Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 91:

  To allow only authorized users (users who obtain IP addresses through authorized DHCP servers or use specified static IP addresses) to access the network shown in the exhibit, which of the following solutions can be used?

  

  A. DAI + Port Security
  B. DHCP Snooping + IPSG
  C. DHCP Snooping + DAI
  D. DAI + IPSG
  B. DHCP Snooping + IPSG

• Question 92:

  Huawei Open Programmability System (OPS) uses HTTP methods to access managed objects to manage network devices. To facilitate script compilation, Huawei OPS provides the Python script template. In the Python script template, what are the contents of the Content-type and Accept fields in the header of an HTTP request packet?

  A. text/xml, text/json
  B. text/json, text/json
  C. text/xml, text/xml
  D. text/json, text/xml
  B. text/json, text/json

• Question 93:

  Which of the following statements is correct about the differences between NSR and NSF?

  A. NSR requires the collaboration of neighboring routers.
  B. NSF requires the collaboration of neighboring routers.
  C. NSF does not require the collaboration of neighboring routers.
  D. Both NSR and NSF require the collaboration of neighboring routers.
  B. NSF requires the collaboration of neighboring routers.

• Question 94:

  Which of the following descriptions about duplicate address detection feature for NDP is incorrect?

  A. An IPv6 unicast address is called a tentative address after it is assigned to an interface and before it is detected by duplicate addresses.
  B. Duplicate address detection is implemented via RS and RA messages.
  C. IPv6 duplicate address detection technology is similar to ARP in IPv4.
  D. The interface needs to perform duplicate address detection before enabling any of the unicast IPv6 addresses.
  B. Duplicate address detection is implemented via RS and RA messages.

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• Question 95:

  When there are multiple ACL rules in VRP, which of the following statements about the matching order is true?

  A. By default, matching is based on the principle of “depth first”
  B. By default, matching occurs in the order of permit first and deny later
  C. By default, matching is performed from smallest to largest according to the Rule-ID
  D. There is only one matching order and it cannot be modified
  C. By default, matching is performed from smallest to largest according to the Rule-ID

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• Question 96:

  The naming of SRv6 instructions complies with certain rules. You can quickly determine the function of an instruction based on the instruction name. Which of the following statements about the keywords in SRv6 instruction names are correct? (Choose three)

  A. T: searches a specified routing table to forward packets.
  B. M: searches a Layer 2 forwarding table for unicast forwarding.
  C. V: searches a VPN instance routing table to forward packets.
  D. X: forwards packets through one or a group of specified Layer 3 interfaces.
  A. T: searches a specified routing table to forward packets.
  C. V: searches a VPN instance routing table to forward packets.
  D. X: forwards packets through one or a group of specified Layer 3 interfaces.

• Question 97:

  Huawei's two switches SWA and SWB are connected using 7 Ethernet cables, and static link aggregation is configured. The corresponding ports on switch SWA are Ethernet1/0/1, Ethernet1/0/2, Ethernet1/0/3, Ethernet1/0/4, Ethernet1/0/5, Ethernet1/0/6, and Ethernet1/0/7, configured in ascending port order. If switches SWA and SWB each support only 6 ports per aggregation group:

  A. In the case of consistent configuration on each port, the Ethernet1/0/6 port is an unselected port of the aggregation group.
  B. In the case of consistent configuration on each port, the Ethernet1/0/1 port is an unselected port of the aggregation group.
  C. With consistent configuration on each port, the Ethernet1/0/7 port is the unselected port of the aggregation group.
  D. With consistent configuration on each port, SWA randomly selects one of the 7 ports as the unselected port of the aggregation group.
  C. With consistent configuration on each port, the Ethernet1/0/7 port is the unselected port of the aggregation group.

• Question 98:

  Which of the following description about the OSPFv3 message is correct? (Choose three)

  A. The interface ID of the sending interface must be included in the Hello packet
  B. The LSACK message contains LSA header information to confirm the receipt of LSU packets
  C. The LSR message contains the complete LSA header information for requesting an update to the LSA
  D. Hello messages and the Option field for DD messages extend to 24 bits
  A. The interface ID of the sending interface must be included in the Hello packet
  B. The LSACK message contains LSA header information to confirm the receipt of LSU packets
  D. Hello messages and the Option field for DD messages extend to 24 bits

• Question 99:

  Traditional BGP-4 can only manage IPv4 unicast routing information, and MP-BGP extends BGP-4 to provide support for multiple network layer protocols. Among these, MP-BGP's support feature for IPv6 unicast networks is called BGP4+. In BGP4+, the route next-hop address information is carried by the NextHop attribute.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 100:

  Man-in-the-middle attacks (MITM) or IP/MAC spoofing attacks are common on intranets and can cause information leakage. Which configuration method can prevent these attacks?

  A. Configure the trusted or untrusted interface.
  B. Limit the maximum number of MAC addresses that can be learned on a switch interface.
  C. Configure DHCP snooping to check the CHADDR field carried in a DHCP Request packet.
  D. Configure association between DHCP snooping and IPSG or DAI on the switch.
  D. Configure association between DHCP snooping and IPSG or DAI on the switch.