H11-861 Online Practice Questions and Answers

The quality of digital signals depends on the following factors. ( ) (Select 3 answers)

A. Bandwidth

B. Sampling rate

C. Bit depth

D. Number of audio channels

The sharp and smooth policy is applicable to single-point conferences and multiple local points conferences, except multiple remote points conferences. ( )

A. TRUE

B. FALSE

Current video communication mainly uses the 4:2:0 sampling. ( )

A. TRUE

B. FALSE

NAT works at the ( ).

A. Data link layer

B. Network layer

C. Application layer

D. Transport layer

Image format refers to image size or resolution. Common image formats contain: SQCIF, QCIF, CIF, 4CIF, 16CIF, HD, Full HD.( )

A. TRUE

B. FALSE

For MCU Video Firewall Mode, the original firewall settings (for example, ports that are enabled) need to be changed. ( )

A. TRUE

B. FALSE

When you schedule a conference, a message is displayed to indicate insufficient IP port resources. Meanwhile, the MCU used to host the conference is online and has sufficient IP ports. What are the possible causes for this situation. ( ) (Select 2 answers)

A. No MCU resources are available for the service area;

B. The license resources are insufficient.

C. The site protocol and transmission rates do not match.

D. The MCU has not registered with the GK.

The network recording server can simultaneously record conferences and live broadcast them.( ) A. TRUE

A. FALSE

In any view mode, a site can view the video of any other sites. ( )

A. TRUE

B. FALSE

A zone consists of endpoints managed by the GK and the gateway and MCU. In a zone, at least one endpoint must be available and the gateway and MCU are optional.( )

A. TRUE

B. FALSE

The network device connected to an MCU network port must be 100 Mbit/s half-duplex.( )

A. TRUE

B. FALSE

The recording request from a video terminalis sent to the MCU and the MCU controls the record ing. ( )

A. TRUE

B. FALSE

The advantages and disdvantages of Automatic Repeat request (ARQ) are Q. (Select 2 answers)

A. it has high requirements for latency, which makes it difficult to use in live networks, it is effective only in slight packet loss. In addition, it results in more video jitter

B. it occupies little bandwidth and slightly impacts the video quality

C. The video quality is affected because the redundant data occupies some bandwidth. In addition, it cannot handle burst packet loss, and a certain delay is introduced

D. it can restore the lost data with a certain probability and it is applicable to common packet loss scenarios

The NLog V2 requires a flash player plug-in to be fully functional.( )

A. TRUE

B. FALSE

Dynamic Dual Streams,supports concurrent transmission of ( ) independent images.

A. 2

B. 3

C. 4

D. 5