Accept the message sent by the terminal to the gatekeeper about the gateway request to deregister registration, which of the following signaling can achieve this function

As can be seen from the figure, the venue can not receive remote venue video in the meeting, what measures can the user take to locate the cause of the failure?

AN INVITE transaction consists of a three-way handshake. The client transaction sends INVITE, the server transaction sends the response, and the client transaction sends an ACK, ( ).

Which of the following is not a disadvantage of forward error correction?

In a networking network, what is the code flow hole between the public network and the private network terminal maintained? ( )