Which of the following backup methods is not supported by VP9660 MCU? ()
A. Power backup
B. Media/signaling board backup
C. Main control board backup
D. IP/E1 line backup
正解:D
質問 2:
Phone A has been successfully registered to the U1900 system. At some point, unplug the network cable. At this time, log in to the U1900 system to check the registration status of phone A. The following statement is wrong ()
A. The registration status of phone A in the U1900 system may change after a period of time
B. The registration status of phone A in the U1900 system may remain unchanged
C. The registration status of phone A in the U1900 system may change immediately
D. The registration status of phone A in the U1900 system is updated, only after the network cable of phone A is unplugged, the change occurs after half of the registration period of phone A has passed
正解:D
質問 3:
In the H.460 public and private network traversal single SC network, the H.245 TCP connection of the private network terminal is established with the TS (traversal server). () Correct or Wrong
A. Correct
B. Wrong
正解:A
質問 4:
In the VoIP system, what are the factors that affect the quality of voice calls () (multiple choice)
A. Jitter
B. bandwidth
C. delay
D. Packet loss
正解:A,B,C,D
質問 5:
In the H.323 protocol, the message used to control the opening of the logical channel is ()
A. CLC, CLCA
B. MSDR, MSDA
C. TCSR, TCSA
D. OLC, OLCA
正解:D
質問 6:
What protocol does the video conference terminal use to ensure the security of SIP signaling transmission () (single choice)
A. HTTPS
B. TLS
C. SRTP
D. RTCP
正解:B
質問 7:
One codec rate is 64kbps, and the packaging time is 20ms. What is the IP band occupied by the codec? The width is () kbps (Note: IP/UDP/RTP header is 40 Bytes, here 1kbps=1000bps)
A. 80
B. 76.6
C. 90.4
D. 83.6
正解:A
Ono -
たくさん問題を解いておきたい方にはおすすめできますね。出題範囲を100%カバーしている。Pass4TestのH11-879は最強。友達にも勧めました。