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HSC - Transmission Question and Answers

HSC - Transmission

Last Update May 6, 2024
Total Questions : 326

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Questions 1

Which of the following descriptions of the electrical layer multiplexing and mapping steps of ODU0 is wrong?

Options:

A.  

After mapping and multiplexing, the 2 ODU0 signals can be finally multiplexed into 1 OTU1IV signal

B.  

After mapping and multiplexing of 8 ODU0 signals, it can be finally used as 1 OTU2V signal

C.  

After mapping and multiplexing, 34 channels of ODU0 signals can be finally multiplexed into 1 channel of OTU3V signals

D.  

After mapping and multiplexing, 80 channels of ODU0 signals are finally multiplexed into 1 channel of OTU4V

signals

Discussion 0
Questions 2

When the data link layer of a router (IP forwarding) receives a packet whose length is greater than the maximum MTU of the interface that the router will send out, which of the following strategies is adopted?

Options:

A.  

Drop the group

B.  

Fragment the packet

C.  

Make a request to the router to reduce its packet size

D.  

Forward the packet directly

Discussion 0
Questions 3

The multi-level connection monitoring mode (TCM) of OTN has three application forms. Which of the following is correct?

Options:

A.  

Cascading mode

B.  

Overlapping Mode

C.  

Nested Mode

D.  

Cascade Mode

Discussion 0
Questions 4

Which of the following items belong to the debugging work of the playback system?

Options:

A.  

Commissioning the protection function

B.  

Commissioning feature function

C.  

Debugging Errors

D.  

Optical power commissioning

E.  

Cabinet Installation

Discussion 0
Questions 5

Which of the following queue scheduling mechanisms can ensure the priority of the most urgent and critical services?

Options:

A.  

RFO

B.  

PQ

C.  

WFQ

D.  

BE

Discussion 0
Questions 6

What does the green PROG indicator on the PTN7900 board mean?

Options:

A.  

The board works normally

B.  

The service is active and the board is working

C.  

The board software is initialized successfully and the software runs normally

D.  

The business is working normally, and no business alarm is generated

Discussion 0
Questions 7

In the PTN equipment, what is the default TAG mark of the Ethernet port?

Options:

A.  

Tag Aware

B.  

Access

C.  

Hybrid

Discussion 0
Questions 8

Which of the following descriptions about bit errors in the SDH network is wrong?

Options:

A.  

B1, B2, B3 can only detect the even number of errors in a block, and the odd number of errors cannot be detected

B.  

B1, B2, B3 can only detect the odd number of errors in a block, and the even number of errors cannot be detected

C.  

Through B1, B2, B3, the bit errors of the regeneration section, multiplex section and high-order channel can be detected respectively

D.  

Bit error means that after receiving, judging, and regenerating, some bits in the digital code stream have errors.

Discussion 0
Questions 9

Which of the following signals is sent back to the sender by the receiver?

Options:

A.  

AIS

B.  

LCK

C.  

IAE

D.  

BDI

Discussion 0
Questions 10

Among the maintenance signals at the ODUk level, which of the following maintenance signals are included in the STAT bits of PM and TCM?

Options:

A.  

AIS

B.  

OCI

C.  

LCK

D.  

IAE

Discussion 0
Questions 11

Which of the following network element forms supports the functions of branch and line, cross-multiplexing between lines and lines, and service adding and dropping functions?

Options:

A.  

Terminal Multiplexer

B.  

Add/Drop Multiplexer

C.  

Regenerative Repeater

D.  

Digital cross-connect equipment

Discussion 0
Questions 12

When enabling NE performance monitoring events on the U2000 network management system, which of the following options are correct?

Options:

A.  

Set the monitoring start time of 15 minutes on the U2000 (must be later than the current time of the NMS and NEs)

B.  

Set the monitoring start time of 15 minutes on the U2000 (it can be earlier than the current time of the NMS and NEs)

C.  

15-minute monitoring end time (must be later than 15-minute monitoring start time), can not be set

D.  

15 minutes monitoring end time (must be later than 15 minutes monitoring start time), must be set

Discussion 0
Questions 13

Set up the alarm to report automatically, and report the alarm on the device side immediately after the alarm is generated. The alarm board pops up on the network management system. The user can view the alarm information in the alarm board, and does not need to

actively search for words. Unnecessary alarms can be set to not be automatically reported. At this time, the alarm will no longer be reported to the network, even if the synchronization operation is performed.

Options:

A.  

True

B.  

False

Discussion 0
Questions 14

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

Options:

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

Discussion 0
Questions 15

100mw is roughly equal to how many dBm?

Options:

A.  

13dBm

B.  

15dBm

C.  

20dBm

D.  

10dBm

Discussion 0
Questions 16

In which slots are the OptiX OSN 8800 T32 cross-connect boards fixed?

Options:

A.  

8

B.  

9

C.  

10

D.  

11

Discussion 0
Questions 17

Which of the following logical function blocks is used for multiplexing section switching?

Options:

A.  

MST

B.  

MSP

C.  

SPI

D.  

MSA

Discussion 0
Questions 18

DCM optical power debugging requires the input of DCM to be no greater than which of the following values?

Options:

A.  

-2

B.  

-3

C.  

-4

D.  

-5

Translated from Chinese (Simplified) to English - www.onlinedoctranslator.com

Discussion 0
Questions 19

What types of reports are generated by the Inspector inspection tool?

Options:

A.  

Client Official Report

B.  

External reporting

C.  

Engineer's Report

D.  

Internal Reporting

Discussion 0
Questions 20

In the VPLS service, which parameter is the data forwarding based on?

Options:

A.  

Destination IP

B.  

Source IP

C.  

Destination MA

C.  

D.  

Source MAC

Discussion 0
Questions 21

In the PTNLTE solution, which source interface is used when deploying multi-hop daily BFD at the core L3 nodes in the prefecture and city?

Options:

A.  

L3VE sub-interface

B.  

Link Aggregation Port

C.  

LOOPBACK port

D.  

City L3 node interconnection interface

Discussion 0
Questions 22

Regarding PW labels and tunnel labels, which of the following statements are correct?

Options:

A.  

PW labels are mainly used to distinguish PWs, but for CES services, because CES services do not support aggregation, there is no need to use PW labels

B.  

Tunnel label is mainly used for transmission in the tunnel, it mainly uses the tunnel label to establish MPLS tunnel

C.  

They are all based on MPLs tags

D.  

PW signing only needs negotiation between the source and sink network elements, and has nothing to do with the intermediate

tansit network elements

Discussion 0
Questions 23

In the OSN6800 subrack, when the OTU is inserted in the 17th slot, electrical layer scheduling can be realized

Options:

A.  

True

B.  

False

Discussion 0
Questions 24

After a certain distance transmission in the wavelength division system, the optical signal-to-noise ratio of the signal at the receiving end will decrease to a certain extent. The main reason is which of the following?

Options:

A.  

Use of EDFA

B.  

Use of demultiplexer

C.  

No new fiber is used

D.  

Fiber attenuation is too large

Discussion 0
Questions 25

In the WDM transmission system, the main factors that affect the unevenness of the power balance of each channel do not include the following?

Options:

A.  

Inhomogeneity of insertion loss of each channel of the combiner/demultiplexer

B.  

The main channel adjustable optical attenuator setting is unreasonable

C.  

EDFA gain unevenness

D.  

The cable attenuation is too high

Discussion 0
Questions 26

In which layer of overhead is the segment monitoring overhead SM located?

Options:

A.  

OPDK

B.  

ODUK

C.  

OTUK

D.  

OMS

Discussion 0
Questions 27

Which of the following is a common wavelength in optical communication?

Options:

A.  

850nm.1310nm.1500nm

B.  

850nm, 1310nm.1550nm

C.  

850nm, 1330nm, 1550nm

D.  

800nm, 1310nm, 1550nm

Discussion 0
Questions 28

Which of the following services can be processed by MP1 processing board?

Options:

A.  

ML-PPP

B.  

Ethernet

C.  

CES E1

D.  

IMA E1

Discussion 0
Questions 29

In the PTN network, how many CES services can a PW carry at most?

Options:

A.  

Article 1

B.  

Article 2

C.  

Article 5

D.  

innumerable

Discussion 0
Questions 30

PTN can support in-band DCN. At this time, the port needs to enable the DCN function. Therefore, in CES service, PTN setup cannot be managed by in-band

DCN.

Options:

A.  

True

B.  

False

Discussion 0
Questions 31

Which of the following Ethernet port alarms is not a physical layer alarm, that is, LSR_NO_HTED has no correlation with it, and there is no suppression relationship?

Options:

A.  

ETH_LOS

B.  

LASER_MOD_ERR

C.  

LASER SHUT

D.  

ETHJJNK_DOWN

Discussion 0
Questions 32

In Optix PTN, what kind of MPLS Tunnel APS protection is supported?

Options:

A.  

1+1 single-ended protection

B.  

1+1 double-ended protection

C.  

1:1 single-ended protection

D.  

1:1 double-ended protection

Discussion 0
Questions 33

Which of the following technologies is used in the dynamic BGP MPLS L3VPN to distinguish the same IP address in different VPNs in the BGP protocol?

Options:

A.  

VRF

B.  

RD

C.  

Export RT

D.  

Import RT

Discussion 0
Questions 34

IEEE 802.1Q defines the structure of VLAN tags, including TPID, PRI, CR, and VLAN ID. Which of the following is used to classify service

priorities?

Options:

A.  

VLAN ID

B.  

CR

C.  

PRI

D.  

TPID

Discussion 0
Questions 35

When using OptiX Datacollector to collect data, it can be collected by network element, which means to collect the fault data of all boards below the network element, or it can be collected by single board to collect

the fault data of a single board under the network element.

Options:

A.  

True

B.  

False

Discussion 0
Questions 36

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

Options:

A.  

Direct modulation light source

B.  

Light source of EA modulation method

C.  

MZ modulation light source

D.  

Coherent reception modulation mode light source

Discussion 0
Questions 37

The L3VPN routing of the PTN LTE network includes user-side routing and network-side routing. What are the items based on which VPN routing forwarding table is finally generated?

Options:

A.  

User-side routing needs to be manually configured by the administrator

B.  

The PTN6900 at the core layer needs to be configured as a VPN peer relationship

C.  

Use the U2000 and the configured user-side routes to automatically calculate and generate network-side routes

D.  

Use MP-BGP to propagate user-side

routes

Discussion 0
Questions 38

Which items belong to the optical layer path in the path hierarchy of the WDM network?

Options:

A.  

OTS

B.  

OMS

C.  

OCH

D.  

OTU

Discussion 0
Questions 39

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?

Options:

A.  

WDM side inner loopback

B.  

WDM side outer loopback

C.  

Client side loopback

D.  

Client side outer loopback

Discussion 0
Questions 40

Which of the following is not included in the function of the Inspector inspection tool?

Options:

A.  

Perform inspection tasks from the batch of relevant information obtained from NEs

B.  

Collect network element performance data for inspection

C.  

Support viewing inspection results and importing and exporting inspection data.

D.  

Generate an inspection report according to the passing of inspection items and analyze the situation.

Discussion 0
Questions 41

During device initialization and commissioning, which of the following configuration descriptions is incorrect?

Options:

A.  

The snmp parameter of the network element needs to be the same as the configuration of the network management

B.  

The DCN route of the NE needs to be associated with the VPN instance "_dcn_vpn-"

C.  

NE management can only use GE0/0/0 interface

D.  

The default network management 0SPF process number is 65534

Discussion 0
Questions 42

The EDFA erbium-doped fiber amplifier is a key component of the new generation of optical fiber systems. Which of the following options are correct for the description of its advantages?

Options:

A.  

High gain

B.  

High output power

C.  

The working wavelength is consistent with the minimum attenuation window of single-mode fiber

D.  

Low noise figure

E.  

Gain Flattening

Discussion 0
Questions 43

Which of the following response modes is usually used when diagnosing unidirectional tunnel connectivity in a PTN network?

Options:

A.  

No response

B.  

IPV4/UDP reply

C.  

Application Control Channel

D.  

TCP channel

Discussion 0
Questions 44

In the MPLS-TPOAM architecture of PTN equipment, what are the functions of network performance maintenance?

Options:

A.  

LB

B.  

LM

C.  

LT

D.  

DM

Discussion 0
Questions 45

Through the northbound interface, the U2000 can flexibly connect with different third-party network management systems, providing physical storage and reporting data information for the upper-layer network.

Options:

A.  

True

B.  

False

Discussion 0
Questions 46

Which of the following statements about the internal port attributes of an Ethernet board is incorrect?

Options:

A.  

For the ingress port of the Tag Aware attribute: if the input data has a VLAN ID, the received data will be transparently transmitted

B.  

For the ingress port of the Tag Aware attribute: if the input data does not have a VLAN ID, discard it

C.  

For the ingress port of the Access attribute: if the input data does not have a VLAN ID, it will be transparently transmitted directly

D.  

Ingress to the Access attribute: if the input data has a VLAN ID, discard the

Discussion 0
Questions 47

One LSPTunnel can only carry one PW

Options:

A.  

True

B.  

False

Discussion 0
Questions 48

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

Options:

A.  

CHAN_LOS

B.  

R_LOS

C.  

MUT_LOS

D.  

OSC_LOS

Discussion 0