New H11-879_V2.0-ENU Dumps – Valid Materials to Help You Pass HCIE-Collaboration (Written) V2.0 Exam

1. Two interconnected Huawei VP terminals A and B communicate through a conference scheduled by Huawei 8650+SMC. A uses the T.140 protocol to send a banner to B. The color of the banner displayed on B is?

2. The FEC forward error correction algorithm is an algorithm that sends redundant data at the transmitting end, and the decoding end recovers the code stream based on the redundant data.

3. Which of the following does not belong to the video conferencing system protocol system?

4. Which of the following is not the most basic component of the H.323 protocol framework?

5. Regarding the relationship between auxiliary streams and audio and video, which of the following descriptions is wrong?

6. The basic functions of GateKeeper defined in the ITU-TH.323 protocol do not include?

7. 08:08:01 ARJ sendto [(61.131.13.141:1719)] [Caller] [59512724] [(61.131.13.141:1720)] [Callee][59522000051] [[Ox0000006derr_call callee_offline]

From the above GK log, we can see that the possible reasons for the call failure are?

8. In the H.323 protocol system, H.225 RAS is carried on the () layer

9. Among the following RAS messages, which one enables the gatekeeper to reject the node's access authentication and address resolution request?

10. The gateway in H.323 is between a circuit-switched network and a packet-switched network.

11. Which of the following is not a security mechanism of SIP?

12. Cancel transaction can be used to cancel which of the following transaction?

13. Configure Huawei GK-1 and Huawei GK-2 as neighbor GKs. Terminal A and Terminal B are registered in GK-1, and Terminal C is registered in GK-2. If both GK-1 and GK-2 enable Q931 routing, and terminal A actively calls the number of terminal C and the call is successful, how many SETUP messages are used in the call process?

14. The terminal reads camera data through which of the following?

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

16. TE60 supports multi-viewing effects up to?

17. Which of the following terminals does not support 8M call bandwidth?

18. The maximum pickup distance of VPM220 array microphone is?

19. Local terminals or remote terminals cannot call each other through IP addresses. Which of the following statements is incorrect?

20. VP96XX MCU supports which port allocation strategy?

21. Which of the following interfaces on the MCU is the default business network port?

22. GK’s active/standby switching is coordinated by heartbeat connections.

23. When using the MCU fence mode, the firewall in the original network needs to be modified (such as opening ports).

24. When using the MCU fence mode, the terminal on the GEO side can call the terminal on the GE1 side through IP.

25. How many E1 lines can 86 series MCU service board connect to at most?

26. SMC2.0 is based on the enterprise organizational structure management model. How many system users are there by default?

27. The implementation principle of the SMC2.0 configuration lock function is that the SMC regularly delivers the configuration to the terminal device, and the terminal parameters modified by the user will be restored by the SMC.

28. In the SMC2.0 system, which of the following users has the highest authority level?

29. All MCUs in the same service area must have the same prefix number.

30. In the recorded meeting, the network recording service records the meeting content and also supports real-time viewing of the meeting through the live broadcast client.

31. A terminal failed to register with GK and found that the rejection code of GK was gkRejGkNoEnoughRegTable. Which may be caused?

32. Network recording supports downloading recorded video files to the local in which format and supports local playback?

33. The IP of a private network terminal is 10.1.0.10, the static NAT export address is 61.1.0.10, the GK address is 61.1.0.11, and there is another public network terminal: 61.1.0.12. At this time, the public network terminal calls the private network in point-to-point IP mode, which is calling address?

34. Under static NAT networking, the packets sent by private network terminals through the firewall will be changed. Which of the following descriptions is wrong?

35. During a call using the H.323 protocol, the RRQ message Payload of the calling site contains Caller RAS Addr, Caller number, and Caller CsAddr.

36. After enabling NAT settings on the video conferencing terminal, the content of the packets can be changed. It can be used in static NAT networking mode or DNAT/NAPT networking.

37. In the default configuration of the firewall, communication from a high-security network (intranet) to a low-security network (Internet) is generally not restricted, but the firewall will block it on the other hand.

38. See networking. Assume that all terminals have been registered to GK/SC, there are no port restrictions on NAT1 and NAT2, and all terminals are TE30 terminals (H.323). Then T1 calls T3. Which of the following description is correct?

39. Which is the core reason why video conferencing supports public and private network traversal?

40. The network on the TP3106 wall is connected to which port of the switch by default?

41. In the IP settings of the telepresence codec of the TP3106 system, the local IP should fill in the intranet address.

42. When installing the small table plate of the flip screen on TP3106, it needs to be adjusted directly by hand and cannot be powered on.

43. TP3106 three-screen telepresence calling sequence is?

44. Which of the following is a safe access method for remote maintenance of telepresence hosts?

45. A multi-point conference is held on the VP9650 MCU, and the auxiliary stream adopts the "Live" mode. The MCU can distribute the video stream to all venues according to its own conference strategy.

46. The interconnection between two U1900 series unified gateways can only be achieved through SIP trunking.

47. The customer purchased two SCs, SC1 and SC2 respectively. Even if SCI is configured with one service IP and SC2 is configured with two service IPs, it will not affect the master-standby relationship between SC1 and SC2.

48. The AR router provides SIP signaling tracing function, which needs to be viewed in the diagnostic view.

49. In the SMC2.0 service area configuration, only one server prefix can be configured for each service area.

50. In video systems, image processing uses RGB color space.

51. In the SIP session service, in which of the following ways does the called terminal realize the interaction of media capabilities?

52. In a remote disaster recovery scenario, when the main node (U1981) fails, POTS user A of a branch node (the branch site device is U1911) makes an outbound call to local PSTN user B through the branch node, and the SIP signaling of the call passes through network element is?

53. In H.460 public-private network traversal networking, TS (traversal server) does not need to have which of the following functions?

54. Which Huawei patented technology has been introduced in the TP3206 system based on the old version TP3106?

55. In a built-in MCU terminal plus RSE network, which of the following functions can be independently implemented on the terminal without the help of SMC?

56. In the same service area, there are VP9650 MCU and VP8650 MCU (both have sufficient available resources). If the "Main MCU" parameter is configured as "Auto" on SMC2.0, which MCU will SMC use first?

57. Which of the following descriptions of SIP registration is incorrect?

58. By connecting the RS-232 control interface of the HD camera and the COM port of the HD terminal through a COM port cable, the HD terminal can remotely control the pan, tilt, zoom, preset position, etc. of the camera. The length of the COM port cable is fixed and cannot be extended.

59. Direct sound refers to the sound signal that reaches the listener directly from the sound source. The meeting requirements are mainly direct sound.

60. In the H460 public-private network traversal single SC network, the H.245 TCP connection of the private network terminal is established with the TS (traversal server).

61. Packet loss retransmission ARO is similar to the TCP retransmission mechanism. When the UDP packet loss of the video code stream is detected in the network, the peer is required to resend the UDP code stream. Decoding begins when the receiving end receives the retransmitted code stream.

62. The U1911 system requires an MTU board to complete analog trunk outbound calls.

63. The built-in voice mailbox of U1960 does not include which of the following functions?

64. In the scenario where a private network terminal calls a public network terminal, when the logical channel is opened, the media stream will be unidirectional. The reason may be which of the following?

65. During the meeting, if the remote end reports that our image is blurred and the image is normal through the local video loopback test, which of the following reasons is responsible for this phenomenon?

66. Color temperature affects the color reproduction of video images. If the color temperature is higher, what color will the image tend to be?

67. A company has deployed a U1981 and is connected to the PSTN through a PRA trunk. If you want external users to be unable to call external users after incoming calls through this trunk, it is recommended to configure which of the following trunk outgoing call permissions is recommended?

68. Which of the following devices can provide a unified address book service for the video conferencing system?

69. In the U1900 series unified gateway, which of the following descriptions about prefixes is correct?

70. Which layer is the SIP protocol?

71. Which of the following descriptions about SMC2.0 service area backup is correct?

72. The existing venues T1 and T2T3 have venue numbers 0571001, 0571002, and 0571003 respectively. There are three MCU1, MCU2, and MCU3 with prefixes 0571, 0551, and 0755 in the same service area. Nowadays, these three venues are used on SMC to convene tripartite meetings. Which of the following statements is correct?

73. Which of the following descriptions of Adhoc meetings is incorrect?

74. The company is now going to hold a provincial seminar, which requires City A Conference Center and City B Conference Center to join in and hold it together. Conference centers in city A often use conference template A to hold meetings, and conference centers in city B often use conference template B to hold meetings. From the perspective of feasibility and ease of operation, which of the following methods can be used to initiate a meeting?

75. Which of the following descriptions about the internal bus and hardware modules of the U1900 system is incorrect?

76. The code rate calculation method of the PCM audio stream of the audio signal is the sampling rate value x sampling size value x number of channels.

77. The screen size of a tablet computer is 9 inches, and the maximum screen resolution is 1080p. What is the approximate pixel density ppi of the screen?

78. When SMC2.0 schedules a conference, it prompts "Insufficient IP port resources", but the MCU is online and the number of IP ports is sufficient.

Which of the following options may cause this error?

79. If a Huawei TE series terminal is used for point-to-point calls and the video-related configurations are set to "Auto", which of the following descriptions is correct?

80. In a multi-channel cascade, how are the multi-channel usage priorities of the upper and lower MCUs allocated?