H11-861_V4.0 Exam Dumps, H11-861_V4.0 Practice Test Questions
PDF (New 2025) Actual Huawei H11-861_V4.0 Exam Questions
Huawei H11-861_V4.0 Exam Syllabus Topics:
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NEW QUESTION # 30
SIP is an application-layer protocol independent of the transport-layer protocols. It can be carried over different transport protocols, such as UDP, TCP, TLS, and SCTP. Currently, SCTP is the most commonly used transport-layer protocol.
- A. TRUE
- B. FALSE
Answer: B
Explanation:
While SIP is transport-agnostic and can run over UDP, TCP, TLS, or SCTP, UDP remains the predominant transport - SCTP is not the most commonly used.
NEW QUESTION # 31
In the collaboration solution architecture, which of the following network elements are deployed at the media processing layer? (Choose all that apply.)
- A. SMC
- B. Box 310
- C. VP9860
- D. CloudRSE
Answer: C,D
Explanation:
The media processing layer handles core media functions such as audio/video encoding, decoding, mixing, recording, and streaming. The VP9860 is Huawei's MCU media server - deployed precisely in this media processing (media switching) layer to provide high-density encoding/decoding and mixing capabilities. CloudRSE (Cloud Recording & Streaming Engine) delivers recording and streaming services, which are also key media processing functions within this layer.
NEW QUESTION # 32
In a Huawei video conference, which of the following may cause echoes or even high-pitched noises when the local participant speaks? (Choose all that apply.)
- A. The endpoint's input volume is lower than the minimum energy threshold required for echo cancellation.
- B. Another participant whose speaker is turned off is at the local site.
- C. An audio loop exists. The external audio device feeds back the sound from the endpoint output port to the endpoint input port.
- D. The microphone is too close to the speaker.
Answer: A,C,D
Explanation:
If the input volume falls below the echo canceller's detection threshold, the device can't identify and suppress return audio, leading to echoes or squealing.
An audio loop, where output is fed back into the input, directly causes echo and feedback noise.
Placing the microphone too close to the speaker allows direct pickup of its output, resulting in echo and potential high-pitched feedback.
NEW QUESTION # 33
By default, a single registration SC server supports a maximum of 20,000 registered devices.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
By default, a Registration SC server supports up to 20,000 registered devices, as specified in the Huawei SC product specifications.
NEW QUESTION # 34
Which of the following statements are true about personal virtual meeting room (VMR) provisioning?
- A. The SMC can provision personal VMRs to conference users one by one or in batches.
- B. The SMC can provision personal VMRs to conference rooms one by one or in batches.
- C. The SMC can provision personal VMRs to conference users only one by one.
- D. The SMC can provision personal VMRs to conference rooms only one by one.
Answer: A,B
Explanation:
The SMC's service provisioning functions include both single-item and batch modes for personal VMR assignment, whether you're binding VMRs to conference rooms or to individual users, you can provision them one by one or import a list and provision them in bulk.
NEW QUESTION # 35
Currently, the widely used video compression standards include H.263, H.264, H.265, MPEG-1, MPEG-2, and MPEG-4. The H.26X series standards are mainly used for real time video communication, and the MPEG series standards are mainly used for video storage (DVD), video broadcast, and video streaming media.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
The H.26x family (H.263, H.264/AVC, H.265/HEVC) was designed with low-latency, real-time encoding/decoding in mind (ideal for videoconferencing and streaming calls) whereas MPEG-1/2/4 were originally optimized for file-based storage (VCD/DVD), broadcast and progressive streaming. Modern deployments often blend these. For example, using H.265 for both live calls and high-efficiency streaming and newer standards (like H.266/VVC) are now emerging.
NEW QUESTION # 36
In the SIP protocol, the Via header field indicates the route of the subsequent response message.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
The Via header tracks each hop of the request and is used to guide the response back along the same path.
NEW QUESTION # 37
In the encrypted conference scenario, the SIP transmission type must be set to TLS on both the MCU and endpoint.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
To secure SIP signaling in an encrypted conference, both the MCU and endpoints must use TLS as the transport for SIP messages.
NEW QUESTION # 38
FILL in BLANK
In an SVC intelligent forwarding conference, if an SVC participant requires to view 1080p video, the bandwidth of the SVC participant must be at least ____________ Mbit/s. (Enter an Arabic numeral.)
Answer:
Explanation:
6
Explanation:
In an SVC intelligent forwarding conference, delivering 1080p (1920×1080) at 30 fps requires approximately 6 Mbit/s of bandwidth to carry the base and enhancement layers needed for full-HD reconstruction.
NEW QUESTION # 39
In an SVC hybrid conference (scheduled on the SFU and IAU), when an AVC participant views continuous presence of an SVC participant, dynamic codec resources on the IAU are consumed. When an AVC participant views continuous presence of other AVC participants, no dynamic codec resources are consumed.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
Displaying SVC streams to AVC endpoints requires IAU decoding and encoding, consuming dynamic codec resources; forwarding native AVC streams uses SFU without engaging IAU resources.
NEW QUESTION # 40
Which of the following statements are true about the intranet-only SC cluster network? (Choose all that apply.)
- A. The intranet registration SC cluster provides only SIP registration.
- B. A standalone SC should be deployed to provide registration services specifically for H.323 endpoints.
- C. If a large number of SIP hard endpoints or soft clients are located on the intranet, you can deploy a registration SC cluster on the intranet.
- D. 323 endpoints must register with a standalone SC when an intranet-only cluster is used.
- E. The intranet SC cluster supports two distribution modes: single-active distribution and multi-active distribution.
Answer: A,B,C,E
Explanation:
Deploying an intranet registration SC cluster is recommended when there are large numbers of SIP hard or soft endpoints.
Explanation:
An intranet-only SC cluster handles SIP registrations exclusively, offloading SIP endpoint load.
The cluster can be deployed in single-active or multi-active distribution modes for flexibility and redundancy.
NEW QUESTION # 41
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. FALSE
- B. TRUE
Answer: B
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 # 42
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: B
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 # 43
The start line of a SIP response consists of three parts: method (Method), request URI (Request-URI), and protocol version (SIP-VERSION).
- A. TRUE
- B. FALSE
Answer: B
Explanation:
A SIP response start line is a Status-Line containing the SIP version, status code, and reason phrase - not the method and Request-URI.
NEW QUESTION # 44
Assume endpoints T1 and T2 are registered with the same SC node zone. After T1 calls the number of T2 using H.323, T1 and T2 communicate with each other. Which of the following statements are true about the call process? (Choose all that apply.)
- A. In this process, the H.225 RAS signaling interaction between T1 and T2 must pass through the SC.
- B. 225 RAS messages (registration, admission, status) always traverse the SC (gatekeeper) for endpoints in the same zone.
- C. In this process, the media stream must be directly transmitted between T1 and T2.
- D. Endpoint control signaling involved in this process mainly includes H.225 RAS, H.225 Call Signaling, and H.245.
- E. In this process, the H.225 call signaling interaction between T1 and T2 must pass through the SC.
Answer: A,C,D
Explanation:
RTP media is exchanged directly between T1 and T2 once the call is established.
The call control sequence involves H.225 RAS (registration/admission), H.225 call signaling (SETUP/CONNECT), and H.245 control for capabilities.
NEW QUESTION # 45
Which of the following conference parameters need to be obtained by engineers when locating conference faults on the SMC video conferencing system? (Choose all that apply.)
- A. Conference bandwidth
- B. Conference resolution and frame rate
- C. Conference video protocol
- D. Conference type
Answer: A,B,C,D
Explanation:
When troubleshooting conferences, engineers must know the video protocol in use, the conference type, the resolution and frame rate being delivered, and the bandwidth allocation - each of these parameters directly impacts session behavior and helps pinpoint faults.
NEW QUESTION # 46
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 far less than that of H.323 endpoints, you are advised not to deploy the SC cluster.
- B. 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.
- C. 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.
- D. 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.
Answer: A,B,D
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 # 47
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: A
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 # 48
FILL BLANK
In a SIP-only multipoint conference, when a participant sends the presentation, the system uses the ____________ protocol for presentation. (Enter the abbreviation.)
Answer:
Explanation:
BFCP
Explanation:
In SIP-only multipoint conferences, presentation content is delivered using the Binary Floor Control Protocol (BFCP), which handles floor control and content distribution.
NEW QUESTION # 49
Which of the following header fields is used to indicate the route of a response message?
- A. To
- B. From
- C. Via
- D. Contact
Answer: C
Explanation:
The Via header records each hop a request takes and is used to route the corresponding response back along the same path.
NEW QUESTION # 50
When the SMC is used to provision system administrator users, each user can be bound to an endpoint that is used as the conference joining device of the user.
- A. TRUE
- B. FALSE
Answer: B
Explanation:
System administrator accounts in the SMC are management-only and do not support binding to endpoints for use as conference-joining devices; endpoint binding applies only to conference user or room accounts.
NEW QUESTION # 51
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. UDP packet headers occupy some bandwidth.
- C. IP packet headers occupy some bandwidth.
- D. Signaling interaction data occupies 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 # 52
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