NAT types include ( ). (Select 3 answers)
A. Static NATIn video firewall mode, the endpoint connected to the GEO port can call the endpoint connected to the GE1 port by IP address.( )
A. TRUEARQ carries information about the MCU including the IP address and port number and number about the endpoint to be called.( )
A. TRUEThe cascaded conference can have no more than three layers. ( )
A. TRUEOn an H.460 network, setting of the keep-alive duration, keep-alive port, and keep-alive field are transmitted during transmission of ( ).
A. ARQ messagesARQ is Similar to the TCP retransmission mechanism, when the network detects UDP packet loss in video stream, it requires the peer to resend UDP stream. The receiver uses a buffer to store code stream, and starts decoding after receiving the retransmitted UDP stream. ( )
A. TRUEFor Basic request messages, ( ) is used for querying the SIP server capabilities.
A. INVITEVideo streams sent from the MCU to the recording server can be ( ) on the server. (Select 3 answers)
A. Live broadcastA transaction must contain ( ). (Select 3 answers)
A. A request messageOver an H.460 network, communication between the video terminal and client GK complies with ( ).
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