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Under the static NAT network, which is wrong about the signaling description of the public network terminal calling the private network terminal?
Under the static NAT network, which is wrong about the signaling description of the public network terminal calling the private network terminal?A . Callee Cs addr is the NAT address B. Caller Cs addr is the NAT address C. The DST address actually processed by the firewall is the private...
SDP is a text-based protocol for media type, encoding scheme, address negotiation, etc. during session establishment.
SDP is a text-based protocol for media type, encoding scheme, address negotiation, etc. during session establishment.A . TRUE B. FALSEView AnswerAnswer: B
CANCEL transaction can only be sent after a provisional response to an INVITE (including 100) is received before the final response.
CANCEL transaction can only be sent after a provisional response to an INVITE (including 100) is received before the final response.A . TRUE B. FALSEView AnswerAnswer: A
A firewall protects a network from attacks by "untrusted" networks, but must also allow legitimate communication between the two networks.
A firewall protects a network from attacks by "untrusted" networks, but must also allow legitimate communication between the two networks.A . TRUE B. FALSEView AnswerAnswer: A
The single value in the header field can only appear once in the message, such as Via, Route, etc.
The single value in the header field can only appear once in the message, such as Via, Route, etc.A . TRUE B. FALSEView AnswerAnswer: A
The signal flow of the audio loop is?
The signal flow of the audio loop is?A . Microphone->Audio Input->Audio Output->Speaker B. Audio Output->Audio Input->Speaker->Microphone C. Microphone->Audio Output->Audio Input->Speaker D. Speaker Audio Input -> Audio Output -> MicrophoneView AnswerAnswer: A
The branch parameter of the CANCEL transaction is the same as the INVITE.
The branch parameter of the CANCEL transaction is the same as the INVITE.A . TRUE B. FALSEView AnswerAnswer: A
The stretching mode is full-screen stretching according to the output ratio, and part of the image will be captured.
The stretching mode is full-screen stretching according to the output ratio, and part of the image will be captured.A . TRUE B. FALSEView AnswerAnswer: B
The illuminance is based on the luminous flux received by the vertical plane. If it is irradiated obliquely, the illuminance will decrease.
The illuminance is based on the luminous flux received by the vertical plane. If it is irradiated obliquely, the illuminance will decrease.A . TRUE B. FALSEView AnswerAnswer: A
Among the four elements of packet filtering by the firewall, the conditions that can generally be omitted are?
Among the four elements of packet filtering by the firewall, the conditions that can generally be omitted are?A . Destination port B. Source Port C. Destination address D. Source addressView AnswerAnswer: A
