Huawei Huawei Certifications H12-224 Questions & Answers

• Question 561:

  None Stop Forwarding (NSF) is an important high availability (HA) technology. It ensures the normal data forwarding even in the case of a fault in the control plane of the router, protecting key services on the network from interruption.

  A. True

  B. False

  Correct Answer: A

• Question 562:

  Ethernet0/0 of RTA and Ethernet0/0 of RTB connect to the same LAN, both are enabled with VRRP. Create a virtual router with ID 1 and virtual IP address 10.1.1.254. Which of the following commands can make RTB Master without modifying the priority of RTA?

  A. [RTB-Ethernet0/0]vrrpvrid 1 priority 200

  B. [RTB-Ethernet0/0]vrrpvrid 1 virtual-ip 10.1.1.254 priority 200

  C. [RTB-Ethernet0/0]vrrpvrid 1 force-master

  D. [RTB]vrrpvrid 1 force-master

  Correct Answer: A

• Question 563:

  A VRRP backup group is able to track the status of an interface. If the interface configured with a VRRP backup group fails or any interface on the router fails, the VRRP backup group provides a backup for the faulty interface.

  A. True

  B. False

  Correct Answer: A

• Question 564:

  What is the legal virtual MAC address in VRRP?

  A. 01-01-5E-00-01-01

  B. 01-00-5E-00-01-00

  C. 00-00-5E-00-01-01

  D. 01-01-5E-00-00-01

  Correct Answer: C

• Question 565:

  Simple traffic classification can be performed based on which of the following information in IPv4 packets? (Choose two.)

  A. DSCP

  B. IP precedence

  C. EXP

  D. 802.1p

  Correct Answer: AB

• Question 566:

  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 responds to the ARP requests sent from a virtual IP address.

  C. It discards 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: ACD

• Question 567:

  The formula for calculating the MTTR is: MTTR = Fault detection time + Board replacement time + System initialization time + Link recovery time + Route convergence time + Forwarding recovery time. The smaller the addends are, the smaller the MTTR is and the higher the device availability is.

  A. True

  B. False

  Correct Answer: A

• Question 568:

  Which of the following is not the BFD fault detection mode?

  A. Asynchronous mode

  B. Demand mode

  C. Echo mode

  D. Peer mode

  Correct Answer: D

• Question 569:

  Which of the following statements about the mVRRP backup group are true? (Choose three.)

  

  A. An mVRRP backup group can be bound to other service VRRP backup groups.

  B. An mVRRP backup group cannot be bound to multiple service VRRP backup groups but can function as a service VRRP group to be bound to another mVRRP group.

  C. After a VRRP backup group member is bound to an mVRRP backup group, the state machine of the VRRP backup group member becomes dependent. That is, the VRRP backup group member deletes the protocol timer, and no longer sends or receives packets, and implements its state machine by directly copying the status of the mVRRP backup group.

  D. A VRRP backup group member can be bound to only one mVRRP backup group.

  Correct Answer: ACD

• Question 570:

  Which of the following congestion avoidance mechanisms can be used to avoid global TCP synchronization? (Choose two.)

  A. RED

  B. WRED

  C. FIFO

  D. WFQ

  Correct Answer: AB