Huawei H11-879 Online Practice Questions and Exam Preparation

Huawei H11-879 Online Questions & Answers

• Question 21:

  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. 83.6
  B. 76.6
  C. 90.4
  D. 80
  D. 80

• Question 22:

  In the SIP session service, which of the following methods is used by the called terminal to realize the interaction of media capabilities? () (single choice)

  A. In the 100 trying message, carry the called SDP media capability
  B. In the 180 or 183 session progress message, carry the called SDP media capability
  C. In the 200 OK message, the called SDP media capability is carried
  D. Confirm in the ACK message
  C. In the 200 OK message, the called SDP media capability is carried

• Question 23:

  In the U1900 series unified gateways, what is the correct statement about the prefix? ()

  A. The prefix is divided into intra-office prefix and outgoing prefix
  B. Intra-office prefix refers to the prefix used when dialing between different extensions of the same company
  C. Since prefix 28 includes prefix 289, the system performs the called number according to the maximum matching principle Analysis, the call with the called number 28901111 should choose prefix 28
  D. The prefix must correspond to the office route selection code
  A. The prefix is divided into intra-office prefix and outgoing prefix
  B. Intra-office prefix refers to the prefix used when dialing between different extensions of the same company

• Question 24:

  The U1900 system is connected to the PSTN through a digital trunk. In U1900, phone A cannot call user B's On mobile phone, user B can call back phone A normally. Which of the following reasons may cause this failure? () (single choice)

  A. The digital trunk connection between U1900 and PSTN is faulty.
  B. Phone A is not registered properly.
  C. Phone A outbound call permission restriction
  D. Phone A has been added to the system's blacklist of called parties
  C. Phone A outbound call permission restriction

• Question 25:

  The human eye is more sensitive to brightness than to color. () Correct or Wrong

  A. Correct
  B. Wrong
  A. Correct

• Question 26:

  Regarding Huawei Videoconferencing VME technology, which of the following descriptions is correct: () (multiple choice)

  A. It can improve image compression ratio and save bandwidth
  B. Optimize the image processing of the active area to increase the clarity
  C. Optimize the graphics in the static area to increase the clarity
  D. VME's frame doubling technology can improve the smoothness of images
  A. It can improve image compression ratio and save bandwidth
  B. Optimize the image processing of the active area to increase the clarity
  D. VME's frame doubling technology can improve the smoothness of images

• Question 27:

  When performing a key-in operation, the meeting list displayed on the terminal is based on what is found ()

  A. All scheduled meetings on SMC
  B. All meeting templates on SMC
  C. All active meetings on SMC
  D. All scheduled conferences on the SMC that include the terminal site
  D. All scheduled conferences on the SMC that include the terminal site

• Question 28:

  In the VoIP system, what are the factors that affect the quality of voice calls () (multiple choice)

  A. Jitter
  B. delay
  C. Packet loss
  D. bandwidth
  A. Jitter
  B. delay
  C. Packet loss
  D. bandwidth

• Question 29:

  An enterprise has purchased 3 U1960s, and the number of IP phone users is about 2500. Which networking method is suitable for these 3 U1960s? () (single choice)

  A. Multi-node centralized call management networking
  B. Peer-to-peer distributed call management networking
  C. Convergent Distributed Call Management Network
  B. Peer-to-peer distributed call management networking

• Question 30:

  The terminal number or name needs to be protected in the SMC2.0 system to avoid accidental modification. The most appropriate method is () (single choice)

  A. Configuration template
  B. Configuration lock
  C. Use unmanageable device
  D. Modify terminal password regularly
  B. Configuration lock