Huawei Huawei Certifications H12-224 Questions & Answers

• Question 611:

  Which of the following statements are correct regarding MAC address of VRRP packet? (Choose two.)

  

  A. The destination MAC is broadcast MAC address.

  B. The destination MAC is multicast MAC address.

  C. The source address is virtual MAC address.

  D. The source address is physical MAC address of Master.

  Correct Answer: BC

• Question 612:

  Which of the following statements about the refreshing mechanism in the case of link switchover in a Smart Link group is false?

  A. MAC and ARP entries are refreshed automatically against traffic.

  B. The Smart Link group uses a new link to send Flush packets.

  C. When the active link recovers from a fault, Flush packets are sent to refresh entries.

  D. When recovering from a fault, the active link remains blocked and traffic is not switched back to it. In this way, traffic keeps stable.

  Correct Answer: C

• Question 613:

  Assume that the WRED policy for packets with the priority of AF21 is that the length of the queue for saving packets ranges from 35 to 40, and the discarding percentage is 50%. When a packet with the priority being AF21 arrives, which of the following statements are true? (Choose three.)

  A. If the average length of the queue is smaller than 35, the packet is added to the queue.

  B. If the length of the queue ranges between 35 and 40, the packet may be discarded with a possibility of 50%.

  C. If the average length of the queue is greater than 40, the packet is added to the queue.

  D. If the average length of the queue is greater than 40, the packet is discarded.

  Correct Answer: ABD

• Question 614:

  Which of the following PHB types are defined in IETF DiffServ? (Choose three.)

  A. Default PH

  B. Class-Selector PHB

  C. Fast Forwarding PHB

  D. Assured Forwarding PHB

  Correct Answer: ABD

• Question 615:

  Which of the following statements are correct regarding the function of VRRP?

  A. VRRP can improve the reliability of default gateway.

  B. VRRP increase the convergence speed of routing protocol.

  C. VRRP is mainly used for traffic balance.

  D. VRRP can provide one default gateway for different network segments, it simplifies the gateway configuration for PC.

  Correct Answer: A

• Question 616:

  Which of the following statements are correct regarding priority in VRRP?

  A. The IP address owner always uses 255 as its priority regardless its config priority.

  B. The IP address owner always uses 0 as its priority regardless its config priority.

  C. We can configure the priority as 0 to make the router never attend the Master election.

  D. If a VRRP router changes from Master to Slave, it will send out a VRRP message with priority 0 in the network.

  Correct Answer: A

• Question 617:

  Which of the following statements about a backup router in a VRRP backup group are true? (Choose three.)

  A. It receives VRRP packets from the master router and determines whether the master router is functioning properly.

  B. It does not respond to the ARP requests sent from a virtual IP address.

  C. It forwards an IP packet whose destination MAC address is a virtual MAC address.

  D. It discards an IP packet whose destination IP address is a virtual IP address.

  Correct Answer: ABD

• Question 618:

  Most fields in IP headers of packets in the same data flow are identical. You can compress these fields to improve the link transmission efficiency.

  A. True

  B. False

  Correct Answer: A

• Question 619:

  In DiffServ mode, before the application program sends packets, it needs to confirm that the network has reserved resources for packet transmission.

  A. True

  B. False

  Correct Answer: B

• Question 620:

  The Eudemon generates a blacklist upon detecting an attack.

  A. True

  B. False

  Correct Answer: A