Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 431:

  On an SR-MPLS network, manually configured prefix SIDs on different devices may conflict with each other. Assume that there are four routes (prefix/mask SID) as follows. Which of the following routes will be selected according to the conflict handling principle?

  A. 1.1.1.1/32 SID 2
  B. 1.1.1.1/32 SID 1
  C. 2.2.2.2/32 SID 3
  D. 3.3.3.3/32 SID 1
  D. 3.3.3.3/32 SID 1

• Question 432:

  MACsec provides users with secure MAC layer data sending and receiving services. Which of the following is not a service provided by MACsec?

  A. User data encryption
  B. Data source authenticity verification
  C. Integrity check
  D. Controllability check
  D. Controllability check

• Question 433:

  Which of the following statements about SR-MPLS Policy candidate paths are correct? (Choose four)

  A. A candidate path can contain multiple segment lists, with each segment list carrying the weight attribute.
  B. Load balancing can be implemented among candidate paths and among segment lists.
  C. An SR-MPLS policy can contain multiple candidate paths with the preference attribute.
  D. The valid candidate path with the highest preference functions as the primary path of the SR-MPLS Policy.
  A. A candidate path can contain multiple segment lists, with each segment list carrying the weight attribute.
  B. Load balancing can be implemented among candidate paths and among segment lists.
  C. An SR-MPLS policy can contain multiple candidate paths with the preference attribute.
  D. The valid candidate path with the highest preference functions as the primary path of the SR-MPLS Policy.

• Question 434:

  Regarding BGP MED, which of the following descriptions is correct? (Choose three)

  A. In the BGP routing rules, MED has a lower priority than AS Path, Preferred-value, Local-Preference, etc., and Origin.
  B. The default value for the BGP routing MED is 0.
  C. By default, if there is no MED value in the route attribute, it is processed as 0. If the bestpath med-none-as-maximum command is configured, MED is processed as the maximum value, 4294967295.
  D. By default, BGP routing rules can compare MED for routes from different autonomous systems.
  A. In the BGP routing rules, MED has a lower priority than AS Path, Preferred-value, Local-Preference, etc., and Origin.
  B. The default value for the BGP routing MED is 0.
  C. By default, if there is no MED value in the route attribute, it is processed as 0. If the bestpath med-none-as-maximum command is configured, MED is processed as the maximum value, 4294967295.

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• Question 435:

  FILL IN THE BLANK

  The figure shows an SRv6 (Segment Routing over IPv6) packet. If the Destination Address field in the IPv6 basic header is FC04::4, the value of the SL (Segments Left) field in the SRv6 header should be _____. (Enter only digits.)

  

  1

• Question 436:

  OSPF is deployed on a campus network to implement network interconnection. An engineer configures R2 as shown in the figure. Which of the following statements is incorrect about LSAs on the OSPF network?

  

  A. Type 5 LSAs are flooded in Area 1.
  B. Type 3 LSAs are not flooded in Area 1.
  C. Type 3 LSAs are not flooded in Area 2.
  D. Type 5 LSAs are flooded in Area 2.
  A. Type 5 LSAs are flooded in Area 1.

• Question 437:

  Based on the following output, which of the following statements are correct?

  tracert 172.17.1.5

  1 10.1.12.2 40 ms 10 ms 10 ms

  2 10.1.24.2 30 ms 20 ms 20 ms

  3 10.1.34.1 20 ms 20 ms 20 ms

  4 10.1.13.1 20 ms 20 ms 10 ms

  5 10.1.12.2 20 ms 30 ms 20 ms

  6 10.1.24.2 30 ms 30 ms 30 ms

  7 10.1.34.1 50 ms 40 ms 40 ms

  8 10.1.13.1 20 ms 30 ms 30 ms

  A. R1 does not have a route to 172.17.1.5.
  B. R1 has a route to 172.17.1.5.
  C. The path for R1 to access 172.17.1.5 is normal.
  D. A loop occurs when R1 accesses 172.17.1.5.
  D. A loop occurs when R1 accesses 172.17.1.5.

• Question 438:

  When configuring source NAT without PAT parameters, which of the following statements is true?

  A. Performs destination IP address and destination port translation
  B. Only source IP address translation occurs
  C. Only destination IP address translation occurs
  D. Performs source IP address and source port translation
  B. Only source IP address translation occurs

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• Question 439:

  At the NETCONF content layer, the operation may contain an operation attribute, which is used to specify an operation type for configuration data. Which of the following operation attributes are supported? (Choose three)

  A. create: The configuration data identified by the element that contains this attribute is added to the configuration datastore only if the configuration data does not already exist in the configuration datastore. If it already exists in the configuration datastore, with the value being data-exists is returned.
  B. delete: The configuration data identified by the element that contains this attribute is deleted from the configuration datastore. If the configuration data does not exist in the configuration datastore, a deletion success message is returned.
  C. merge: The configuration data identified by the element that contains this attribute is modified if the configuration data already exists in the configuration datastore. If not, the configuration data is created in the datastore.
  D. remove: The configuration data identified by the element that contains this attribute is deleted from the configuration datastore. If the configuration data does not exist in the configuration datastore, a deletion success message is returned.
  A. create: The configuration data identified by the element that contains this attribute is added to the configuration datastore only if the configuration data does not already exist in the configuration datastore. If it already exists in the configuration datastore, with the value being data-exists is returned.
  B. delete: The configuration data identified by the element that contains this attribute is deleted from the configuration datastore. If the configuration data does not exist in the configuration datastore, a deletion success message is returned.
  C. merge: The configuration data identified by the element that contains this attribute is modified if the configuration data already exists in the configuration datastore. If not, the configuration data is created in the datastore.

• Question 440:

  In the use of the LACP (Link Aggregation Control Protocol), which of the following descriptions is correct?

  A. The Eth-Trunk interface can avoid frequent oscillations with the command: interface eth-trunk llacp preempt enable lacp preempt delay delay-time.
  B. Source address-based load sharing in an enabled link aggregation group can be configured with the command: interface eth-trunk 110 ad-balance src-dst-ip.
  C. A member interface can be removed from an enabled link aggregation group with the commands: interface GigabitEthernet0/0/1 shutdown, interface GigabitEthernet0/0/1 undo eth-trunk 1, interface GigabitEthernet0/0/1 undo shutdown.
  D. A member interface can be joined in the link aggregation group by enabling the following command: interface GigabitEthernet0/0/1 shutdown, interface GigabitEthernet0/0/1 trunkport.
  A. The Eth-Trunk interface can avoid frequent oscillations with the command: interface eth-trunk llacp preempt enable lacp preempt delay delay-time.

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  Explanation