODUK base frame and includes the most () base frames.

Some SNCP protection inversion conditions are default, such as AU-AIS and TU-AIS. Other conditions are optional, such as HP-TIM and HP-SLM. Optional conditions can be flexibly set according to the level of the costume.

PDM uses a polarization beam splitter to divide the laser into two vertical directions: x and y.

In the colored scenario, the TM20fTD20 board can be used to add/drop wavelengths.

LCK insertion takes precedence over AIS insertion. That is, if the user configures LCK insertion and the conditions for automatic AS insertion are met, the LCK is inserted.

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

The frame structure of ODU4 is four times that of ODU1

Which of the following local maintenance endpoints can be used to manage MSTP devices?

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 alarm/event storage modes does U2000 support? (Multiple choice).

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.

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?

Which of the following statements regarding multiplexing partial remote False indication (MS-REI) is correct?

(1) B2 bytes indicate the transmission channel.

(2) The M1 byte represents the transmission channel

(3) THE MS-REl is sent from the receiver to the source.

(4) MS-REI is transmitted from the source to the receiver.

(5) Indicates the number of bit Falses detected by the receiver after receiving the MS signal.

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.

The interval between two adjacent pointer alignment events is at least () frames.

When the bridge uses IVL learning mode, an entry in the MAC address table is created based on the source MAC address and source port of the teach frame. This entry applies to all VLANs

The receiver performs a BIP-8 check on unscrambled STM-16 frames. If the BIP8 check result XOR·?, the value of the B1 byte contained in the next STM16 ring is 10001100, which indicates STM-16 There is a () bit False block in the axis.

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

The refractive index n1 of the fiber core must be the Q of the cladding refractive Mo n2, which is a necessary condition for transmitting the optical signal in the optical fiber.

In the case of SNCP, the board selectively receives the service. Therefore, SNCP can protect services on the line.

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

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)

When ODUk 5NCP is configured, common WDM services can be converted into SNCP services, but SNCP services cannot be converted into common WDM services.

Which overhead below 112 is not ODUk overhead?

Which of the following are the main advantages of SDH?

Which of the following is not the advantage of WDM?

After the U2000 sends configuration data to the network element, if the SCC single board authentication fails, the network element enters the installation state.

Which of the following statements about ODUk_PM_BDI is correct?

Which of the following is the configuration mode for the new NE?( Multiple choices).

Forced switching, fiber switching, manual switching and motion switching are decreased in order of priority.

When the sender detects that the b6-b8 of the K2 byte is 110, it means that the sender has reported an alarm ().

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

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.

Manual configuration will clear the data on the NE side

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

Which of the following alerts does not trigger an AU-AIS alert?

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

EPL services use bandwidth exclusively on the line, which is very safe. Dedicated line applications for VIP customers

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

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