In the Huawei CloudVC 21.0 back-to-back (B2B) networking solution, firewall traversal is achieved using two SwitchCenters (SC) . To ensure security, the connection must be initiated from the more secure zone to the less secure zone.
* Intranet SC: Acts as the Traversal Client (TC) . It resides in the internal network and initiates the connection to the SC in the DMZ.
* DMZ SC: Acts as the Traversal Server (TS) . It resides in the DMZ and waits for the connection request from the intranet SC.
Statement A is incorrect because it claims the DMZ SC is the client and the intranet SC is the server, which is the reverse of the actual technical configuration. The other statements are correct: the SMC can manage extranet endpoints via the traversal link (B), extranet endpoints use the DMZ SC as their entry point (C), and CloudRSE deployment is flexible based on where the VOD/Live services are consumed (D).

Reverse control allows a user to control the projected computer directly from the IdeaHub's large touchscreen.
* IdeaShare Key (A): The hardware dongle supports "Touch Back," allowing users to navigate slides or open files on the PC from the IdeaHub.
* Type-C Cable (B): A wired connection via a full-featured USB-C cable transmits video, audio, and touch signals simultaneously.
* IdeaShare App (C): The software-based projection method includes a reverse control toggle to allow the IdeaHub to act as a remote input for the PC.
* HDMI Cable (D): Standard HDMI only transmits video and audio. Without a secondary USB-touch cable, it cannot carry the touch data required for reverse control.

Student eye health is a primary focus for Huawei's education products. The IdeaHub Board 2 features a specialized 4K soft-light screen that utilizes Hardware-level Optical Anti-Blue Light technology. This technology shifts the peak of harmful blue light without causing the yellow color cast associated with software filters. This feature has been rigorously tested and officially certified by TUV Rheinland (Low Blue Light Hardware Solution Certification and Eye Comfort Certification), ensuring it meets global standards for long-term viewing safety in classrooms.

The document scanner (also referred to as a Visualizer or Physical Booth ) in the Huawei digital classroom solution is designed to digitize physical teaching materials, such as homework, textbooks, and student papers.
These devices are fully integrated with the IdeaHub and the accompanying teaching software, allowing teachers to capture images and save them in various standard formats, including PDF and JPG. These files can then be shared via QR code, email, or saved to cloud storage. Therefore, the statement that it "cannot" support PDF generation is false.

The Huawei CloudMCU is a converged media platform that supports a wide range of industry-standard audio codecs to ensure interoperability and high-quality voice. According to official technical specifications, the supported audio protocols include:
* Narrowband: G.711a/u, G.729, G.729A, and iLBC.
* Wideband/High-Fidelity: G.722, G.722.1, G.722.1C (Siren7/14), OPUS, and AAC-LD.
G.721 is an obsolete 32 kbit/s ADPCM standard that was officially superseded by and incorporated into the G.
726 standard. Because it is a legacy protocol not used in modern high-definition video conferencing, it is not supported by the CloudMCU.