H31-311 Exam Dumps - HCIA-Transmission V2.0

Which of the following layers defines the protocols that control the network layer? The protocols of the layer work on logical links, that is end-to-end connections between two devices.

Which of the following logical functional modules are involved in processing clock signal? (Multiple Choice)

During the service configuration between two adjacent sites (NE1 and NE2), if VC4:1 and VC12:l-3 are used on the NEl's line board connected to NE2, the same VC4 and VC12 timeslots must be used on the NE2's line board connected to NE1.

Which of the following statements about clock sources is incorrect?

Some of the SNCP protection switching conditions are default, such as AU-AIS and TU-AIS. Others conditions are optional, such as HP-TIM and HP-SLM. The optional conditions can be flexibly set based on service levels.

SES: There are 5% or more than 5% bit error blocks or at least one defect (OCI/AIS/LCKAAE/LTCA1M/PLM) within one second.

When bit errors are detected in the B2 byte, which of the following alarms is reported by the peer end?

Which of the following statements about overhead bytes is incorrect?

By default, the B2-EXC alarm is reported when the number of B2 bit errors exceeds the ( ) threshold.

Which of the following statements about the definition of SDH is correct?

On the OSN series transport devices, Ethernet ports cannot access tagged frames and untagged frames at the same time,

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

Optical supervisory channels are intended for the supervisory of WDM optical transmission systems. In ITU-T recommendations, 1510 nm wavelengths at a ( ) rate are preferentially used.

Only one TCM can be used at a site.

The rates of the SF64 and SL64 boards are both STM-64. Therefore, the two boards can be interconnected.

Configuring an EPLAN service as a ring is not recommended. If the EPLAN service is configured as a ring, the STP protocol must be enabled on the network to prevent broadcast storms.

Which of the following is the multiplexing mode of SDH?

Compared with a dense wavelength division multiplexing (DWDM) system, a coarse wavelength division multiplexing (CWDM) system provides a certain number of wavelengths and a transmission distance within ( ) km, which greatly reduces system cost and has strong flexibility.

The frame structure of 0DU4 is four times that of ODU1.

Which of the following statements about U2000 license is incorrect?

Which of the following ITU-T recommendations defines the OTN frame structure?

When the LCAS function is used/ which of the following overhead bytes are used to transmit control information? (Multiple Choice)

Which of the following are optical-layer trails? (Multiple Choice)

For 100G (112 Gbit/s) signals, the actual data baud rate is only 28G baud.