HCIP-Video Conference V2.0 H11-861_V2.0 Sample Questions

Jonnie Karnath2023-05-29T07:23:58+00:00

Are you preparing for the HCIP-Video Conference V2.0 H11-861_V2.0 certification exam? Certspots offers a wide range of HCIP-Video Conference V2.0 H11-861_V2.0 sample questions to help you prepare for the exam. Each question is designed to test your theoretical knowledge and practical skills, providing a comprehensive assessment of your readiness for the HCIP-Video Conference V2.0 exam. By practicing these HCIP-Video Conference V2.0 H11-861_V2.0 sample questions, you can get a better understanding of the exam format and improve your chances of passing the HCIP-Video Conference V2.0 H11-861_V2.0 certification exam.

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1. Network recording service During the meeting, in addition to recording the content of the meeting, you can also watch it through the live client.

TRUE

FALSE

2. T.140 subtitles support SIP and H.323 terminals to send and receive subtitles.

TRUE

FALSE

3. The illuminance is based on the luminous flux received by the vertical plane. If it is irradiated obliquely, the illuminance will decrease.

TRUE

FALSE

4. Request/response messages on reliable transport are not retransmitted.

TRUE

FALSE

5. Remote audio loopback, from audio input, encoding, transmission to the remote end through the network and then forwarding back, mainly to test whether the network connection is normal.

TRUE

FALSE

6. In multimedia services, RTP is used for real-time data message transmission, and RTCP is used to detect the service quality of RTP sessions.

TRUE

FALSE

7. For the SDP protocol, line c contains information on the connection established for the multimedia session, which indicates the IP address used by the actual media stream.

TRUE

FALSE

8. During the terminal registration GK stage, which of the following information is included in the UDP Header in the RRQ registration request message? (Multiple choice)

Caller Number

Caller CS addr

Caller RAS addr

GK RAS addr

9. The sound in the room reaches a stable state during the reverberation time. After the sound stops sounding, the residual sound is repeatedly absorbed by the sound-absorbing material in the room, represented by T60.

TRUE

FALSE

10. As shown in the figure, the terminal's ( ) operation can take pictures of the remote site.

Video Control

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11. () test can display 7 color bars on the screen to detect the effect of the picture output.

Color

12. Banners are used to briefly display the content of the meeting, and subtitles are used to highlight the theme of the meeting.

TRUE

FALSE

13. Wireshark can support decoding of many protocols, such as () (Multiple choice).

263

RTP

TCP

14. The usage rule of cascading channels is to occupy by priority, and resources are mutually exclusive at the same priority.

TRUE

FALSE

15. CANCEL transactions can be used for both CANCEL INVITE transactions and CANCEL non-INVITE transactions.

TRUE

FALSE

16. Multicast, is a network technology that allows one or more senders (multicast sources) to send a single data packet to a receiver (once, simultaneously).

TRUE

FALSE

17. The area management is realized by which of the following system modules?

SMC

MCU

HD terminal

18. Color temperature is the most common indicator of the spectral quality of a light source, and the unit is Lux (lx).

TRUE

FALSE

19. In the web page of the MCU, what is the format of the exported address book information?

.vcf

.xml

.dat

.cap

20. In the design of the conference room, it is necessary to avoid the direct illumination of the top light and metering from the top or outside the window, which will directly cause influence.

TRUE

FALSE

Page 3 of 14

21. In the RTP message, the initial value of the Sequence number is random. If no RTP data packet is sent, the sequence number is incremented. The receiving end detects packet loss and reconstructs packets based on it.

TRUE

FALSE

22. The role of RTP in VoIP mainly includes: real-time transmission of media information, elimination of jitter, badges, prevention of packet loss, and transmission of DTMF signals, tones and signaling.

TRUE

FALSE

23. In the H.323 call flow, the MCU is responsible for recording the registered address of the terminal.

TRUE

FALSE

24. Which of the following is not one of the six main request messages of the SIP protocol?

ACK

CANCEL

SETUP

BYE

25. The stretching mode is full-screen stretching according to the output ratio, and part of the image will be captured.

TRUE

FALSE

26. Which of the following descriptions of SIP registration is wrong?

When the address of the SIP Client changes, it needs to re-register

The registration information must be refreshed regularly, usually Register saves the registration information to the Location Server

Users need to register with the server every time they boot up

The function is to bind the AOR address to a Contact address, so that the Proxy can find the calling address when making a call.

27. At the end of the meeting, the recording server will return the recording address to the SMC, and the SMC email will notify the user to watch on demand.

TRUE

FALSE

28. INVITE transactions are retransmitted at () time intervals by default.

500ms, 1s, 2s, 4s, 4s, 4s

500ms, 1s, 2s, 4s, 8s, 16s

500ms, 1s, 2s, 4s, 8s, 8s

500ms, 1s, 2s, 4s, 16s, 16s

29. The network recording and broadcasting does not occupy any resources of the MCU, and does not interfere with the running status of the video conference.

TRUE

FALSE

30. When scheduling a meeting, it prompts "Insufficient IP port resources", but check that the MCU is online and the number of 1P ports is sufficient. The possible reason for the error is? (Multiple choice)

Insufficient license resources

MCU is not registered to GK

There is no corresponding MCU in the service area

The site protocol and rate are inconsistent

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31. Direct sound refers to the sound signal that reaches the listener directly from the sound source. The meeting requires that the direct sound be the main one.

TRUE

FALSE

32. What is the main function of the H.245 protocol? (Multiple choice)

Real-time transmission

Capacity Negotiation

Video encoding

Media Control

33. () frame does not have complete picture data, only the data that is different from the picture of the previous frame.

34. Regarding the HD terminal auxiliary IP, which of the following statements is wrong?

You can enter the terminal through this IP

Can be left blank

Used for terminal debugging in LAN

For main business

35. H.460.19 specifies the public-private network traversal process of H.323 call control signaling.

TRUE

FALSE

36. Color temperature is defined according to the absolute black body. When the radiation of the light source is exactly the same as the radiation of the absolute black body in the visible area, the Kelvin temperature of the black body at this time is called the color temperature of the light source.

TRUE

FALSE

37. The flexible extension mechanism of the SIP protocol refers to adding header fields and adding message types.

TRUE

FALSE

38. The bandwidth limitation of the network segment may cause the terminal to fail to register with the GK.

TRUE

FALSE

39. What are the main ways of NAT mapping? (Multiple choice)

Static address mapping

Port Mapping

Protocol Mapping

Dynamic Address Mapping

40. The Huawei NLOG software is part of the conference scheduling and management software, and is installed and used together with the SMC conference management software.

TRUE

FALSE

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41. The large amount of data and the existence of data redundancy in sound signals are the basis for digital audio to need () encoding.

RTCP

42. Peer-to-peer network, diagnosis in the case of networking without public and private network traversal.

TRUE

FALSE

43. Wireshark is a network packet analysis tool. Its main function is to capture network packets in real time on the interface and display detailed protocol information of the packets in detail.

TRUE

FALSE

44. Loudness indicates the strength of the sound, and which can determine the loudness?

The material of the sounding body

Sound intensity

Amplitude of sound waves

sound frequency

45. A transaction can only be identified by a unique branch.

TRUE

FALSE

46. Which of the following functions does the gatekeeper provide? (Multiple choice)

Address translation

Access Control

Bandwidth Control

Conference Control

47. In the SIP structured hierarchical relationship, the request message mainly includes () (Multiple choice)

Four header fields

Return message body

Non-INVITE transactions

Back to the request line

48. Wireshark can not only monitor the network, but also process network data.

TRUE

FALSE

49. Enable SEC, the system can automatically adjust the network transmission and video and audio processing for the rich QOS mode of the IP network. After SEC is enabled, the anti-packet loss capability is greatly improved.

TRUE

FALSE

50. When DVI output, 9039S and 9039A can support 1080P 60fps main and auxiliary stream input resolution, what resolution can the auxiliary stream reach at this time?

1080P

7201

10801

720P

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51. Background lighting improves monotonous backgrounds; background lighting should be dimmer than the key light to accentuate images of people and create a sense of depth.

TRUE

FALSE

52. The master/slave switchover of GK is coordinated by the heartbeat connection.

TRUE

FALSE

53. MSDA is a master-slave decision response message, and the Master or Slave flag carried in it refers to the state of the local end.

TRUE

FALSE

54. The gatekeeper sends an address resolution request to other gatekeepers. Which signaling can realize this function?

LRQ

URQ

RRQ

GRQ

55. Which of the following messages is not a status query message?

IRQ

RRQ

IACK

IRR

56. The color difference (YPbPr) output supports both 16:9 and 4:3 output.

TRUE

FALSE

57. The data of NLOG V2 comes from ( )

SMC

Terminal

MCU

58. The MCU encodes the images of each terminal that needs to be added to the multi-screen combination, and then combines them into one image and transmits it to all terminals viewing the multi-screen.

TRUE

FALSE

59. All MCU under the same service area must have the same prefix number.

TRUE

FALSE

60. People convert the corresponding mechanical vibration of sound into electrical signals, which are collectively referred to as audio signals.

TRUE

FALSE

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61. Please correspond the I/P/B frame to its characteristics one by one

62. Wireshaik can capture packets of many types of network interfaces, except wireless local area network interfaces.

TRUE

FALSE

63. For the SDP protocol, the m line is also called the media line, which describes the information such as the media type supported by the sender, and the second parameter is?

Transmission Protocol

Media name

Number of four payload types supported

Port number

64. The figure shows an example of the () message in the RTCP protocol.

RTP

65. When the MCU is in the wall-mounting mode, ( ) needs to be registered on the GK.

GE1 port

Either GE1 or GE0 can

FED

GE0 port

66. Reduction of reverberation time can be achieved by covering walls, ceilings, windows and floors with soft furnishing materials.

TRUE

FALSE

67. Which of the following descriptions about H.323 call flow is correct? (Multiple choice)

RAS, RTP/RTCP are carried on the UDP protocol layer

931 common port: 1719

AS common port: 1720

931 and

245 are carried on the TCP protocol layer

68. When using the MCU wall-mounting mode, it is necessary to modify the firewall in the original network (such as open ports).

TRUE

FALSE

69. In the H.323 protocol, it is finally represented by the number 3 is?

Network based on B-ISDN

Based on a network with guaranteed quality of service

Networks based on Packet Transport Protocol

GSTN and Wireless-Based Networks

70. The sampling method mainly used in video communication at present: 4:2:0 sampling method.

TRUE

FALSE

Page 8 of 14

71. In the Contirmed state, both the calling and the called can terminate the Dialog through ByE.

TRUE

FALSE

72. Which of the following descriptions of the advantages and disadvantages of forward error correction FEC are correct? (Multiple choice)

It has high requirements on latency and is difficult to use on existing networks; it is only effective for small packet loss scenarios; it aggravates image jitter.

Basically does not occupy bandwidth resources, and has little impact on image quality

Muscle-increasing redundant data occupies a certain bandwidth and reduces the video effect; there is no solution for sudden packet loss; a certain delay is introduced.

Through the verification method of packet combination, packet loss data with a certain probability can be recovered, which is more effective for general packet loss scenarios.

73. Ways to improve building acoustics include? (Multiple choice)

Low reverberation time

Low background noise

Low corridor noise

Low controllable noise

74. 1080P or 720P 50/60fps is 50 frames per second or 60 frames per second progressive full image instead of 50/60 field interlaced image.

TRUE

FALSE

75. The master-slave decision is mainly used to prevent both parties from triggering the same unshared event or resource at the same time during the communication process, so a master party needs to be determined in advance. When a conflict occurs, the slave should act according to the decision of the master.

TRUE

FALSE

76. In the Cseq header field, Cseq is used to uniquely identify an invitation or a registration.

TRUE

FALSE

77. In a video conference, it is required that the noise in the empty field is not greater than ()

36dB

38dB

40dB

34dB

78. Static NAT converts private network addresses into Internet addresses, and it is many-to-many. It does not guarantee that a private network address will be converted into a public network address.

TRUE

FALSE

79. The color rendering index refers to the measure of the degree of color conformity of an object when illuminated by this light source and by a standard light source. The smaller the value, the higher the conformity degree.

TRUE

FALSE

80. The frequency response capability of nature that the human ear can perceive can reach 20Hz-20KHz. Using G.711, G.722, G.728 and other audio standards, the audio width is only 50Hz-7KHz, so in the process of high-definition video communication The AAL-LD method is used to solve this problem.

TRUE

FALSE

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81. How often does the terminal report the packet loss rate to the MCU by default?

20S

15S

82. The difference between the A. d Hoc conference and the traditional video conference system is that a conference can be created and joined on the terminal side without an administrator.

TRUE

FALSE

83. The private network terminal does not enable NAT, and the public network terminal fails to call the private network terminal inside the firewall. What is the root cause?

The RRQ registration information of the private network terminal cannot be obtained

The source port of the private network terminal cannot be found

The destination address of the Setup message is the private network address, so the CS address comes from the internal data of the RRQ message packet of the private network terminal and will not be changed with NAT

Callee cs addr error in ACF reported by GK

84. The address translation function of the gatekeeper refers to converting the site name or number into an IP address according to the data table at the time of node registration.

TRUE

FALSE

85. The auxiliary stream can be a moving image or the content of the computer desktop.

TRUE

FALSE

86. As shown in the figure, through the conference information of the SMC, it can be known that the conference site adopts the audio encoded by the ( ) protocol to conduct a dialogue.

AAC-LD

87. Which of the following processes will the standby GK complete in response to a synchronization request? (Multiple choice)

Check whether the system data status is valid for the master

Start the sync task process (lowest priority)

Timing 1 second to check whether the synchronization is over

The task is suspended for 1ms

88. Huawei's video product fault location methods can be summarized as follows: food and grass first, follow the vines, step by step, bold and careful, and pass on the fire from generation to generation.

TRUE

FALSE

89. In which protocol layer does NAT mainly work?

Data link layer

Application layer

Network layer

Transport layer

90. H.323 can only be used on IP networks.

TRUE

FALSE

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91. In H.460 networking, the RTP keep-alive code stream is?

Sent from the private network terminal to the public network terminal

The data sent by the public network terminal to the private network terminal

Sent by private network terminal to Ts

Sent by the public network terminal to Ts

92. The protocol that can implement video codec is?

225

239

245

261

93. Regarding the Client proxy in the H.460 protocol, which of the following descriptions is correct? (Multiple choice)

Client proxy follows

460 communication protocol.

Client proxy follows the standard

323 communication protocol.

Client proxy functions include ClientGK,

460.18 Client and

460.19 Client

Terminals that do not support the

460 protocol can use the standard

323 protocol to communicate with the Client proxy.

94. When a terminal/MCU uses a number to call, which of the following is not included in the ARQ call information?

Callee CS addr

Caller CS addr

Caller Number

Callee Number

95. Which of the following descriptions of the advantages and disadvantages of ARQ for packet loss and retransmission is correct? (Multiple choice)

It has high requirements for delay and is difficult to use on the existing network; it is only effective for small packet loss scenarios; it aggravates image jitter.

Basically does not occupy bandwidth resources, and has little impact on image quality

Muscle-increasing redundant data occupies a certain bandwidth and reduces the video effect; there is no solution for sudden packet loss; a certain delay is introduced.

Through the verification method of packet combination, packet loss data with a certain probability can be recovered, which is more effective for general packet loss scenarios.

96. The function of the registration server is to map the address in the request to zero or more new addresses, and then return it to the client.

TRUE

FALSE

97. Forward error correction (FEC), when the two parties establish a call and detect that the media stream packet loss exceeds 0.1% within 10s, the super error correction function will be enabled, and the super borrow correction function will divide a part of the call bandwidth. It is used to transmit redundant code streams that are resistant to packet loss.

TRUE

FALSE

98. The color rendering index affects the restoration of the image. When the color rendering index is low, the color of the image will deviate greatly from the original image.

TRUE

FALSE

99. The H.323 system adopts the H.245 protocol as the control protocol for controlling the communication channel () (Multiple choice)

to establish

Bandwidth Limitations c. release

Maintenance

100. When the private network terminal calls the public network terminal, when the logical channel is opened, what is the reason for the single pass of the media stream?

The firewall does not open the corresponding port

The public network terminal cannot find the private network address

The terminal cannot perform master-slave determination

The terminal cannot perform capability negotiation

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101. Please correspond the following terminal conference parameters and their samples one by one:

102. Any SIP message consists of a start line, a header field and a message body. The header field must end with CFLF (carriage return line feed).

TRUE

FALSE

103. In the Early state, you can use () to terminate the Dialog. (Multiple choice)

The caller sends BYE

The caller sends CANCEL

Callee's Failed Reply

The called party sends BYE

104. RTCP can ensure the transmission quality through RR, and each participant receiving data must send RR.

TRUE

FALSE

105. As shown in the figure, configure the "()" parameter of the recording server to remind the user to deal with it in time when the recording space is insufficient.

Recording space threshold (%)

106. 1. The SR message in TCP is a sending report, which describes the sending and receiving statistics of the sending gateway.

TRUE

FALSE

107. The requirement of the video conference for the light source is that the color rendering index is greater than ( ).

150

100

108. Dynamic dual streams can support simultaneous transmission () of independent video images to the far end.

109. A. d Hoc conference is an instant conference. Users can create a conference and join a conference on the terminal side, and there are video and audio prompts during the operation.

TRUE

FALSE

110. When using the MCU wall riding mode, there is no need to add other devices for traversing the public and private networks.

TRUE

FALSE

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111. Among the six basic request messages, () is used to end the conversation.

CANCEL

BYE

INVITE

ACK

112. More than 20% of the information that humans obtain from the outside world comes from hearing. The sound that the human ear can perceive is a kind of mechanical vibration wave. What is the frequency of the sound wave?

50-20000

30-20000

20-20000

20-40000

113. Among the four elements of packet filtering by the firewall, the conditions that can generally be omitted are?

Destination port

Source Port

Destination address

Source address

114. The packet loss rate recorded by NLOG does not include packet loss of data equipment on the line.

TRUE

FALSE

115. Under the videoconferencing business, it is impossible to call the private network from the public network and can be converted into a private network to call the public network. What is the general public-private network traversal technology used? (Multiple choice)

Static NAT

SNPs

ALG

460

116. The video signal starts from the input terminal equipment, encodes and compresses it and sends it to the network, and finally displays it. It has undergone many images processing links in the middle, mainly including: IP camera, preprocessing, compression encoding, data encapsulation and transmission, decoding, Image format changes, playback.

TRUE

FALSE

117. The design purpose of the terminal auxiliary IP is to allow users to log in the terminal to configure or debug in the local area network, which can be used for the main business.

TRUE

FALSE

118. In the RTP message, Timestamp reflects the sampling instant of the first bit in the RIP data packet. The sampling instant accuracy must meet the synchronization requirements for synchronization and jitter calculations. The initial value of the time stamp is random, and then increases according to the size of the packet data.

TRUE

FALSE

119. The method for adjusting the horizontal included angle includes: when the screen width is fixed, adjusting the seat; adjusting the screen width can change the horizontal included angle.

TRUE

FALSE

120. Capability exchange information includes? (Multiple choice)

TCS

TCSA

TCSR

IRR

Page 13 of 14

121. The H.460 protocol specifies that the H.323 signaling part of the public and private network traversal processing is?

460.18

460.19

460.20

460.21

122. Users can enter the conference hall by calling the IP address of the MCU, and create a video IVR conference according to the IVR prompt.

TRUE

FALSE

123. The basic functions of the firewall include: content filtering, user authentication, VPN, application proxy, NAT, packet filtering & state detection, IDs and alarms, logs, etc.

TRUE

FALSE

124. In the multi-channel cascade feature, the maximum number of cascade channels between two MCUs in the same conference is 32 channels.

TRUE

FALSE

125. During the point-to-point number call process, the called terminal will only send a call request to the GK after receiving the setup signaling.

TRUE

FALSE

126. Which of the following descriptions about MiniMCU cascading characteristics is correct? (Multiple choice)

The MiniMCU terminal supports up to three levels of cascading conferences

Support the main MiniMCU for conference control in cascaded conferences

Support

323 cascading port calls in cascading conferences

Support each terminal site in the cascading conference to join the conference in the form of SIP and

323 calls

127. The key point of the signaling packet analysis idea is to be familiar with the signaling process. When problems are found, focus on which signaling packets should be in the signaling process, filter irrelevant data, and capture packets that should not be caught.

TRUE

FALSE

128. The extension request message UPDATE is used to modify the session attributes during the call establishment phase.

TRUE

FALSE

129. The RAS message is a kind of message specified by the H.225.0 protocol. It is a protocol used between nodes and gateways to perform management functions, mainly including registration, access control, and status.

TRUE

FALSE

130. The alarm light on the MCU main control board is red, and the message "Insufficient license resources" is displayed when scheduling a conference. The possible reason is that the license of the MCU does not match the actual hardware configuration of the MCU.

TRUE

FALSE

Page 14 of 14

131. Where the illumination is not enough, the image noise is less, and the image is dark.

TRUE

FALSE

132. In the RTP specification (RFC 3550), a total of () is defined in the RTCP report to report the current control information

133. H.460 signaling interworking scheme ().

The public network terminal adopts

460 protocol communication

Private network terminal uses

460 protocol to communicate

Both public and private network terminals use the standard

323 protocol to communicate

The above statement is wrong

134. What might be the case when the GK side hangs up the call? (Multiple choice)

Billing failure

Failed to negotiate port capability

IRR timeout due to network reasons

The interface hangs up

135. The dialog is uniquely identified by Call-ID, From Tag, To Tag, which can be modified after establishment.

TRUE

FALSE

136. The call access control function of GK mainly refers to judging whether a node is allowed to initiate a call according to user rights, network bandwidth and other conditions.

TRUE

FALSE

137. Which of the following descriptions of the advantages and disadvantages of forward error correction (FEC) are correct? (Multiple choice)

It has high requirements for delay and is difficult to use on the existing network; it is only effective for small packet loss scenarios; it aggravates image jitter

Basically does not occupy bandwidth resources, and has little impact on image quality

Added redundant data, occupies a certain bandwidth, and reduces the video effect; there is no solution for sudden packet loss; a certain delay is introduced

The packet loss data with a certain probability can be recovered by the method of packet combination verification, which is more effective for general packet loss scenarios

138. HD terminals support point-to-point () calls. (Multiple choice)

Number

Venue name

MAC address

IP address

139. The voice enhancement technology Jitter Buffer uses a signal wave of human intervention to eliminate the echo signal generated during the communication process, while retaining other normal voice signals to achieve the normal use of communication.

TRUE

FALSE

140. What parts must a transaction contain? (Multiple choice)

ACK

Zero or more provisional responses

A final response

A request message

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