Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 541:

  Both the CSNP packet of IS-IS and the DD packet of OSPF function on MA networks and describe the link-state database summary. Comparing the characteristics of these two types of messages, which statement is correct?

  A. Both packets must be acknowledged by the receiving router; otherwise, they must be retransmitted
  B. Once the adjacency relationship is established, CSNP packets and DD packets stop being sent
  C. The two packets do not require acknowledgment after being sent
  D. The master-slave relationship used in OSPF DD packet exchange is not tied to DR/BDR; CSNP messages are generated only by the DIS
  D. The master-slave relationship used in OSPF DD packet exchange is not tied to DR/BDR; CSNP messages are generated only by the DIS

• Question 542:

  Which of the following statements about the VXLAN gateway is incorrect?

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

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• Question 543:

  Which of the following does NOT belong to EVPN Type 2 routes?

  A. Host ARP advertisement
  B. BUM message forwarding
  C. Host MAC address advertisement
  D. Host IP route advertisement
  B. BUM message forwarding

• Question 544:

  Huawei Open Programmability System (OPS) uses standard HTTP methods to access managed objects and manage network devices.

  Which of the following HTTP methods is used to configure the value of a network device's managed object?

  A. PUT
  B. POST
  C. GET
  D. PATCH
  D. PATCH

• Question 545:

  An existing router running BGP, HW1, has both IBGP neighbors and EBGP neighbors configured. Are the following descriptions of IBGP neighbors and EBGP neighbors correct? (Choose three)

  A. The router will be directly connected to its EBGP neighbor; otherwise, IBGP-Multi-hop must be configured
  B. The router sends BGP updates learned from its EBGP neighbors to its other IBGP neighbors and EBGP neighbors
  C. IBGP neighbors can establish neighbor relationships through Loopback interfaces
  D. The router sends BGP updates learned from its IBGP neighbors to its other IBGP neighbors and EBGP neighbors
  E. EBGP neighbors must be directly connected; otherwise, EBGP-Multi-hop must be configured
  B. The router sends BGP updates learned from its EBGP neighbors to its other IBGP neighbors and EBGP neighbors
  C. IBGP neighbors can establish neighbor relationships through Loopback interfaces
  E. EBGP neighbors must be directly connected; otherwise, EBGP-Multi-hop must be configured

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• Question 546:

  In BGP EVPN, which type of routes is used for advertising external routes?

  A. Type 1
  B. Type 2
  C. Type 3
  D. Type 4
  E. Type 5
  E. Type 5

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  Explanation

• Question 547:

  Which of the following description about the BGP route reflector is correct? (Choose two)

  A. Cluster_List is an optional non-transitive attribute for loop protection within the cluster.
  B. The route learned from the client is advertised by the RR to all non-clients and clients.
  C. A backbone network is divided into multiple reflection clusters; each cluster configures the other RRs as non-clients and establishes an IBGP full connection between the RRs.
  D. The Originator_ID attribute is generated by the Route Reflector (RR) for inter-cluster loop protection.
  B. The route learned from the client is advertised by the RR to all non-clients and clients.
  C. A backbone network is divided into multiple reflection clusters; each cluster configures the other RRs as non-clients and establishes an IBGP full connection between the RRs.

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• Question 548:

  Which of the following is the benefit of VLAN aggregation? (Choose three)

  A. Implements isolation of broadcast domains between sub-VLANs
  B. Reduces the waste of IP addresses
  C. Increases the number of available VLANs
  D. Increases flexibility in addressing
  A. Implements isolation of broadcast domains between sub-VLANs
  B. Reduces the waste of IP addresses
  D. Increases flexibility in addressing

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• Question 549:

  What parameters can the DHCPv6 server assign to DHCPv6 clients? (Choose four)

  A. SNTP server address
  B. IPv6 address/prefix
  C. Gateway address
  D. DNS server address
  A. SNTP server address
  B. IPv6 address/prefix
  C. Gateway address
  D. DNS server address

• Question 550:

  Which of the following statements about OPS (Open Programmability System) application scenarios is incorrect?

  A. To enable a network device to automatically send a configuration file to the server after the device configuration is saved, users can use the maintenance assistant to create a timer trigger condition and periodically run the Python script.
  B. When OPS is used to automatically deploy unconfigured devices, a Python script is used to obtain the IP addresses of the software and configuration file server and download the system software and configuration file.
  C. OPS can reduce the impact of the network environment in some cases. For example, when collected information is transmitted to a server, the Python script can temporarily store the execution result on the device when the network is disconnected, and transmit the result to the server after the network is restored.
  D. OPS can be used to automatically check the health status of devices.
  C. OPS can reduce the impact of the network environment in some cases. For example, when collected information is transmitted to a server, the Python script can temporarily store the execution result on the device when the network is disconnected, and transmit the result to the server after the network is restored.