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Huawei H11-861_V4.0 Exam Syllabus Topics:
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NEW QUESTION # 31
Which of the following permissions are granted to an SMC system administrator? (Choose all that apply.)
- A. System configuration
- B. Conference management
- C. User management
- D. Conference room management
Answer: A,C
Explanation:
The System Administrator role grants full privileges for system configuration tasks and for managing administrator user accounts; it does not include conference or room management functions.
NEW QUESTION # 32
Generally, the bandwidth actually occupied by a video conference is greater than the conference bandwidth. What are the possible causes? (Choose all that apply.)
- A. Retransmission of lost packets occupies some bandwidth.
- B. IP packet headers occupy some bandwidth.
- C. Signaling interaction data occupies some bandwidth.
- D. UDP packet headers occupy some bandwidth.
Answer: A,B,C,D
Explanation:
The actual bandwidth exceeds the nominal conference bandwidth because of protocol overhead (both IP and UDP headers), signaling exchanges, and any retransmissions of lost packets, all of which consume additional capacity.
NEW QUESTION # 33
In a SIP multipoint conference, if BFCP Trans Type is set to TCP on the MCU, the BFCP communication protocol must be set to TCP on the endpoint.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
BFCP transport must match between the MCU and endpoints; if the MCU is configured for TCP, endpoints must also use TCP for BFCP.
NEW QUESTION # 34
SIP and SDP are independent of each other. SIP can implement multimedia calls independently to add new applications or media easily.
- A. FALSE
- B. TRUE
Answer: A
Explanation:
SIP relies on SDP for session description in multimedia calls; it cannot negotiate media parameters independently of SDP.
NEW QUESTION # 35
Which of the following statements is true about image sampling?
- A. The transmission rate of video data using YUV 4:2:0 is 140 Mbit/s. If the 4:2:2 mode is used, the transmission rate required by the video is 175 Mbit/s.
- B. RGB components have weak correlation, which is unfavorable for video image compression. Therefore, RGB is often used for image display.
- C. For human eyes, the Y component in YUV is the most important. Therefore, downsampling can be performed on the UV components.
- D. The YUV 4:2:0 sampling mode is half the size of the YUV 4:4:4 sampling mode.
Answer: D
Explanation:
YUV 4:2:0 subsamples chroma by a factor of two in both horizontal and vertical dimensions, reducing total data to half of the full-resolution YUV 4:4:4 format.
NEW QUESTION # 36
Which of the following statements are true about the SC cluster reconstruction deployment scenario? (Choose all that apply.)
- A. If the number of SIP endpoints is much greater than that of H.323 endpoints, an SC cluster can be deployed for SIP endpoint access. The non-cluster registration SC is reserved for H.323 endpoint access.
- B. If the number of connected extranet soft clients is greater than 2000, you are advised to reconstruct a non-cluster proxy SC into a proxy SC cluster.
- C. If the number of SIP endpoints is far less than that of H.323 endpoints, you are advised not to deploy the SC cluster.
- D. If the number of SIP endpoints is much greater than that of H.323 endpoints, an SC cluster can be deployed for SIP and H.323 endpoint access.
Answer: A,B,C
Explanation:
When SIP endpoints greatly outnumber H.323 endpoints, you deploy an SC cluster to serve the SIP devices while leaving a standalone SC for the H.323 endpoints.
If SIP registrations are much fewer than H.323 registrations, clustering the SC for SIP isn't recommended, as the scale doesn't justify the added complexity.
A proxy SC supports up to 2,000 external soft-client registrations; if you exceed this, you should rebuild it as a proxy-SC cluster to handle the extra load.
NEW QUESTION # 37
At an SMC video conferencing system site, the customer wants to deploy a conferencing system with converged firewall ports, with a planned DMZ. The SC1 is deployed on the intranet and SC2 is deployed in the DMZ. In this case, which of the following deployment modes is the most suitable one for SC1 and SC2?
- A. SC1 is the registration SC, and SC2 is the proxy SC.
- B. SC1 is the proxy SC, and SC2 is the registration SC.
- C. SC1 and SC2 are both proxy SCs.
- D. SC1 and SC2 are both registration SCs.
Answer: A
Explanation:
Deploying SC1 as the registration SC on the intranet allows internal endpoints to register directly, while placing SC2 as a proxy SC in the DMZ handles external signaling traversal and secures the demilitarized zone.
NEW QUESTION # 38
Which of the following is the format of the configuration file exported from the CloudRSE web interface?
- A. .bin
- B. .txt
- C. .xml
- D. .yml
Answer: C
Explanation:
The CloudRSE web interface exports its configuration in XML format, producing a .xml file for import or backup.
NEW QUESTION # 39
Assume endpoints T1 and T2 are registered with the same SC node zone (signaling routing is enabled on the SC). After T1 calls the number of T2 using H.323, T1 communicates with T2. How many TCP connections are established in this process?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
With signaling routing enabled on the SC, both the H.225 call signaling and the H.245 control channel are each split into two TCP legs (T1→SC and SC→T2), resulting in 2 × 2 = 4 TCP connections.
NEW QUESTION # 40
During a point-to-point call between different GKs, the local GK sends an LRQ request to the neighboring GK to query the information about the called node.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
In H.323, when a gatekeeper needs to locate an endpoint outside its zone, it issues a LocationRequest (LRQ) to the neighboring gatekeeper to retrieve the called party's address.
NEW QUESTION # 41
An AVC conference is scheduled on the CloudMCU (working in SFU mode) and VP9850 (working in IAU mode). After the conf get strmInfo 41353221 command is executed on the CloudMCU, the following information is displayed:
Which of the following is the video stream number generated after the IAU decodes and re-encodes the three video streams of Site (16), Site (17), and Site (18)?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
In SFU+IAU mode, the IAU's re-encoded (decoded and encoded) streams are identified by the MpAdaptStrmNo value under Site(18). In the output, MpAdaptStrmNo[2710124429803] is the stream number carrying all three re-encoded video channels.
NEW QUESTION # 42
The main functions of H.245 include capability negotiation, video encoding, and master-slave determination.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 43
Assume that a dual-channel audio file uses the PCM encoding, the sampling frequency is 8 kHz, and each quantized sample value corresponds to an 8-bit binary code. What is the encoding rate (kbit/s) of the audio file?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
Dual-channel PCM at 8 kHz with 8 bits per sample yields 8,000 × 8 = 64 kbit/s per channel; two channels give 64 × 2 = 128 kbit/s.
NEW QUESTION # 44
In the SIP protocol, the Via header field indicates the route of the subsequent response message.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
The Via header tracks each hop of the request and is used to guide the response back along the same path.
NEW QUESTION # 45
The SMC system O&M engineer John wants to start and stop the SC database (version V600R019C10SPCb20 or later). Which of the following user roles can be used to perform such operations on the database?
- A. sc
- B. vcexpert
- C. gauss
- D. root
Answer: C
Explanation:
The SC's underlying database is a GaussDB cluster, and only the dedicated database OS user (gauss) has the necessary permissions to start and stop it using the GaussDB control utilities.
NEW QUESTION # 46
Which of the following is the maximum number of cascaded conference levels supported by the SMC?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
Huawei's SMC supports cascading up to four conference levels for multi-level conferencing, ensuring efficient management and control across up to four tiers.
NEW QUESTION # 47
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