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H35-260 HSC - Transmission Question and Answers

Question # 4

The loss of optical fiber mainly includes the following?

A.

Absorption loss

B.

Reflection Loss

C.

Bending loss

D.

Scatter loss

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Question # 5

To determine whether the optical fiber lines and connectors on the wavelength division side are normal, which of the following loopback methods is most suitable?

A.

WDM side inner loopback

B.

WDM side outer loopback

C.

Client side loopback

D.

Client side outer loopback

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Question # 6

Which of the following light source technologies does the 100GOTU board use?

A.

Direct modulation light source

B.

Light source of EA modulation method

C.

MZ modulation light source

D.

Coherent reception modulation mode light source

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Question # 7

Any service cross-connect can only be configured in inter-board cross-connect, and does not require the participation of XCS boards

A.

True

B.

False

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Question # 8

Both the 1310nm and 1550nm transmission windows are low-loss windows. In the DWDM system, only the 1550nm transmission window is used. Which of the following options is the main reason?

A.

EDFA operating wavelength flat region includes this window

B.

Small nonlinear effects in the 1550nm wavelength region

C.

1550nm wavelength region is suitable for long distance transmission

D.

1550nm window loss is smaller than 1310nm window

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Question # 9

Which of the following services can IMA provide protection for?

A.

TDM business

B.

ATM Services

C.

E-Line Business

D.

E-LAN service

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Question # 10

Arrayed waveguide grating optical multiplexer and demultiplexer has the advantages of small wavelength interval, large number of channels, flat passband, etc. It is very suitable for ultra-high-speed, large-capacity wavelength division

multiplexing systems.

A.

True

B.

False

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Question # 11

Which of the following statements about optical line protection OLP is wrong?

A.

The OLP board is used to protect the powder fiber

B.

Segmentation protects the combined optical signal, and separate routing is used between sites

C.

Single-ended switching optical line protection requires APS protocol

D.

oLpz can only be fitted on the RU line side of each site

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Question # 12

STM-N signal transmission on the line needs to be scrambled, mainly to facilitate collection and extraction of line timing signals. Will all bytes in the SDH frame structure be

scrambled?

A.

True

B.

False

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Question # 13

In the NG-WDM system, which of the following boards supports optical line protection?

A.

OUT

B.

OLP

C.

DCP

D.

QCP

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Question # 14

When configuring electrical layer crossing, what are the rules for time slot configuration?

A.

For the convenience of management and maintenance, it is recommended to set the time slot cutting mode to automatic mode

B.

For each board, the same time slot in the same direction cannot be used by multiple services at the same time

C.

For the same service, the time slots occupied by the receiving turbulence and the transmitting turbulence in one direction must be the same

D.

After changing the service type, there is no need to reset the service time slot

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Question # 15

Which step is not included in the NE upgrade process of PTN equipment?

A.

Upgrade Feasibility Check

B.

Load the package

C.

to distribute

D.

Backup after activation

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Question # 16

The ETH_UWK_DOWN alarm indicates that the network port connection is faulty. The possible reasons do not include which of the following?

A.

The working modes of the sending and receiving ends are inconsistent

B.

Link failure

C.

Peer device failure

D.

There is no light received at the local end

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Question # 17

Which of the following optical loss alarms will not cause service interruption?

A.

CHAN_LOS

B.

R_LOS

C.

MUT_LOS

D.

OSC_LOS

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Question # 18

Which of the following statements about multiplexed partial range error indication (MS-REI) is true

â‘  B2 byte represents the transmission channel.

â‘¡ M1 byte folder indicates the transmission channel

â‘¢ MS-REI is sent from the receiver to the source.

â‘£ MS-REI is transmitted from source to receiver

⑤ Indicates the number of bit errors detected by the receiver after receiving the MS signal.

A.

①④⑤

B.

②④⑤

C.

①③⑤

D.

②③⑤

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Question # 19

Which item is wrong about the description of PTN network MC-PWAPS protection features?

A.

1+1 mode is not supported

B.

DNI-PW can only be used to transmit base station traffic

C.

DNI-PW supports multi-hop, but single-hop PW is recommended for service deployment

D.

The existing network is generally not linked with MCLAG

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Question # 20

Which of the following is impossible for the cause of the ETH_LOS alarm?

A.

The cable or fiber of the Ethernet port is not properly connected

B.

Cable or fiber failure

C.

The received optical power of the local network element is too low

D.

In-port loopback

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Question # 21

In Optâ…¸PTN3900, which of the following slots can MQ1 be placed in?

A.

Slot5

B.

Slot6

C.

Slot9

D.

Slot26

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Question # 22

Which of the following operations need to be done before querying the bit error and optical power on the tube, otherwise the corresponding data cannot be queried?

A.

Create a logical fiber

B.

Configuration Data

C.

Enable NE performance monitoring time

D.

Synchronizing network metadata

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Question # 23

What kind of fault detection is used to trigger VPN FRR protection in PTN LTE?

A.

OAM

B.

BFD

C.

8O2.ae

D.

802.ba

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Question # 24

An OSN 9800 ring network is configured with ODUK ring network protection. Now a section of the optical cable on the ring needs to be reconstructed. In order to avoid frequent repetition of services during the reconstruction, which of

the following operations should be performed?

A.

Lock Switching

B.

Forced switching

C.

Manual switching

D.

to clear

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Question # 25

Which of the following is the service board type Y of MSTP equipment

A.

Interface board

B.

Service Processing Board

C.

Service processing board with interface

D.

Auxiliary board

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Question # 26

Which of the following statements about the FEU board is false?

A.

The FIU board does not process monitoring information

B.

The FIU can complete the access and release of the OSC channel

C.

Using ESC, OTM station needs a FIU

D.

Using OSC, both OLA station and OADM station need two FIUs

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Question # 27

Which of the following statements about the slave subrack SCC function is correct?

A.

Status management of boards from subracks

B.

DCN message forwarding

C.

Protection switching protocol processing of this subrack

D.

Handling of Overhead

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Question # 28

In the SDH system, we can use the instrument to test the input jitter tolerance of the STM-N interface. Which of the following instruments can complete this function?

A.

Smartbits

B.

SDH Analyzer

C.

Spectrum analyzer

D.

Bit Error Tester

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Question # 29

Which of the following descriptions are correct?

A.

CD1 can access and process 2 channelized STM-1 services

B.

L12 interface board can be installed in the slot of OpiX PTN 1900

C.

EFG2 can provide 2 GE electrical ports

D.

L12 can provide 16 E1 interfaces

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Question # 30

Which of the following 7900 single-board software function descriptions are correct?

A.

The software management module in the board is used to manage signaling protocols such as OSPF/1588V2

B.

The performance and alarm module is mainly used to check the alarm and performance of the single board, and report it to the main control board

C.

QoS, PwE3, L3VPN and other services are implemented by the service management module

D.

The basic framework of the single board provides basic system support, including memory management, process/thread management

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Question # 31

OSN6800 equipment, ND2, TQX report the BUS_ERROR alarm after configuring the power cross-connect, what are the possible reasons?

A.

The crossover board, TQX board or ND2 board is faulty

B.

The TQX client side business type is set incorrectly

C.

Subrack Hardware Limitations

D.

Cross bus capacity is limited

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Question # 32

In order to determine whether the optical fiber lines and connectors on the wavelength division side are normal, which of the following loopback methods is most suitable?

A.

Client-side outer loopback

B.

Client-side Inloop

C.

WDM side outer loopback

D.

WDM side inner loopback

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Question # 33

Which of the following factors is related to pointer adjustment?

A.

The clocks of each NE are not synchronized

B.

Rate

C.

Expenses

D.

Scrambling

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Question # 34

In order to quickly locate and eliminate the faults of optical network equipment in a timely manner, maintenance personnel are proficient in the basic operation of common transmission instruments. Which of the following instruments are

commonly used in optical network equipment maintenance?

A.

2M Bit Error Tester

B.

Optical Power Meter

C.

SDH Analyzer

D.

Light decay

E.

Multimeter

F.

Pigtail

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Question # 35

CAR is deployed on PTN equipment. Which of the following descriptions is wrong?

A.

CBS bursts are marked in yellow

B.

Supports setting the processing mode for CAR-processed packets

C.

The unit of CBS/PBS is Bytes

D.

The value of PIR is required to be greater than or equal to CIR

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Question # 36

In the current network, which of the following is the most common way of dividing VUNs?

A.

Port based division

B.

MAC-based division

C.

Based on Protocol Division

D.

IP Subnetting

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Question # 37

In the path hierarchy of the WDM network, which paths belong to the optical layer?

A.

OCH

B.

OTU

C.

OMS

D.

OTS

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Question # 38

The DCN red copper feature between network elements of PTN, which VLAN number is used by default for DCN self-communication between network elements.

A.

1024

B.

2048

C.

4094

D.

4096

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Question # 39

Create an ETH private line service in the PTN network, and connect an Ethernet tester to the UNI port for RFC2544 testing. The instrument shows that the current port has only sending traffic

and no receiving traffic. What are the possible reasons?

A.

The VLAN on the Ethernet tester is inconsistent with the service WLAN

B.

The remote UNI port of the test service on the PTN is not configured with inner loopback

C.

The instrument optical module does not match the equipment optical module

D.

The PTN side limits the service rate

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Question # 40

Which of the following statements about 100G coherent PDM-QPSK modulation is incorrect?

A.

The essence of QPSK modulation is to reduce the baud rate of the optical signal by half without reducing the line rate by selecting 4 possible values in the phase of the optical field.

B.

PDM-QPSK technology is the main modulation code technology for 100G transmission, which can reduce the line rate of 112Gb/s to the baud rate of 28Gbaud/s, greatly reducing the loan requirements for (optical)

electrical devices.

C.

PDM polarization multiplexing technology is adopted, which has better nonlinear tolerance than 40GePDM-BPSK.

D.

PDC-QPSK supports DCMfree and DCM system applications, and supports smooth upgrade from existing 10G/40G network to 100G system.

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Question # 41

The PWE3 technology in the PTN network often uses VLAN. Where is the VLAN in the Ethernet packet?

A.

Before SMAC and DMAC addresses

B.

Between SMAC and DMAC addresses

C.

After SMAC. and DMAC addresses

D.

not fixed

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Question # 42

When it is found that the local end reports the ETH_LOS alarm, the fault can be located by the switch-back method. If the alarm disappears after the ODF loops back to the local end, which of the following may be

the cause?

A.

The peer board or pigtail is faulty

B.

Line failure

C.

The local board or pigtail is faulty

D.

Device false positives

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Question # 43

Which of the following statements about the MPLS-TPOAM level is correct?

A.

Service is the service layer of PW, PW is the service layer of Tunnel, and Tunnel is the service layer of Section

B.

Section is the service layer of PW, PW is the service layer of Tunnel, and Tunnel is the service layer of Service

C.

Section is the service layer of Tunnel, Tunnel is the service layer of PW, PW is the service layer of Service

D.

Tunnel is the service layer of PW, PW is the service layer of Service, Service is the service layer of Section

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Question # 44

The 802.1Q tag header contains a two-byte TPID. Which of the following is its standard value?

A.

8100

B.

8847

C.

8147

D.

88A8

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Question # 45

When any of the following situations occurs, the ODUk_PM_DEG alarm will be reported on the NMS?

A.

When the number of errors in the PM segment of the ODU layer exceeds the limit, the number of errors exceeds the specified error threshold.

B.

When the PM segment of the ODU layer is degraded by bit errors, and the number of error codes exceeds the specified bit error degradation threshold

C.

The ODUkTCMng signal is degraded, and the number of bit errors exceeds the specified error threshold.

D.

The error error of the ODUkTCMn layer exceeds the limit, and the number of error errors exceeds the specified error degradation threshold.

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Question # 46

Which of the following combinations of dynamic optical add/drop multiplexing boards does not hold?

A.

WSD9+WSM9

B.

RDU9+RMU9

C.

WSD9+RMU9

D.

RDU9+WSM9

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Question # 47

MPLS is located between the data city road layer and the network layer in the TCP/IP protocol stack, and is used to provide services to the IP layer, and at the same time, it gets the business from the mallet road layer.

A.

True

B.

False

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Question # 48

When creating a static TUNNEL, you need to specify the interface of the next hop. Which is the displayed address of the next hop?

A.

NEIP

B.

NE LSR-IP

C.

Next-hop interface IP

D.

does not involve

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