Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 191:

  Which of the following statements is incorrect about a BGP/MPLS IP VPN?

  A. In most cases, CEs are unaware of VPNs and do not need to support MPLS or MP- BGP.
  B. A BGP/MPLS IP VPN consists of customer edges (CEs), provider edges (PEs), and providers (Ps). PEs and Ps are carrier devices, whereas CEs are BGP/MPLS IP VPN customer devices.
  C. Inter-site communication can be implemented through VPN. A site can only belong to only one VPN.
  D. Ps only need to provide basic MPLS forwarding capabilities and do not need to maintain VPN-related information.
  C. Inter-site communication can be implemented through VPN. A site can only belong to only one VPN.

• Question 192:

  Which of the following is the drop probability of packets exceeding the upper threshold in WRED?

  A. 0.2
  B. 0.5
  C. 1
  D. 0.8
  C. 1

• Question 193:

  

  As shown in the figure, R1 and R2 establish an eBGP adjacency and enable BFD for link-failure detection. Which of the following statements is correct?

  A. R2's BFD packet detection time is 800 ms
  B. R1's BFD packet detection time is 1280 ms
  C. R1's BFD packet detection time is 660 ms
  D. R2's BFD packet detection time is 600 ms
  C. R1's BFD packet detection time is 660 ms

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• Question 194:

  With telemetry, certain data can be sampled based on specific sampling paths. Which of the following sampling paths are supported by telemetry? (Choose three)

  A. Interface statistics
  B. Information about the optical module on an interface
  C. CPU information
  D. Memory information
  A. Interface statistics
  C. CPU information
  D. Memory information

• Question 195:

  The on-premise mode is recommended for controller deployment on small and midsize campus networks.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 196:

  Which of the following actions can enable fast failure detection on multicast networks?

  A. Shorten the Holdtime of Join/Prune messages
  B. Reduce the interval at which the interface sends Hello messages
  C. Establish a PIM BFD session between neighbors
  D. Reduce the interval between sending Join/Prune messages
  B. Reduce the interval at which the interface sends Hello messages

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  Explanation

• Question 197:

  When you troubleshoot a local area network with Huawei equipment deployed, you find a large number of unicast frames with unknown source MAC addresses. The biggest danger caused by a large number of unknown-source unicast frames is:

  A. Occupies cache memory
  B. Increases the power consumption of the power supply
  C. Consumes a TCAM table entry
  D. Consumes available bandwidth
  E. Consumes the MAC address table entries available in the system
  E. Consumes the MAC address table entries available in the system

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• Question 198:

  There is a concept of FEC---Forwarding Equivalence Class---in MPLS. Which of the following criteria can FEC not be allocated based on?

  A. Application protocol
  B. Class of Service
  C. Destination address
  D. Fragment offset
  D. Fragment offset

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  Explanation

• Question 199:

  The Path Selection tool can define multiple entries. Which of the following tools will automatically generate a reject entry at the end of the list? (Choose four)

  A. Community-filter
  B. IP-prefix
  C. Route policy
  D. AS-Path-filter
  A. Community-filter
  B. IP-prefix
  C. Route policy
  D. AS-Path-filter

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  Explanation

• Question 200:

  What command can be used to prevent users from accessing multiple devices through a HUB on the switch's access port?

  A. [Huawei] interface GigabitEthernet 0/0/1 [Huawei-GigabitEthernet0/0/1] port link-type trunk [Huawei-GigabitEthernet0/0/1] port trunk allow-pass vlan 10
  B. [Huawei] interface GigabitEthernet 0/0/1 [Huawei-GigabitEthernet0/0/1] port link-type access [Huawei-GigabitEthernet0/0/1] ipsg enable
  C. [Huawei] interface GigabitEthernet 0/0/1 [Huawei-GigabitEthernet0/0/1] port link-type access [Huawei-GigabitEthernet0/0/1] port-security enable
  D. [Huawei] interface GigabitEthernet 0/0/1 [Huawei-GigabitEthernet0/0/1] port link-type access [Huawei-GigabitEthernet0/0/1] port-isolate enable
  C. [Huawei] interface GigabitEthernet 0/0/1 [Huawei-GigabitEthernet0/0/1] port link-type access [Huawei-GigabitEthernet0/0/1] port-security enable

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