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H31-311 Sample Questions Answers

Questions 4

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.

Options:

A.

TRUE

B.

FALSE

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Questions 5

An unprotected chain consists of four NEs: NE1, NE2, NE3, and NE4. An end-to-end VC4 trail NE1—NE4 is created, and NE5 is added between NE2 and NE3 for capacity expansion. The original configuration remains unchanged, and no service is configured on NE5. In this case, the unprotected chain becomes NE1-NE2-NE5-NE3-NE4, and how many VC4 trails can be searched out?

Options:

A.

0

B.

1

C.

2

D.

3

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Questions 6

In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and usage information of clock sources?

Options:

A.

G1

B.

S1

C.

N1

D.

M1

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Questions 7

Which of the following statements about extended ECC is incorrect?

Options:

A.

Extended ECC is classified into automatic extended ECC and extended ECC in specified mode.

B.

Automatic extended ECC indicates using a straight-through cable to connect the Ethernet ports of two NEs.

C.

Extended ECC in specified mode indicates that the server and client need to be specified.

D.

Automatic extended ECC can be enabled on a maximum of four NEs. In manual extended ECC mode, each server can be connected to a maximum of three clients.

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Questions 8

The standard Ethernet frame length should not be less than 64 bytes. Which of the following factors cause this limitation? (Multiple Choice)

Options:

A.

Minimum transmission distance

B.

Maximum transmission distance

C.

Working mechanism of conflict detection

D.

MAC address

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Questions 9

In the 2.5G MSP ring consisting of four MSTP sites, when a protection switching occurs, which of the following statements about the alarm reporting is correct?

Options:

A.

The PS alarm is reported on the tributary board.

B.

The APS-INDI alarm is reported on the XCS board.

C.

The APS-INDI alarm is reported on the system control board.

D.

The APS-INDI alarm is reported on the line board.

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Questions 10

The device IP addresses of the gateway NE and non-gateway NEs must be set in the same network segment.

Options:

A.

TRUE

B.

FALSE

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Questions 11

Which of the following operating systems support the installation of the U2000 client?

Options:

A.

Windows

B.

Solaris

C.

SUSE Linux

D.

All of the above

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Questions 12

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.

Options:

A.

TRUE

B.

FALSE

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Questions 13

After an optical fiber is connected according to the networking diagram, if a critical alarm is reported on the optical port, the SRV indicator on the line board is red.

Options:

A.

TRUE

B.

FALSE

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Questions 14

The fiber core refractive index n1 must be ( ) the cladding layer refractive index n2, which is a necessary condition for transmitting optical signals in optical fibers.

Options:

A.

higher than

B.

lower than

C.

equal to

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Questions 15

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

Options:

A.

G.694

B.

G.652

C.

G.975

D.

G.709

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Questions 16

Which of the following is the functional unit that provides the interfaces related to the orderwire phone and serial data for the system?

Options:

A.

Auxiliary unit

B.

Line unit

C.

Tributary unit

D.

Cross-connect unit

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Questions 17

Which of the following can be configured as the monitoring time of NE performance events?

Options:

A.

Later than the current time

B.

Same as the current time of the NE

C.

Earlier than the current time

D.

Any time

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Questions 18

Which of the following factors determines that the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent After signals are transmitted for a certain distance in a WDM system, the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent. Which of the following is the main cause?

Options:

A.

EDFAs are used.

B.

Multiplexers and demultiplexers are used.

C.

New types of optical fibers are not used.

D.

Fiber attenuation is excessively high.

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Questions 19

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

Options:

A.

OCH

B.

OMS

C.

OTS

D.

OSC

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Questions 20

The SNCP switching speed can be improved if you classify the SNCP services that have the same source, sink, or route into groups.

Options:

A.

TRUE

B.

FALSE

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Questions 21

The value of the MFAS byte increases with the sequence number of the OTUk/ODUk base frame, and a maximum of ( ) base frames are included.

Options:

A.

64

B.

128

C.

256

D.

512

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Questions 22

Which of the following alarm/event dumping modes are supported by the U2000? (Multiple Choice)

Options:

A.

Manual dumping

B.

Automatic dumping

C.

Overflow dumping

D.

Periodic dumping of alarm logs

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Questions 23

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

Options:

A.

0.000000001

B.

0.00001

C.

0.001

D.

0.01

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Questions 24

Manual configuration will clear data on the NE side.

Options:

A.

TRUE

B.

FALSE

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Questions 25

Outband networking requires higher costs than inband networking, but provides more reliable management channels.

Options:

A.

TRUE

B.

FALSE

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Questions 26

TU-AIS is frequently encountered during network maintenance. Which of the following alarms can trigger the TU-AIS alarm? (Multiple Choice)

Options:

A.

AU-LOP

B.

R-LOS

C.

HP-TIM

D.

B2-EXC

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Questions 27

When a VLAN-based service type is configured, which of the following functions must be enabled on the port?

Options:

A.

Auto-negotiation mode

B.

Flow control

C.

Entry detection

D.

Broadcast packet suppression

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Status:
Expired , and Replaced By
Exam Code: H31-311
Exam Name: HCIA-Transmission V2.0
Last Update: Apr 14, 2023
Questions: 186
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