H31-311_V2.5 Exam Questions

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

G.707 multiplexing line diagram can only multiplex 2M\34M\140M signals into STM-N.

SDH can transmit signals of any rate in the SDH system after packaging.

Full-duplex means that data can be sent and received simultaneously without interfering with each other.

TTL, time to live, is mainly used to limit the number of hops that an IP data packet can pass through the router in the network. If TTL=1, it means that the data packet can only be...

The OTN electrical layer SM, PM, and TCMi overheads all contain a 1-byte BIP8 field, and the frame structure ranges they monitor are different.

OTUk_LOF is an OTUk layer alarm, indicating OTUk frame loss. The FAS frame alignment overhead is detected. If the frame is out of sync for 5 ms, this alarm is reported. The alarm e...

OCI stands for Open Connection Indication, a signal sent downstream, indicating that a management command issued upstream in the connection function has opened the matrix connectio...

Subnet division can reduce network traffic, improve network performance and simplify management.

E1 has three modes: framing, multi-framing and unframing. The main difference is the time slot used for transmitting valid data.

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

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, theoretically, sign...

In the SDH frame structure, the trace bytes are J0, J1, and J2.

Corresponding to the ISO seven-layer model, Ethernet corresponds to the physical layer and network layer of the seven-layer model, while the specifications defined by Ethernet incl...

1: N linear multiplex segment switching requires the APS switching protocol; equipment from different manufacturers may not be able to connect due to different protocol processing.

After TCM monitoring is enabled, when the upstream station detects a LOF alarm, it will insert IAE and the local end will report the ODU1_TCMn_IAES performance event.

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

If the virtual cascade group at one end of the equipment has LCAS enabled, but the other end has not enabled LCAS, the local end reports the LCAS_FOPR alarm.

Which of the following is the maximum number of OSN3500 subracks that can be installed in a 22- meter cabinet?

For OSN3500, which of the following boards provides centralized backup function for the +33V power supply of each board in the subrack?

Which of the following is the meaning of "L" in the optical module parameter "L-642"?

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

Which of the following is the impact of changing the NE ID of OSN3500 on NMS?

Which of the following statements about overhead bytes is wrong?

Which of the following factors determine that the optical signal-to-noise ratio (OSNR) at the receiving end is reduced to a certain extent? In the WDM system, after the signal is t...

Which of the following methods can be used to multiplex low-order ODUk into high-order ODUk?

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

PAUSE frames use a reserved multicast address and are not forwarded by bridges or switches. Thus, PAUSE frames do not generate any additional information.

Which of the following is the basic requirement of DWDM system on the light source?

The unprotected chain consists of four network elements: NE1, NE2, NE3, and NE4. An end-to- end VC4 path NE1-NE4 is created, and NE5 is added between NE2 and NE3 for capacity expan...

Which of the following logic function blocks is used to generate an R-LOS alarm?

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

The rate of STM-1 is () bit/s.

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

Are the following statements about the definition of SDH correct?

Which of the following local maintenance terminals can be used to manage MSTP equipment?

Which of the following alarms will not trigger an AU-AIS alarm?

Which of the following features must be enabled on the port when configuring a VLAN-based service type?

Which of the following light sources has the best dispersion tolerance and stability?

Which of the following statements about ODUkPMBDI are correct?

Which of the following is a functional unit that provides serial data to the interface and system associated with the orderwire telephone?

Which of the following is the unit that converts non-standard wavelengths to standard wavelengths specified by ITU-T?

Which of the following descriptions of the GFP encapsulation protocol is wrong?

The wavelength division system mainly uses DCM compensation to compensate for chromatic dispersion. Which of the following descriptions about DCM dispersion compensation is wrong?

What is the structure of STM-16?

In a wavelength division multiplexing system, when the number of wavelengths is less than how many, is it ideal to use a dielectric thin film filter?

MSTP equipment not only has the protection, recovery, OAM and other functions of SDH equipment, but also adds a service board that provides multi-service access.

The MAC address has 48 bits in total. The first () bits represent the device vendor code, and the last () bits are allocated by the device vendor.

Which of the following networking types is optical line protection mainly used in?

What kind of cascading method does the EoS board of OptiX OSN equipment use to form VCTRUNK?