H31-341_V2.5 Exam Questions

When the cross-connect board is configured with 1+1 hot backup, under normal switching conditions, the replacement of the cross-connect clock board will not affect the packet servi...

The subnet mask of 255.255.255.248 is calculated according to the calculation formula. It can accommodate 23 devices, that is, 8 devices.

The OTN electrical layer SM, PM, and TCMi overheads all contain a 1-byte BIP8 field: they monitor different frame structures.

For the relay-type OUT, all alarms of the SM segment are terminated at the local station and will not be sent downstream (except OTUk LOF inserted downward into ODUk PM_AIS). Other...

SF is a signal failure event and SD is a signal degradation event. Both SF and SD events are conditions for triggering protection switching; however, whether SD time is used as a c...

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

For Huawei equipment, the NODE ID is the unique identifier of the intelligent network element on the control plane. After the network is configured with intelligent services, the N...

MPLS APS is a network protection mechanism, which implements service switching through the detection function of MPLS OAM.

When the circuit board detects the B1 byte and finds that the bit error rate of the signal in the regeneration section exceeds 10-3, it reports a B1_SD alarm.

GFP-F is a packet data (PDU)-oriented processing mode. It encapsulates the entire packet data into the GFP load information area, does not make any changes to the encapsulated data...

For ODUk SNCP protection, if the pass-through station is an electrical relay station, it is recommended to configure the SNCP type as SNC/I when configuring protection.

The LER in the MPLS network is a kind of LSR located at the edge of the network.

SOM (Smart Optical Management) is only an optical tube system, which can realize centralized configuration of optical and electrical layer parameters.

Line boards selectively receive service in case of SNCP. So SNCP can protect the service on the line.

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

After subnetting, network traffic can be reduced, network performance can be improved, and management can be simplified.

Inter-board crossover mainly includes two application scenarios: client-side service drop-in and WDM-side service pass-through.

When ODUk SNCP protection is configured, ordinary WDM services can be converted to SNCP services, but SNCP services cannot be converted to ordinary WDM services.

NG WDN ASON network can provide services of different service levels according to different levels of customer needs. The electrical layer ASON at the WDM service layer supports th...

The optical amplification unit can make up for the line loss and increase the transmission distance, and the system transmission distance can be extended to infinity through multi-...

The SDH network will not change the structure and rate of the client-side signal.

The collection and storage of on-site data includes regular collection when the equipment is in normal operation and collection when the equipment fails the network. Generally, bef...

The OTN circuit board of OSN 1800V (such as: ND2) can reflect the high or low optical power of the receiving end at the local end through the status of the indicator light on the p...

When the ACT indicator of the SDH board is off, it means that the board has a hardware failure and cannot be used.

When VC-4 and AU-4, VC-12 and TU-12 have no frequency difference and phase difference, the value of AU-PTR is 522 and the value of TU-PTR is 70

The transmitting light source in the integrated DWDM system must strictly abide by the G.693 optical port specification.

The key to NG WDM system fault location is to accurately locate the fault to a single station.

In the process of configuring E-LAN, the "MAC address" learning mode can be set to SVL and IML. SVL is independent VLAN learning, /VL is shared VLAN learning.

RSOH, MSOH, HPOH and LPOH realize the monitoring function in descending order of the monitoring range.

OSN 3500 branch service has strong up and down capabilities: there are 16 branch outlet slots, 504 2M, 32 E4, 117 E3/DS3, and 132 STW-1e to provide STM-1/4/16/ 64 group rate

OSN 8800 equipment adopts fan redundancy protection. When any fan in the fan box is broken, the system can still run normally for a long time.

SDH can transmit any rate signal in the SDH system after being packaged.

TTL. Time to live is mainly used to limit the number of hops that IP data packets can pass through routers in the network. For example, TTL=1 means that the data packet can only be...

The OptiX NG WDM device only supports the global label control, and the size of the label control is 32768.

When deleting a discrete service, deactivate it first, and check the alarm at this time. If there is no PS, TU-AIS and other alarms, it means that it is a garbage service. If there...

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.

MPLS technology introduces the concept of connection-oriented label switching on the connectionless IP network, and integrates IP technology and ATM label switching technology.

MPLS is not a service or application. It is actually a tunneling technology.

The optical and electronic racks of the OSN 9800 equipment communicate through master-slave sub-rack cascading, and are connected through the GE1/2 ports on the CTU single board.

FXS and FXO are the names of ports used by analog telephone lines. FXO and FXS are always used in pairs.

According to the recommendation of ITUT, the requirement that the MSP switching time should be within 50ms is conditional. For example, the number of network elements on the entire...

Through the northbound interface, the U2000 can be flexibly interconnected with different third- party network management systems to provide physical storage and alarm data informa...

In the extended SSM ring network dual BITS clock protection scenario, in order to prevent the clock signal from forming a loop, you only need to configure the external clock source...

The OSN 1800 V subrack can support the AC power solution, and the power supply board is APIU.

For MSTP equipment, the service layer path is the path that exists on the network management side, and the client layer path is the path that exists on the network element side.

There is a slot mapping relationship between the OSN3500 processing board and the interface board. The processing board in slot 1 maps to the interface boards in slots 19-20.

1510nm optical monitoring channel can be effectively amplified by EDFA.

The levels of forced switching, fiber cut switching, manual switching, and practice switching are arranged from high to low.

Physical port: also known as MAC port. It is the external port of the single board.

In the WDM network design, as long as enough EDFAs are cascaded to compensate the optical power loss in the transmission process. Then the system can transmit very long distance wi...