Huawei Huawei Certifications H12-224 Questions & Answers

• Question 551:

  Which of the following statements about the jitter and delay are true? (Choose three.)

  A. The end-to-end delay is the sum of transmission delays, processing delays, and queuing delays along the packet forwarding path.

  B. The variation in packet delay is called jitter.

  C. The jitter depends on the delay. The lower the delay, the less the jitter.

  D. The jitter is independent of the delay.

  Correct Answer: ABC

• Question 552:

  Assume that congestion occurs on the outbound interface, packet A is cached in the PQ, and packet B is cached in the WFQ, which of the following statement about packet scheduling is true?

  A. Packet A is scheduled first.

  B. Packet B is scheduled first.

  C. Packets A and B are scheduled at the same time.

  D. Packets A and B are discarded.

  Correct Answer: A

• Question 553:

  Which of the following are disadvantages of the traditional tail drop mechanism? (Choose three.)

  A. TCP global synchronization

  B. TCP starvation

  C. High Average Link Utilization

  D. Packet drop is not based on priorities

  Correct Answer: ABD

• Question 554:

  QoS can provide different quality of service according to different demands, which of the following are functions of QoS? (Choose three.)

  A. Providing private bandwidth for users

  B. Reducing cost of the network

  C. Congestion management and avoidance

  D. Specifying priority of packets

  Correct Answer: ACD

• Question 555:

  Which of the following statements about the VRRP authentication is false?

  A. VRRP provides no authentication.

  B. VRRP provides the simple text authentication.

  C. VRRP provides the MD5 authentication.

  D. VRRP provides the RSA key authentication.

  Correct Answer: D

• Question 556:

  Which of the following statements about the mVRRP backup group is false?

  

  A. Multiple service VRRP backup group can be bound to one mVRRP backup group.

  B. An mVRRP backup group can serve as a service VRRP backup group and thus be bound to another mVRRP backup group.

  C. One service VRRP backup group can be bound to only one mVRRP backup group.

  D. After multiple service VRRP backup groups are bound to an mVRRP backup group, the mVRRP backup group determines the status of all the service VRRP backup groups by sending VRRP packets. This can reduce the number of VRRP packets to be sent and improve the packet processing efficiency.

  Correct Answer: B

• Question 557:

  Which of the following information in a packet can be marked or re-marked?

  A. IP DSCP, IP precedence, and 802.1p information

  B. IP source and destination addresses

  C. MAC address

  D. Any information in the packet

  Correct Answer: A

• Question 558:

  Congestion occurs when a link or node is carrying so much data that its quality of service deteriorates.

  A. True

  B. False

  Correct Answer: A

• Question 559:

  If the Open message sent from a BGP speaker has the GR capability field but no field, the BGP speaker has no backup forwarding table. Such a BGP speaker functions as only the GR helper to help its neighbors complete the GR process.

  A. True

  B. False

  Correct Answer: A

• Question 560:

  The NSF function takes effect only after the GR function is enabled on two directly connected routers that use static routes for communication between users in different network segments.

  A. True

  B. False

  Correct Answer: B