Huawei H12-891_V1.0 Free Sample Exam Questions 2026

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Total Questions: 610

Questions & Answers PDF

• Question 1

  

  The following statement about RSTP root protection is correct?

  • Turning on root protection on the root port takes effect
  • The port that turns on the root protection receives the RST BDPU with a higher priority and will enter the error-down state
  • It is recommended that you turn it on on a switch that is at the edge of the network
  • After opening the root-protected port and receiving the RSTBPDU with a higher priority, if it does not continue to receive the RSTBPDU with a higher priority for a period of time, it will return to the normal forwarding state

  Reveal Answer Answer: C, D Next Question

• Question 2

  

  If multiple candidate RPs are configured in a multicast group, which of the following parameters does the RP that elect the group from multiple candidate RPs need to be compared?

  • The mask length of the group range for the C-RP service that matches the group address that the user joined
  • C-RP priority
  • The IP address of the C. C-RP interface Number of
  • C-RP interface

  Reveal Answer Answer: A, B, C Next Question

• Question 3

  

  The Layer 3 logical interface on XLAN L3 Gateway that enables communication between different VXLAN virtual networks is ?

  • Layer 2 sub-interface
  • NVE interface
  • VBDIF interface
  • VLANIF interface

  Reveal Answer Answer: C Next Question

• Question 4

  

  In the forwarding table of the switch, a MAC address can correspond to only one outlet at a time

  • True
  • False

  Reveal Answer Answer: B Next Question

• Question 5

  

  For Layer 2 VPN technology, the following statement is correct? Multi-select

  • VPLS is a widely used technology in the live network, which can provide transparent transmission of three-layer messages and achieve multi-point access.
  • The VPLS configuration is complex and the Layer 2 network transmits BUM packets.
  • BGPEVPN supports features such as tenant isolation, Multi-homing, and broadcast suppression. D. BGPEVPN addresses mac address drift and multi-tenancy that VPLS cannot support.

  Reveal Answer Answer: B, C Next Question

• Question 6

  

  IPV6 multicast introduces the concept of multicast scope, which of the following ways is the multicast scope concept implemented? Multi-select

  • When the group shake source sends IP6 multicast data, the TTL value of the packet is set to limit the transmission range of the group shake
  • There is a special field in the IPv6 multicast address that specifies the propagation range of multicast.
  • Multicast scope is just a concept of spreading scope, and there is no specific technical implementation.
  • During network configuration, the administrator uses the configuration command at the edge of the network to limit the multicast scope.

  Reveal Answer Answer: B, D Next Question

• Question 7

  

  The following statement about VXLAN gateways is incorrect

  • Layer 2 gateway: Used to solve the problem of tenant access to the VXLAN virtual network, it can also be used for subnet communication of the same VXLAN virtual network.
  • Layer 3 gateway: Used for cross-subnet communication of VXLAN virtual networks and access to external networks.
  • VXLAN Layer 3 gateways can be divided into centralized gateways and distributed gateways.
  • Layer 2 gateway and VPN instance binding.

  Reveal Answer Answer: D Next Question

• Question 8

  

  Huawei's SDN controller using VXLAN technology is fixed?

  • Agile Controller-Campus
  • Agile Controller-WAN
  • Agile Controller-DCN

  Reveal Answer Answer: C Next Question

• Question 9

  

  In EPIM-SM, the following description of the PIM Join message is correct?APIM Join messages are sent every 3 minutes, and status B. PIM Join messages for the multicast tree are only sent when the multicast tree is first established

  • The PIM Join message is sent every 60 seconds to refresh the status of the upstream router mroute for the multicast tree
  • The upstream router sends a PIM Join acknowledgment in response to each PIM Join message received from the downstream router

  Reveal Answer Answer: C Next Question

• Question 10

  

  The following is an error in the OSPF routing calculation (single choice).

  • Compared to the PRC algorithm, the ISPF algorithm only calculates the changed leaf nodes when the route changes PRC algorithm to recalculate routes
  • When the first and second class LSAs on the network change, OSPF uses the ISPF algorithm to recalculate the routes The
  • OSPF router uses the FULL SPF algorithm to calculate all nodes in the network when initially calculating routes

  Reveal Answer Answer: A Next Question

Page: 1 / 122
Total Questions: 610

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