H31-341_V2.5 Exam Questions

If the network element ID is modified, the communication between the network management system and the network element will be interrupted, which may result in the loss of the orig...

The EPL service exclusively uses the bandwidth on the line. This is very secure. Dedicated line application for VIP customers.

When the fiber between node and node B is open, the RU on the node detects the OTS_LOS alarm and inserts the OTS_BDI alarm into the node A. The RU on the node A reports the OTS_BDI...

When using scripts to back up and restore U2000 network configuration data, the directory for saving exported files can be changed.

Corresponds to the ISO seven-layer model. Ethernet corresponds to the physical layer and network layer of the seven-layer model, and the specifications defined by Ethernet include...

When the PM segment of the ODUk generates seriously errored seconds, the network management will report the ODUk_PM_ES alarm.

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

While amplifying business signals, EDFA will also bring noise to the system, which is the main source of noise.

For a system with an optical amplifier, the upper threshold of the received optical power of the wavelength division side of the OTU single board and the line single board (APD typ...

In the G.652 and LEAF optical fiber system, isolation bands need to be set when super 100G and 10G are mixed.

The performance indicators of the OTN circuit board focus on the input optical power and bit error rate. Abnormal optical power may cause bit errors. If the input optical power is...

NG WDM equipment uses Ethernet frames to carry MPLS packets

In unstructured emulation mode (SAToP), WS-OTN equipment provides the function of compressing idle 64 Kbit/s time slots in E1 signals to save transmission bandwidth.

The main difference between the functional standardized optical transport unit OTUkV and the fully standardized optical transport unit OTUk lies in the allocation of FEC areas.

LAG can only be configured in non-load sharing mode

When static aggregation adds or deletes member ports, the LACP protocol must be run

When performing fiber synchronization, the network element does not create a fiber, indicating that the fiber connection only exists on the local network management side.

OTU_LOM is an alarm generated due to the out-of-multiframe (OOM) state lasting for 3ms.

The calculation of BIP-8 belongs to one of the source functions of the OTUk layer.

OTUk_LOM indicates an abnormal alarm of the frame alignment signal. If the frame alignment process is in the out-of-frame (OOF) state for 3ms continuously, this alarm is generated.

Inconsistent FEC sending and receiving configurations will cause service interruption.

Direct modulation is also called EA modulation. It does not directly modulate the light source, but adds a modulator to the output path of the light source to modulate the light wa...

The dispersion caused by the two orthogonal polarization states of signal light having different propagation speeds in the optical fiber is called polarization mode dispersion.

To prevent the optical power at the receiving end of the OTU board from being too high, it is necessary to configure a fixed attenuator according to the actual optical power. Fixed...

During the commissioning process, it is necessary to ensure that the input optical power of the OTU board is lower than the overload point to avoid burning the optical module or af...

Both the Ping function and the Traceroute function detect the bidirectional connectivity of the tunnel and PW by exchanging MPLS echo request and MPLS echo reply messages.

The rich overhead in the OTN special frame structure can operate, manage and maintain the signal during the transmission process, such as: SM, PM and TCMi and other overheads monit...

When configuring 1+1 optical line protection, you can choose RI1/T01 or RI2/T02 as the working channel according to the actual situation.

It is possible to convert ordinary WDM services to ODUk SNCP services, but the conversion of ODUk SNCP services to ordinary WDM services will cause service interruption

If you only need to use LAG for port-level protection, configure non-load-sharing LAG in the board.

The AM port of the TM20 board can input the combined signal

When super 100G/100G and 10G are mixed adjacently, the optical power of super 100G/100G signal should be higher than that of 10G signal, but it should not be higher than the single...

NG WDM devices only support the global label space, and the size of the label space is 32768

Insertion loss is the abbreviation of insertion loss, which refers to the power loss caused by inserting a component (such as a connector, coupler or joint) into an originally cont...

When the PW bears Ethernet services, two layers of labels are encapsulated, the outer label is PW, and the inner label is TUNNEL.

CC is used to detect the unidirectional connectivity between any pair of MEPs in the MEG. If the own-end MEP does not receive a CCM packet within 3 times the packet sending period,...

In the ring network with electric relay stations, if the signal type is OTUk, the subtype can be configured as SNC/I when ODUk SNCP protection is configured.

The algorithm based on IP address allocation belongs to the hash algorithm used in LAG load sharing.

In any scenario, hard reset of the main control board will cause service interruption.

When analyzing alarms, first analyze high-level alarms, such as critical alarms, and then analyze low-level alarms, such as major alarms.

By using the out-of-band FEC technology, the optical signal-to-noise ratio budget of the DWDM transmission network can be improved, and the length of the optical transmission secti...

Wavelength division multiplexing technology is to multiplex optical signals of different wavelengths into the same optical fiber for transmission.

96-wave OTM sites need to be configured with ITL for multiplexing and OBU amplifiers for signal amplification.

The single-wavelength optical power index of the 100G system is lower than that of the 10G system. The 10G system can expand the 100G channel by reducing the 0A gain, thereby reduc...

For a system without an optical amplifier, the lower threshold of the received optical power of the wavelength division side of the OTU board and the line board is the receiving se...

The number of signals multiplexed from ODU2e and ODU2 to ODU3 is 4.

If the tunnel where a PW is located is configured with Tunnel APs, the PW cannot be configured with PW APS.

The smaller the grounding resistance value of the equipment, the better. The smaller the value, the faster the current will be introduced into the ground.

For a point-to-point topology, it is necessary to set the TIM detection mode on the network management system to "only compare DAPI at the end of the path".

In order to maintain the alarm performance of the optical layer, it is necessary to ensure that the optical fibers on the network element side are connected correctly, so that the...