Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 141:

  In an MPLS VPN network, different CE devices exchange routing information with the same PE device using different routing protocols, and different CE devices use routing protocols that are independent of each other.

  A. True
  B. False
  A. True

• Question 142:

  If we have a VPN instance configured on a router, and we need to view the VPN route on a Huawei router, which of the following commands should we use?

  A. display ip routing-table vpn-instance vpn-instance-name
  B. display ip routing-table
  C. display vpn routing-table
  D. display ip vpn-instance
  A. display ip routing-table vpn-instance vpn-instance-name

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• Question 143:

  In broadcast networks, elections for the DIS begin only after a neighbor relationship has been established.

  A. True
  B. False
  A. True

• Question 144:

  MPLS is called multiprotocol label switching, which of the following label descriptions in MPLS is correct? (Choose three).

  A. The MPLS system utilizes various label distribution protocols, such as LDP, which is a label distribution protocol.
  B. The label in an MPLS header does not have global significance; instead, it has local significance, meaning that label values can be reused across different routers.
  C. A label is a fixed-length identifier that is locally significant and uniquely identifies the Forwarding Equivalence Class (FEC) to which a packet belongs.
  D. MPLS supports both single-layer labels and multi-layer labels (commonly referred to as label stacking).
  A. The MPLS system utilizes various label distribution protocols, such as LDP, which is a label distribution protocol.
  C. A label is a fixed-length identifier that is locally significant and uniquely identifies the Forwarding Equivalence Class (FEC) to which a packet belongs.
  D. MPLS supports both single-layer labels and multi-layer labels (commonly referred to as label stacking).

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  Explanation

• Question 145:

  Regarding the cross-domain VPN-Option B scenario, which of the following descriptions is incorrect?

  A. In the process of packet forwarding, the private network LSP of the VPN should be exchanged once on the two ASBRs with an EBGP neighbor relationship.
  B. Cross-domain VPN Option B is not limited by the number of interconnection links between ASBRs.
  C. The scheme is not limited by the number of interconnection links between ASBRs.
  D. The outer label is exchanged between two ASBRs for VPNv4 routes.
  D. The outer label is exchanged between two ASBRs for VPNv4 routes.

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  Explanation

• Question 146:

  Telemetry data must be encoded in GPB binary format. This format reduces the number of bytes in telemetry messages and improves the transmission efficiency compared with messages encoded in JSON format.

  A. TRUE
  B. FALSE
  B. FALSE

• Question 147:

  View the details of all VPN instances on a network device, and the results are as follows. Which of the following statements is incorrect? (Choose two)

  

  A. The total number of instances that enable the IPv6 address family in the VPN configured on this side is 1
  B. VPN-Instance vpna does not receive VPN routes with an RT of 2:1
  C. The GigabitEthernet 1/0/0 interface is bound to VPN-Instance vpna
  D. The device assigns a label to each route of VPN-Instance vpna
  A. The total number of instances that enable the IPv6 address family in the VPN configured on this side is 1
  D. The device assigns a label to each route of VPN-Instance vpna

• Question 148:

  When the payload is an ICMPv6 message, what is the numeric value of the Next Header field in the IPv6 header, assuming no extension headers are present? (Choose three)

  A. 58
  B. 78
  C. 55
  D. 68
  A. 58
  C. 55
  D. 68

• Question 149:

  MPLS supports Forwarding Equivalence Class (FEC). Which of the following cannot be used as a FEC allocation standard?

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

• Question 150:

  What categories can ACLs be divided into? (Choose three)

  A. Advanced ACL
  B. Layer 2 ACL
  C. User-defined ACL
  D. Basic ACL
  A. Advanced ACL
  B. Layer 2 ACL
  C. User-defined ACL

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  Explanation