Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 201:

  As shown in the figure, all routers run OSPF, which of the following statements is correct?

  

  A. Both R2 and Area 0 generate Router LSA
  B. R2 generates Router LSA only in Area 0
  C. R2 forwards the R1-generated Router LSA to R3
  D. R2 forwards the R3-generated Router LSA to R1
  A. Both R2 and Area 0 generate Router LSA

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• Question 202:

  What is the exact description of the SSM features?

  A. Using SSM, the receiver can use INCLUDE in IGMPv3 to indicate the source
  B. SSM is an extension of the DVMP protocol to efficiently transmit one-to-many communication traffic
  C. SSM requires MSDP to discover active sources in other PIM domains
  D. Routing multicast traffic in SSM is done by relying on the number of sources, and the RP is used for the receiver to learn the corresponding sources
  A. Using SSM, the receiver can use INCLUDE in IGMPv3 to indicate the source

• Question 203:

  There are three port roles defined in RSTP, with alternative ports and backup ports flagged in STP messages. The port role values within these fields are consistent, all of which are 01.

  A. TRUE B. FALSE
  A. TRUE B. FALSE

• Question 204:

  Which of the following description about the differences between IGMP versions is correct? (Choose two)

  A. IGMPv1/v2 cannot elect the querier themselves, while IGMPv3 can
  B. IGMPv1 does not support specific group queries, while IGMPv2 does
  C. IGMPv1/2/3 cannot support the SSM model
  D. For members leaving a group, IGMPv2/v3 can leave actively, while IGMPv1 cannot
  B. IGMPv1 does not support specific group queries, while IGMPv2 does
  D. For members leaving a group, IGMPv2/v3 can leave actively, while IGMPv1 cannot

• Question 205:

  Mainstream Layer 2 technologies include VXLAN, TRILL, NVGRE, and MPLS.

  A. True
  B. False
  A. True

• Question 206:

  If the OSPF protocol is running in the network, after configuring the non-backbone area in the OSPF area as the Totally Stub area, the ABR router sends a message to the Totally Stub area. The ABR issues an LSA with an LS ID of 0000. What type of LSA is the LSA?

  A. LSA 5
  B. LSA 2
  C. LSA 1
  D. LSA 3
  D. LSA 3

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• Question 207:

  In a shared network, what mechanism does PIM-SM use to prevent duplicate traffic?

  A. Register mechanism
  B. BSR/RP mechanism
  C. Assert mechanism
  D. Join/Prune mechanism
  C. Assert mechanism

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• Question 208:

  Which of the following descriptions about process of sending and receiving data frames in switch interface Access mode is correct?

  A. In Access mode, labeled data frames are discarded directly when they are received.
  B. Access mode strips off the VLAN tag of the data frame when sending.
  C. Access mode receives only unlabeled data frames.
  D. When a data frame enters the switch interface, the switch learns the destination MAC address in the data frame.
  B. Access mode strips off the VLAN tag of the data frame when sending.

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  Explanation

• Question 209:

  As shown in the figure, which of the following options satisfies two routers establishing an IS-IS neighbor?

  

  A. Both routers are of the Level-1 type.
  B. Both routers remain of the default type.
  C. One router can be of the Level-1-2 type and the other of the Level-1 type.
  D. The IS-IS process numbers of the two routers must be consistent.
  B. Both routers remain of the default type.

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• Question 210:

  Which of the following statements about IPSG is incorrect?

  A. IPSG can be used to check the validity of IP packets. If IP packets are invalid, the device reports an alarm to an NMS.
  B. IPSG is a source IP address filtering technology based on Layer 3 interfaces.
  C. IPSG can be used to prevent hosts from changing IP addresses.
  D. IPSG can defend against IP address spoofing attacks.
  A. IPSG can be used to check the validity of IP packets. If IP packets are invalid, the device reports an alarm to an NMS.