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| Section | Objectives |
|---|---|
| IP Telephony Basics | |
| Deployment and Maintenance | |
| VoIP Protocols | - H.323 Protocol Basics - SIP Protocol Basics |
| Enterprise Communication Solutions | - Unified Communications Services - Huawei eSpace Architecture |
| Collaboration Fundamentals | |
| Network Fundamentals for Collaboration | - RTP and Media Transport - QoS Concepts |
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NEW QUESTION # 15
Which of the following basic request messages is used to terminate a session?
Answer: D
Explanation:
SIP provides different request methods for controlling the lifecycle of multimedia communication sessions.
Each method performs a specific signaling function.
The BYE request terminates an established SIP session. Either participant can initiate a BYE request when the communication must end. After the request is processed successfully, the receiving entity returns a final response, typically 200 OK, completing the session-termination signaling procedure.
Option C is therefore correct.
Option A, CANCEL, terminates a pending request before the associated transaction has completed. It is commonly used to cancel an unanswered call attempt. CANCEL does not terminate an already established session.
Option B, ACK, acknowledges the final response to an INVITE request. Its purpose is to complete the relevant INVITE signaling procedure rather than terminate a session.
Option D, INVITE, initiates a multimedia session or changes an existing session through a subsequent INVITE exchange. It is not the standard method for terminating an established session.
Huawei's Training Material explicitly identifies BYE as the basic SIP request used to release an established call.
The examination distinction is between canceling an incomplete session-establishment attempt and terminating a session that has already been established. CANCEL addresses the former condition, while BYE addresses the latter.
Huawei reference: Training Material, PDF pages 100-101, SIP Requests (1) and SIP Requests (2); PDF page
107, Non-INVITE Transactions.
NEW QUESTION # 16
A company has deployed three MCUs within the same service area. When starting a conference, it needs to preferentially choose the MCU that has the greatest number of available ports for the conference connection.
Which feature is required to accomplish this?
Answer: C
Explanation:
Load balancing is the MCU resource-management mechanism that preferentially allocates conference connections to the MCU with the greatest available resource capacity within an MCU resource pool.
In the described deployment, three MCUs belong to the same service area. When participants initiate a conference, the SMC evaluates available MCU resources and directs connections to the most suitable device.
Huawei's resource-pool scheduling mechanism preferentially selects the MCU with the most abundant available resources.
Option A is therefore correct.
Option B, intra-pool backup, provides recovery within the same MCU resource pool. If an MCU fails, conference services can be transferred to another available MCU in that service area.
Option C, inter-pool backup, provides recovery across service areas. It is used when the original service area cannot provide the required resources or experiences an applicable failure condition.
Option D, automatic cascading, combines resources from multiple MCUs when a single MCU cannot independently accommodate the required conference capacity.
The critical requirement in the scenario is preferential resource selection during conference establishment, not fault recovery or combining multiple MCUs.
Huawei's Training Material explicitly identifies load balancing as the mechanism that gives preference to the MCU with the greatest available resources. This directly supports option A.
Huawei reference: Training Material, PDF page 453, MCU Resource Pools Ensure Conference Stability, and page 559, Resource Pool Management for Stable Conference Experience.
NEW QUESTION # 17
Which of the following devices support the on-premises conference function by default?
Choose two
Answer: B,D
Explanation:
Huawei IdeaHub models differ in their default conferencing capabilities and licensing requirements. Some models support on-premises video conferencing immediately, while others require additional licensing to activate the function.
Option A is correct because the IdeaHub ES2 Plus supports on-premises conferencing. Huawei positions this model for premium enterprise meeting scenarios requiring advanced audiovisual capabilities and integrated conferencing functions.
Option D is also correct. The Huawei Training Material explicitly states that the IdeaHub S2 Pro supports on- premises meeting scenarios by default.
Option B is incorrect because the IdeaHub ES2 requires an on-premises meeting license before the corresponding functionality can be used. Huawei distinguishes the standard ES2 from the ES2 Pro and ES2 Plus in this respect.
Option C is incorrect. The IdeaHub Board 3 is not identified in the supplied V4.0 Training Material as one of the models providing the specified on-premises conference functionality by default. The course material describes the Board series primarily in the context of interactive display, education, and collaborative office applications.
The examination requires candidates to distinguish built-in conferencing capabilities from functions that depend on additional licenses.
Accordingly, the correct selections are A and D.
Huawei reference: Training Material, PDF pages 262-269, HUAWEI IdeaHub Product Overview, Commercial Product Comparison, and Introduction to IdeaHub ES2 Series; PDF pages 270-271, Introduction to IdeaHub S2 Series.
NEW QUESTION # 18
Which of the following messages are SIP requests?
Choose two
Answer: C,D
Explanation:
The Session Initiation Protocol (SIP) is an application-layer signaling protocol used to establish, modify, and terminate multimedia communication sessions.
SIP messages are divided into two fundamental categories: requests and responses.
Option A, CANCEL, is a SIP request used to cancel a pending request before the associated transaction has completed. It is commonly used when a caller withdraws a call attempt before session establishment.
Option B, REGISTER, is also a SIP request. Its purpose is to register or update a user's contact information with a SIP registration server, allowing the system to associate the user's logical identity with a reachable network location.
Options C and D are not SIP requests. They are SIP response-code classes.
The 3xx response class represents redirection. It indicates that additional action is required, typically involving an alternative destination, to complete the requested operation.
The 2xx response class represents successful processing. For example, a 200 OK response indicates that a SIP request has been accepted and processed successfully.
Huawei's Training Material explicitly lists CANCEL and REGISTER among the six basic SIP request methods and identifies the 2xx and 3xx ranges as SIP responses.
Therefore, the correct selections are A and B.
Huawei reference: Training Material, PDF pages 99-102, Classification of SIP Messages, SIP Requests, and SIP Responses.
NEW QUESTION # 19
Assume that a user holds a multipoint conference using the Huawei video conferencing system. After a participant is unmuted and broadcast, the microphones of the remaining participants are automatically muted.
Which conference-control operation can the user perform on the SMC to produce this effect?
Answer: A
Explanation:
Huawei SMC provides conference-control functions that allow administrators to regulate participant audio, video, and presentation behavior during multipoint conferences.
The Giving the floor function assigns speaking priority to a selected participant. When this operation is performed, the selected participant's video is displayed to the other participants, and the microphones of the remaining participants are automatically muted.
Option C is therefore correct.
Option A, Free discussion, is intended to enable open interaction among participants. Huawei describes this function as unmuting participants and stopping the current broadcast, making it unsuitable for the scenario.
Option B, Locking a conference, restricts conference access or related operations according to the configured locking function. It does not implement the specific speaking-priority behavior described.
Option D, Muting all, applies microphone muting to participants collectively. It does not independently grant speaking priority and broadcast one selected participant while leaving that participant unmuted.
The Lab Guide explicitly describes Giving the floor as a conference-control operation in which other participants are muted and automatically view the specified participant.
This functionality is especially useful in formal meetings, presentations, administrative conferences, and other structured discussions where one participant must address the conference without interruption.
Huawei reference: Lab Guide, Section 4.5.1, Conference Control UI, PDF pages 104-105; Section 4.5.2, Giving the Floor, PDF pages 107-109. Training Material, Conference Control Functions.
NEW QUESTION # 20
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