An endpoint is disconnected from a conference due to a power failure. After the endpoint is powered on again, it is not called to the conference again, and the SMC does not detect that the endpoint is disconnected. The SMC O&M engineer finds that this fault is caused by the "Timeout for hang-up upon no code streams" parameter on the CloudMCU. Which of the following parameter values may cause this fault? (Choose all that apply.)

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.

In a hybrid multistream conference, SVC and AVC endpoints can join the conference at the same time. By default, the system provides the same continuous presence experience as the AVC conference.

Generally, the bandwidth actually occupied by a video conference is greater than the conference bandwidth. What are the possible causes? (Choose all that apply.)

Which of the following is the maximum number of cascaded conference levels supported by the SMC?