HCIP-Video Conference V2.0 Questions and Answers
In video conferencing, local noise is required not to be greater than ().
The SIP protocol's flexible scaling mechanism refers to the addition of header domains and message types.
In audio encoding, which of the following is a speech quality metric. () (3 answers).
For the SDP protocol, the m line, also known as the media line, describes information such as the type of media supported by the sender, where the second parameter is ( ).
Under static NAT networking, the signaling description of the public network terminal calling the private network terminal is correctly ( ).
The following description of the advantages and disadvantages of forward error correction FEC is correctly ( )o
In video conferencing, the empty field noise is required not to be greater than ( ).
According to the H.323 protocol, a message sent by the caller to the caller indicates which message ( ) the called user has off-hooked.
MP mainly completes which of the following functions. ( )
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
HD terminals support peer-to-peer () calling. (3 answers).
In VR scenarios, the terminal cannot join the meeting ( ) in one of the following ways.
Video conferencing requires a color rendering index greater than ( ) for light sources
When the endpoint/MCU calls with a number, the ARQ call information does not contain any of the following ( ).
Which of the following features does the gatekeeper provide (3 answers).
During a point-to-point number call, the terminal ends up getting a ( ) of the peer terminal from GK to make the call.
The compression encoding of audio signals can be divided into ( ).
Under static NAT networking, the SRC address of the terminal under the private network changes to ().
The terminal reads the camera data by ( ).
The advantages of static NAT include. ( )
RRQ registers with GK with registration information ( ).
Common SIP calls to the SDP negotiation process include ( ).
The following description of HD terminals is correct ( ).
H.460 Signaling Interoperability Scheme ( ).
Which of the following signaling messages are capable of exchanging?
In the Early state, the caller can terminate the dialog by sending (). (2 answers).
The gatekeeper rejects the access authentication, address resolution request, and gives the resolution result, which of the following signaling can achieve this function
H.460 Signaling interoperability scheme ( ).
In 230.H.460 networking, what protocol does the tunnel between the terminal and the client GK follow? ()
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 ( ).
The color rendering index affects the reproducibility of the image, and when the color rendering index is low, the color of the image will deviate greatly from the original image. ( )
SIP is an application layer protocol that is independent of the transport layer protocols below and can be hosted on different transport protocols, such as UDP/TCP/TLS/SCTP, currently Most commonly used
TCP. ( )
In video conferencing, the empty field noise is required not to be greater than ( )dB. (Fill in the blanks)
Wireshark is a network packet analysis tool whose main role is to capture network packets in real time on the interface and display the detailed protocol information of the packets in detail. ( )
In an RTP packet, the initial value of the Sequence number is random, no RTP packet is sent, and the sequence number is incremented. The receiver detects packet loss and rebuilds packets based on it.
Forward error correction FEC, when both parties establish a call and detect more than 0.1% of the media stream loss within 10s, the super error correction function is enabled , super loan correction
function, will be a part of the call bandwidth, used to transmit anti-packet loss of redundant code stream. ( )
In the MCU's web page, the format of the exported address book information is ( ). (Fill in the blanks)
Dialogs can be divided into INVITE transactions and non-INVITE transactions, where the INVITE transaction in turn includes a request message and a response message.
Color rendering index refers to the object with the light source illumination and with a standard light source illumination, the degree of its color compliance of the degree of measurement, the smaller the
value indicates the higher degree of conformity. ( )
CANEL transactions can be used for both CANCEL INVITE transactions and CANCEL non-INVITE transactions.
To use NLOG properly, the FLASH plug-in must be installed or it cannot be used.
An MCU can belong to only one service area, but a service area can have multiple MCUs.
As Huawei's video service management platform, SMC platform manages and schedules video conferencing in a unified manner. It can realize all the meeting control operations in the video conference, and can provide customers with a convenient and fast conference management experience.
GK's active-standby inversion is coordinated by a heartbeat connection.
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)
In the specification for RTP (RFC 3550), a total of () RTCP reports are defined as used to report current control information. (Fill in the blanks)
In MCU ride-on-the-wall mode, you can configure IP routing to send and receive data through GE1.
At the end of the meeting, the recording server returns the recording address to the SMC, and the SMC emails the user to watch on demand.
In the Cseq header domain, Cseq is used to uniquely identify an invitation or a registration. ( )
During point-to-point calls under different GKs, LRQ uses GK routing prefixes to query neighbor GK for information about the called node.
The H.323 six-step call process applies to all H.323 nodes.
During a point-to-point number call, the called terminal does not send a call request to GK until it receives setup signaling.
MSDR is the master-slave decision to reject the message, the ability to exchange results that are inconsistent with the settings of this end, then reply to MSDR. ( )
Network Address Translation (NAT) is used to enable translation between private network addresses and public network locations.
The wall riding scheme is a simple public and private network crossing method, which connects different network ports of the MCU in different networks to realize the terminals in different networks to access
the same conference.
The mcu wall riding mode requires modifications to the firewall in the original network ( such as open ports ).
Ways to improve architectural acoustics include ( ). (Select 3 answers).
A meeting can support up to ( ) group multi-screen. (Fill in the blanks)
MsDA is the master-slave decision response message, which carries the Master or Slave flag, which refers to the state of the local side.
Huawei NLOG software is part of the conference scheduling and management software, and is installed and used together with the SMC conference management software. ( )
The veneer slot information of the VP9660 is shown in the following:
Multicast is a networking technique that allows one or more senders (multicast sources) to send a single packet to multiple receivers (once, simultaneously).
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.
The test can display 7 color bars on the screen to detect the effect of the picture output.
Which of the following endpoints does not have MiniMCU functionality?
The gateway in 502.H. 323 is between a circuit-switched network and a packet-switched network. ( )
Which of the following protocol messages does Wireshark support decoding?
Small A found that the image is not clear and the overall image is dark when holding a video conference, please analyze it in combination with the optical principles of video conference construction, which of the following is the most likely cause?
Shown in the figure is an example of a message in the RTCP protocol ( ).
Which of the following devices does NLOG V2's data come from?
Which of the following RSE6500 ether ports is the one that provides recording and broadcasting services?
networking network, the H.245TCP connection of the private network terminal is established with TS. ()
PCM coding mainly includes three processes: sampling, quantization, and coding.
RFC2190 defines a total of 3 load heads for the H.263 video codec format: mode A and mode B and mode C/A mode is the recommended and commonly used transmission mode. ()
The following description of SIP registration, which one is wrong?
The following description of the standalone SC ride wall networking configuration, which one is wrong?
Which of the following is the core specification of the SIP protocol?
The SIP protocol is an application-layer protocol.
The H323 protocol ends up with the number 3 denoting ( ).
Cascade channel usage rules are consumed by priority, and resources are mutually exclusive when at the same priority.
What are the following ways to improve building acoustics?
gateway is a node that provides real-time two-way traffic between the H.323 terminal on the SCN and other nodes on the PBN.
Which of the following protocols is a dual-stream protocol in the H.323 protocol stack?
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?
The following description of the relationship between the RTCP port number and the RTP port number is correct ().
is a general multimedia communication control protocol, mainly for conference communication design, H.323 system using H.245 protocol as a control protocol, for the establishment, maintenance and release of control channels.
Dark-toned tablecloths are recommended to increase reflective astigmatism to keep attendees' faces (jaws) shiny.
is the unified identity used by the recording server to register with the SIP server and needs to be consistent with the configuration on SMC2.0. (Abbreviations).
Capability Negotiation is primarily used to declare the ability to receive and send supported by this side. Declare the preferred capability set at this end, and the other party needs to prioritize the use of this capability set.
