H31-341_V2.5 Exam Questions

The number of E1 frames that can be encapsulated in a CESoPSN message is determined by the "package loading time".

Bit errors may occur if the received optical power is close to the sensitivity, and bit errors may also occur if the received optical power is close to the overload point.

Compared with the SDH system, the WDM system improves the utilization of optical fibers by dividing optical fibers into "multi-lanes"

OptiXtrans E9600/optiX OSN 9800 has a large cross-connection capacity and is mainly used in the metropolitan area/aggregation layer, while the OptiXtrans E6600/OptiX oSN 1800 has a...

In the OTN network, once the FOADM site wavelength path is successfully configured, it does not support network management side changes.

Configuring ROADM sites will enable multi-dimensional wavelength-level service scheduling without manual fiber jumping.

The unit of insertion loss is dBm.

The gain wavelength of the fiber Raman amplifier is determined by the wavelength of the pump light. As long as the wavelength of the pump source is appropriate, the signal amplific...

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

Among OTN network interfaces, the internal network interface of the same operator is an intra- domain interface. The intra-domain interface is divided into indirect laVI of differe...

The so-called full duplex means that data can be sent and received simultaneously without interfering with each other.

Mandatory switching. Fiber switching manual switching and motion switching are in descending order of priority.

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

When creating an electrical layer path, one RX/TX port can only establish a connection with one optical channel of the clientLP port.

After the U2000 delivers configuration data to the NE, if the verification of the SCC board fails, the NE enters the installation state.

If the SNCP services with the same source-sink or route are grouped, the SNCP switching speed can be improved.

Both the extended ECC and the ECC physical layer use the DCC channel.

The U2000 can be flexibly interconnected with different third-party NMSs through the northbound interface (NBl) and provide physical inventory and alarm information for the upper-l...

PRBS can be used to test whether the SDH service is normal and whether the protection switching function is normal.

LDG supports electrical layer scheduling at the ODU1 level.

The number of network elements (including REG) in the two-fiber bidirectional multiplex section shared protection ring may exceed 16.

When multiple alarms are reported, the priority principle of alarm processing is as follows: according to the priority of equipment type alarms (BUS_ERR, HARD_ERR, COMM FAIL, etc.)...

The CX plug in OSN550 includes a function board integrated system control and communication (SCC) unit cross-connect unit and clock unit. According to the functions and access func...

MPLS label allocation is divided into static allocation and dynamic allocation. The static allocation label has no allocation principle as long as the values of each label are diff...

MPLS-TP is a subset of MPLS, which removes the connectionless IP-based forwarding and adds the end-to-end OAM function.

When using the single-board method to create an OCh path, select the corresponding line board and the IN/OUT port of the FIU board for the source/sink ports respectively.

When U2000 performs synchronization, the same network element data as U2000 will not be uploaded to U2000, and the data that exists on 2000 but not on network elements will be dele...

Dividing VLANs can prevent broadcast storms and improve network efficiency. It makes the network more secure.

The cascading methods for mapping Ethernet services to SDH include adjacent cascading and virtual cascading.

The control link and the control channel have different functions and are independent of each other. The control link is flooded to the whole network by the OSPF protocol, and each...

Both the SC2 and ST2 boards support the processing and transparent transmission of 1588V2 signals.

Frame-Mapped GFP (GFP-F) is a processing mode for data encoding blocks (such as Fiber Channel and ESCON).

The output network requires a higher cost than the belt network. But provides a more reliable management channel.

The single-fiber bidirectional WDM system only uses one optical fiber to transmit optical signals in two directions at the same time. The optical signals in the two directions shou...

The VLAN domain can isolate the unicast packets of different users and also isolate the broadcast packets of different VLANs.

OChr means use of electrical monitoring techniques

MC_ LAG can only be configured in non-load sharing mode.

When different routes are used for the 1+1 protection of the customer example, the working wavelength and the protection wavelength cannot use the same wavelength.

Array grating (AWG) multiplexer/demultiplexer has the following advantages: short wavelength spacing. large channel and flat passband. Suitable for ultra-high-speed and large-capac...

The Ethernet board has an external port (Port) and an internal port (VCTRUNK). The external port can set the Tag attribute, and the internal port cannot set the Tag attribute.

When using the path method to create a Client path, if there is an RLOS alarm on the line board, the path cannot be created.

40Gbit/s and 100Git/s coherent systems do not require dispersion compensation because the coherent board has a large dispersion tolerance. NG WDM does not support mixed transmissio...

The number of ODU2e signals multiplexed into ODU3 signals is the same as the number of ODU2 signals multiplexed into ODU3 signals.

In the OSN 1800, the LOA single board can implement the Layer 2 scheduling function of the Ethernet.

After enabling TCM monitoring, when the upstream station detects a LOF alarm, it will plug in the IAE local end and report the ODU1_TCMn_IAES performance event.

OTUk LOF is an alarm at the OTUk layer, indicating that the OTUK frame is lost and the FAS frame alignment overhead is detected. If the frame is out of sync state for 5ms continuou...

The device IP addresses of gateway network elements and non-gateway network elements must be set on the same network segment.

The transmission plane mainly completes functions such as optical signal transmission, multiplexing, configuration protection switching, and switching and connection. And ensure th...

OLA sites can also use ESC.

The functions of MG-SDH digital single-core can be expanded through software upgrades.