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Private network HD terminals use static NAT for public and private network crossing, regarding the calls between terminals, the following statement is incorrect ().
Static NAT converts a private address into an Internet address, and it is many-to-many, and there is no guarantee that a private address will be converted to a public address.
The terminal auxiliary IP is designed so that users can log in to the terminal configuration or debugging in the LAN, which can be used for main business. ( )
GK must support BRQ, BCF r BRJ messages, and accept all bandwidth modification requests. ( )
A short message is one that can send ( ) messages to a designated venue or to all venues for inter-venue communication and information prompting. (Fill in the blanks)
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 data.
Fe and GE0, GE1 IP addresses can not be in the same network segment, otherwise it will cause network failure, at this time the front panel ALM light is always on.
The INFORMATION that the IP header in the SETUP message does not contain Is there? ( )
Under static NAT networking, the signaling description of the public network terminal calling the private network terminal is correctly ( ).
For reverberation, the pickup is dominated by a direct sound, and the appropriate amount of reverberation sounds thicker, and it is recommended that the pickup direct sound be around 90%. However, the reverberation sound after 50ms will affect the language comprehensibility, and it is recommended that the sound energy reached within 50ms accounts for more than 80%.
What are the following message interactions included in the process of a terminal calling by number using the H.323 protocol?
What is the range of empty field noise requirements in the acoustic key indicators?
The main advantages of AAC-LD audio encoding are: low bandwidth, low latency, and high quality. ()
The MCU wall riding mode does not require the use of private protocols and can be used with terminals of different manufacturers. ()
Three-color lamp refers to the use of red, yellow, blue three color spectrum of the lamp and light emitting lamps, the general luminous color and the color temperature of the lamp has a relationship, with a soft luminous light, uniform brightness, no stroboscopic, high visibility, small power consumption, high voltage resistance, no electric heat disaster characteristics.
During a peer-to-peer number call, H.245 performs capability set matching before opening the logical channel. ()
networking network, the H.245TCP connection of the private network terminal is established with TS. ()
When GK agrees to a terminal's registration request, which of the following response messages is sent?
supports up to 1080I dual-stream, which is the industry's highest dual-stream processing capability.
Video compression includes intra-frame compression (I frame) and inter-frame compression (P frame), common H.26X, MPEG-2, MPEG-4 Both support in-frame/inter-frame compression.
Which of the following values does the color rendering index required for video conferencing light sources need to be greater than?
Multicast is a networking technique that allows one or more senders (multicast sources) to send a single packet to multiple receivers (once, simultaneously).
Enter the ( ) filter condition in the Wireshark Display Filter box to display only H.245 protocol-related messages.
Reducing reverberation time can be achieved by covering walls, ceilings, windows, and floors with soft finishing materials.
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?
In Wireshark, the user can click a button to use a large number of bits in OSI model 2 through 7 Layers of agreements are filtered.
When the MCU cannot connect to the SMC, what can I do to locate the cause of the failure?
What are the correct items for the following description of the performance of the RSE6500 product?
Network recording supports downloading recorded files to the local area in the format ( ) and supports local playback. (Fill in the blanks)
The function of the registration server is to map the addresses in the request to zero or more new addresses and then return them to the client.
Cascade channels are used by priority, and resources are mutually exclusive when at the same priority.
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.
The SIP protocol is the session initiation protocol for establishing, controlling, and releasing sessions. ( )
The three modes of operation of the proxy are: Call Stateful, Stateless, transaction Stateful.
In the camera control of the WEB interface, only the local camera can be controlled, not the remote camera. ( )
Terminal control mainly refers to the call signaling of the terminal, the negotiation of logic channels and AV capabilities, and the signaling of conference control.
The Network Diagnostic Tool supports initiating diagnostic tests from the Public Network to the Private Network Diagnostic Tool.
The network diagnostic tool supports remote diagnostic mode, and the network diagnostic tool remotely controls another network diagnostic tool to initiate a network diagnosis and judgment against other
network diagnostic tools.
Any color at the opposite end of the diameter of the color ring is called a complementary color. ( )
In the MCU's web page, the format of the exported address book information is ( ). (Fill in the blanks)
The Call-ID header field serves as a unique identifier for a collection of messages, and in a conversation, the Call-id must be the same in all the last requests sent by each UA. ( )
For the SDP protocol, line c contains information about the connection established for a multimedia session, which indicates the IP address used by the real media stream . ( )
In MCU ride-on-the-wall mode, you can configure IP routing to send and receive data through GE1.
Banners are used to briefly display meeting content, and subtitles are used to highlight the meeting topic.
T140 captions are sent separately to the remote venue, displayed on the remote venue monitor, and superimposed on the local video image.
Master-slave decisions are mainly used to prevent both parties from triggering the same unsharable event or resource at the same time during communication, so a master party needs to be identified in
advance. When a conflict occurs, the slave shall act at the discretion of the master.
VR can be understood as an interactive way to guide users to a destination meeting or create a meeting. ( )
Which of the following protocols is a dual-stream protocol in the H.323 protocol stack?
Conversations are uniquely identified by Cal1-ID, From Tag, To Tag, and can be modified after they are created.
Which of the following sockets on the MCU is the default service network port ( ).
Under the H. 323 protocol, the signaling required to complete the master-slave decision process is. ( )
The following description of the advantages and disadvantages of forward error correction FEC is correctly ( )o
During a point-to-point number call, the terminal ends up getting a ( ) of the peer terminal from GK to make the call.
Enabling SEC, the system can automatically adjust the network transmission and different error corrections of AV processing for the rich QOS mode of the IP network After enabling SEC, the anti-packet loss ability has been greatly improved ()
Under static NAT networking, the SRC address of the terminal under the private network changes to ().
Loudness indicates the strength of the sound, which of the following factors determines the size of the loudness?
Due to the size of the display and the resource limitations of the MCU , the number of multi-screen sprites generally does not exceed 24 , otherwise the image is too small and the picture will not be clear.
A firewall is one that protects a network from attacks by "untrusted" networks, but at the same time must also allow legitimate communication between two networks
Of the six basic request messages, ( ) are used to query the server capabilities
The gatekeeper issues an address resolution request to other gatekeepers, which signaling can implement this function. ( )
RRJ sendto [ ( 218.5.64.98:18616 )] [5928509444] [[0x00000065:err reg wrong account or passwork]] From the above logs, you can tell that the reason for the failure of registration is ( ).
For the SDP protocol, line 0 contains parameters related to the session owner, where the first parameter is represented. ( )
In VR scenarios, the terminal cannot join the meeting in the following ways ().
Loudness indicates the strength of the sound, ( ) determines the size of the loudness.
TESTED 27 Apr 2024
