Huawei Huawei Certifications H12-224 Questions & Answers

• Question 281:

  What are the differences between the IGMP versions? (Choose two.)

  A. IGMPv1/v2 cannot elect queriers but IGMPv3 can.

  B. In IGMPv2/v3, members can actively leave groups, whereas in IGMPv1 members cannot actively leave groups.

  C. IGMPv1/v2 do not support the SSM model but IGMPv3 supports.

  D. IGMPv1/v2 do not support group-specific Query messages but IGMPv3 supports.

  Correct Answer: BC

• Question 282:

  What are the functions of an IGMPv2 Query message? (Choose three.)

  A. A router sends IGMPv2 Query messages to collect group memberships of receiver hosts.

  B. A router sends IGMPv2 Query messages to elect a querier.

  C. If a router can periodically send IGMPv2 Query messages, it indicates that the router runs properly.

  D. Based on IGMPv2 Query messages, receiver hosts can obtain the address of a querier and unicast Report messages to the querier.

  Correct Answer: ABC

• Question 283:

  How many hosts are available per subnet if you apply a /21 mask to the class B network?

  A. 510

  B. 512

  C. 1022

  D. 2046

  Correct Answer: D

• Question 284:

  Which of the following route selection mechanisms can adopt user-defined policies to determine data forwarding paths flexibly based on ACLs or packet lengths?

  A. AS-path-filter

  B. IP-prefix

  C. Route-policy

  D. Policy-based-route

  Correct Answer: D

• Question 285:

  An IP network can provide various packet forwarding services. Users are concerned about which of the following during packet forwarding? (Choose three.)

  A. Throughput

  B. Delay

  C. Cost

  D. Loss of packet

  Correct Answer: ABD

• Question 286:

  Which of the following attacks are prevented after an IP address and MAC address are bound on the USG? (Choose two.)

  A. IP address spoofing

  B. MAC address spoofing

  C. DoS attack

  D. DDoS attack

  Correct Answer: AB

• Question 287:

  What are the functions of route filtering? (Choose three.)

  A. Avoids sub-optimal routes generated in route importing.

  B. Avoids routing loops.

  C. Affects route selection by changing route attributes.

  D. Implements accurate route importing and controls route advertisement.

  Correct Answer: ABD

• Question 288:

  The preceding information is generated after a router receives a Report message from group 225.0.0.1 through Ethernet 6/1/0.

  

  Which type of Report message will not be processed by the router?

  A. IS_IN

  B. ALLOW

  C. BLOCK

  D. TO_IN

  Correct Answer: C

• Question 289:

  Which of the following statements about the Reverse Path Forwarding (RPF) mechanism are true? (Choose two.)

  A. Multicast RPF does not depend on unicast routing.

  B. All multicast protocols adopt the RPF mechanism.

  C. A router discards the received multicast packets if the packets fail the RPF check.

  D. The RPF mechanism has two functions: 1. It prevents multicast routing loops; 2. It avoids forwarding redundant multicast data packets.

  Correct Answer: CD

• Question 290:

  OSPF supports two authentication modes: area authentication and interface authentication. These two modes cannot be configured at the same time.

  A. TRUE

  B. FALSE

  Correct Answer: B