Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 81:

  On the network shown in the figure, OSPF-based SR-MPLS TE is enabled on all routers. Which of the following adjacency labels are allocated by P3? (Choose two)

  A. 9006
  B. 9002
  C. 9003
  D. 9005
  B. 9002
  C. 9003

• Question 82:

  Which of the following parameters is not included in an IPsec security association (SA)?

  A. Security parameter index (SPI)
  B. Destination IP address
  C. Security protocol ID (AH or ESP)
  D. Source IP address
  D. Source IP address

• Question 83:

  By default, the domain ID of an OSPF process is the same as the process ID. You can run the domain-id command in the OSPF process view to change a domain ID.

  A. TRUE
  B. FALSE
  B. FALSE

• Question 84:

  According to the following information displayed on a router, which of the following are the causes of the failure to establish an OSPF adjacency? (Choose two)

  OSPF error statistics:

  1 : Hello timer mismatch

  0 : Netmask mismatch

  0 : Bad checksum

  0 : Bad authentication type

  0 : Unknown neighbor

  0 : Extern option mismatch

  A. Hello packets are sent at different intervals.
  B. The area IDs are inconsistent.
  C. The IP address masks of the interfaces are inconsistent.
  D. The area types are inconsistent.
  A. Hello packets are sent at different intervals.
  B. The area IDs are inconsistent.

• Question 85:

  In MPLS VPN, in order to distinguish between IPv4 prefixes that use the same address space, the RD value is added to the IPv4 address. The following options are described correctly as:

  A. RD can be used to control the publication of VPN routing information.
  B. On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device
  C. RD is encapsulated in the Update message as an extended community attribute of BGP during delivery
  D. After the PE receives an IPv4 route from CE, it adds an RD to the route to IPv4 that translates to a globally unique VPN-IPv4 route and publishes it on the public network
  B. On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device

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• Question 86:

  In an MSTP environment, MSTP switches treat RSTP switches as a single MSTP domain. When MSTP is formed by a single switch, it translates RST BPDU into MST BPDU with the IRPC set to 0.

  A. True
  B. False
  A. True

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  Explanation

• Question 87:

  If a switch is running RSTP, which interface on that switch sends the BPDU with the Proposal logo?

  A. The designated port
  B. The designated port in a non-forwarding state
  C. Alternate port
  D. The root port in the Blocking state
  B. The designated port in a non-forwarding state

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• Question 88:

  Refer to the output information of a device below. According to the information, which of the following MPLS labels is carried in a data packet forwarded by the device to 10.0.1.1?

  A. 36100
  B. 36200
  C. 40100
  D. 40200
  A. 36100

• Question 89:

  What is the field in the IPv6 header that is similar to the IPv4 header's "Type of Service" field?

  A. Version
  B. Flow Label
  C. Next Header
  D. Traffic Class
  D. Traffic Class

• Question 90:

  XLAN uses BGP EVPN to establish a tunnel, what type of message is used?

  A. Typel
  B. Type2
  C. Type3
  D. Type4
  E. Type5
  C. Type3

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  Explanation