Real H31-311 Dumps - Huawei Correct Answers updated on 2022 [Q48-Q64]

Topic	Details
Topic 1	SDH networking and protection MSTP protection schemes
Topic 2	Demonstrate a good command of basic technologies such as SDH principles
Topic 3	Ethernet service overview MSTP system overview
Topic 4	WDM principles and OTN protocols Service configuration of MSTP
Topic 5	Ethernet principles OTN protocols SDH principles WDM principles

NEW QUESTION 48
An arrayed waveguide grating (AWG) multiplexer/demultiplexer has the following advantages: short wavelength spacing, large number of channels, and flat passband. It suits DWDM systems with ultra-high speed and large capacity.

TRUE

FALSE

NEW QUESTION 49
MAC loopback and PHY loopback are used for fault locating. When the MAC loopback is set to an inloop, you can set the PHY loopback according to the actual situation.

TRUE

FALSE

NEW QUESTION 50
In the case of 1+1 linear MSP, which of the following switching modes do not require the enabling of the APS protection protocol? (Multiple Choice)

Single-ended revertive mode

Single-ended non-revertive mode

Dual-ended revertive mode

Dual-ended non-revertive mode

NEW QUESTION 51
Which of the following clock working modes support the ITU-T G.781 standard? (Multiple Choice)

Tracing

Holdover

Free-run

Master/Slave

NEW QUESTION 52
Which of the following is not the northbound interface provided by the U2000?

XML

SNMP

CORBA

NEW QUESTION 53
In the frame structure of SDH signals, there are abundant overhead bytes used for operation, administration, and maintenance (OAM). The overhead bytes account for ( ) of all bits in the entire frame and greatly enhance the monitoring functions of the network.

1/10

1/20

1/30

1/40

NEW QUESTION 54
The error correction capability of FEC is measured with the encoding gain. Which of the following statements about the encoding gain is incorrect?

The error correction capability of FEC increases with the encoding gain.

When the BER is constant, the OSNR saved by the correction encoding is called encoding gain.

The encoding gain of the inband FEC is larger than that of the outband FE

The encoding gain of AFEC is larger than that of FE

NEW QUESTION 55
Which of the following is the frame whose VC-4 J1 byte is indicated by the current frame’s AU pointer?

Current frame

Next frame

Previous frame

None of the above

NEW QUESTION 56
The SL64 board can be used in an OSN 2500.

TRUE

FALSE

NEW QUESTION 57
OTM nr.m consists of a maximum of “n” optical multiplexing channels and does not support non-channel-associated overheads. The letter “r” indicates function reduction.

TRUE

FALSE

NEW QUESTION 58
Which of the following is the frame structure of STM-16?

9*270*1

9*270*4

9*270*16

9*270*64

NEW QUESTION 59
Which of the following operating systems support the installation of the U2000 client?

Windows

Solaris

SUSE Linux

All of the above

NEW QUESTION 60
Which of the following are different types of ESCs divided by implementation principles?

Inserted DCC

Fixed frame structure DCC

None of the above

Pilot tune DCC

NEW QUESTION 61
When a bridge uses the IVL learning mode, the entry in the MAC address table is created according to the source MAC address and source port of the data frame. This entry is valid for all VLANs.

TRUE

FALSE

NEW QUESTION 62
A two-fiber ring topology consisting of three NEs is arranged in the counterclockwise sequence as A, B, and C.
Services between A and C occupy the 48th VC-12 timeslot in the first VC-4 on the short path, and services between B and C also occupy the 48th VC-12 timeslot in the first VC-4 on the short path. In this case, which of the following is the subnet type of the ring protection?

Unidirectional path protection ring

SNCP ring

Bidirectional MSP ring r

All of the above

NEW QUESTION 63
Which of the following statements about OTN advantages is incorrect?

The WDM function is used to meet the requirement for Tbit/s bandwidth per fiber.

OTN provides a maximum of five levels of nested or overlapped TCM connection monitoring.

OTN provides powerful outband FEC functions to effectively guarantee the line transmission performance.

OTN provides 2.7 Gbit/s, 10.7 Gbit/s, 43 Gbit/s, and even 111.8 Gbit/s high-rate interfaces.

NEW QUESTION 64
When bit errors are detected in the B2 byte, which of the following alarms is reported by the peer end?

MS-AIS

RS-BBE