Huawei Huawei Certifications H12-821 Questions & Answers

• Question 21:

  Which of the following statements regarding different LSA types is false?

  A. LS Request packets contain only LS Type, LS ID, and Advertising Router.

  B. LS Ack packets contain complete LSA information.

  C. DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.

  D. LS Update packets contain complete LSA information.

  Correct Answer: D

• Question 22:

  Which of the following routing protocols support the default route through command configuration?

  A. BGP

  B. IS-IS

  C. OSPF

  D. ICMP

  Correct Answer: A

• Question 23:

  Preferences of routing protocols determine the sequence In which a router selects a route among routes to the same destination /earned through different routing protocols.

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 24:

  Which of the following configurations are not mandatory when an administrator configures VRRP?

  A. Preemption mode

  B. Preemption delay

  C. Virtual router priority

  D. Virtual IP address

  Correct Answer: D

• Question 25:

  Which of the following attacks is not the network layer attack?

  A. IP spoofing attack

  B. ICMP attack

  C. Smurf attack

  D. ARP spoofing attack

  Correct Answer: D

• Question 26:

  IGMPV3 not only supports IGMPv1 General Query and IGMPv2 Group-Specific Query, and also IGMPv3 Source/Group-Specific Query.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 27:

  Four routers run ISIS and have established adjacencies. The area IDs and router levels are marked in the following figure. If route leaking is configured on R3, which of the following is the cost of the route from R4 to 10.0.2.2/32?

  

  A. 80

  B. 50

  C. 40

  D. 30

  Correct Answer: B

• Question 28:

  Which of the following statements about multicast packet forwarding is true?

  A. If a multicast data packet fails the RPF check, the packet must have been received through a sub-optimal interface. However, this interface still receives and forwards the multicast traffic downstream.

  B. IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network.

  C. The source address of a multicast packet is a unicast address.

  D. In multicast transmission, the destination address of a packet can be the unicast address of a host.

  Correct Answer: A

• Question 29:

  Which of the following statements about the forwarding plane of a switch is false?

  A. Provides high-speed and non-blocking data channels.

  B. Can encapsulate and decapsulate packets.

  C. Can collect packet statistics.

  D. Consists of main control boards and interface boards.

  Correct Answer: C

• Question 30:

  Which of the following statements regarding IGMPv1 and IGMPv2 are true?

  A. 1GMPv2 supports only general query.

  B. 1GMPv2 defines the Leave message type.

  C. IGMPv1 does not define the IGMP Leave message type.

  D. IGMPv1 supports general query.

  Correct Answer: D