QUESTION 334
H.225 contains which of the following signalings ( ).

QUESTION 335
GK When the called node belongs to the neighbor GK region based on the called number, GK supports the request to the neighbor GK to resolve the called number.

QUESTION 336
Each RTP datagram consists of two parts, the header and the payload, where the meaning of the first
12 bytes of the header is fixed , and the payload can be audio or video dat a.

QUESTION 337
Remote audio loopback, from audio input, encoding, transmission through the network to the remote end and then forwarded back, the main test network connection is normal.

QUESTION 338
The HD terminal provides remote control interface, web management, remote SSH function, and assigns a user name and password to each service.

QUESTION 339
Under static NAT networking, the signaling description of the public network terminal called the private network terminal is correctly (). (3 answers).

QUESTION 340
At present, the sampling method mainly used in video communication: 4:2:0 sampling method ().

QUESTION 341
The RTCP protocol can be freely controlled by SDES grouping, with RTCP SDES marking members away from the session, or members changing SSRC.

QUESTION 342
The ability to exchange information includes ( ).

QUESTION 343
The following description of the H.323 call flow is correct

QUESTION 344
H.460 In networking, the communication between the terminal and the clientGK follows the protocol ( ).

QUESTION 345
The sound test is to test whether the terminal audio output is correct.

QUESTION 346
Four metrics, color temperature, illuminance, and color rendering index, are used to measure the effect of conference room lighting, which has an impact on the rendering of video images of the conference.

QUESTION 347
The SIP protocol is the session initiation protocol for establishing, controlling, and releasing sessions.
( )

QUESTION 348
The following description of the relationship between the RTCP port number and the RTP port number is correct ().

QUESTION 349
SIP messages are encoded as text.