Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 621:

  In an MPLS domain, depending on how the LSR handles the data, the LSR can be divided into Ingress LSR, Transit LSR, and Egress LSR. For the same FEC, an LSR can be an Ingress LSR for that FEC or a Transit LSR for that FEC.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 622:

  To study the working mechanism of the OSPFv3 protocol, a network topology project is built. Given the configurations for R1 and R2, what are the types of LSAs exchanged between R1 and R2? (Choose three)

  A. Network-LSA
  B. Router-LSA
  C. Link-LSA
  D. Inter-Area-Prefix-LSA
  A. Network-LSA
  B. Router-LSA
  C. Link-LSA

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• Question 623:

  Which of the following statements about the multicast address used by OSPFv3 is correct? (Choose two)

  A. DR routers use FF02::6
  B. DR routers use FF08::6.
  C. All OSPF routers use FF02::5
  D. All OSPF routers use FF08::5.
  A. DR routers use FF02::6
  C. All OSPF routers use FF02::5

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• Question 624:

  You try to trace a remote Internet address on your PC, but the traceroute stops after it reaches a router, and currently, the router should be in the incoming direction of the serial interface. With an ACL "rule 5 permit tcp source any destination any," you need to add which of the following ACLs to the router for traceroute to work?

  A. Rule 10 permit icmp source any destination any icmp-type ttl-exceeded; rule 15 permit icmp source any destination any icmp-type echo-reply
  B. Rule 10 permit icmp source any destination any icmp-type echo; rule 15 permit icmp source any destination any icmp-type net-unreachable
  C. Rule 10 permit tcp source any destination any
  D. Rule 10 permit icmp source any destination any icmp-type ttl-exceeded; rule 15 permit icmp source any destination any icmp-type port-unreachable
  E. Rule 10 permit udp source any destination any; rule 15 permit icmp source any destination any icmp-type protocol-unreachable
  D. Rule 10 permit icmp source any destination any icmp-type ttl-exceeded; rule 15 permit icmp source any destination any icmp-type port-unreachable

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• Question 625:

  In a multi-protocol network, the topology is shown in the figure. Router R4 (in Area 1) learns routes via BGP, which are then introduced into the OSPF process. What types of LSAs will R3 advertise to Area 0? (Choose three)

  

  A. Type 5 - LSA
  B. Type 7 - LSA
  C. Type 1 - LSA
  D. Type 4 - LSA
  E. Type 2 - LSA
  A. Type 5 - LSA
  C. Type 1 - LSA
  E. Type 2 - LSA

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  Explanation

• Question 626:

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

• Question 627:

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

• Question 628:

  There can be multiple nodes under a route-policy. Different node numbers are identified by nodes, and each node can have multiple if-match and apply clauses. Which of the following descriptions are incorrect? (Choose two)

  A. The relationship between the if-match clauses under each node is "and"
  B. The relationship between different nodes is an "and" relationship
  C. There is an "or" relationship between different nodes
  D. The relationship between the if-match clauses under each node is "or"
  B. The relationship between different nodes is an "and" relationship
  D. The relationship between the if-match clauses under each node is "or"

• Question 629:

  Identify the error in the following descriptions regarding BGP routing:

  A. Non-aggregate routes take precedence over aggregate routes.
  B. In PrefVal, Local_Preference is equivalent when the route is generated locally; for IBGP routing, the BGP preference effectively prioritizes EBGP routing.
  C. Consider the following BGP routing table entry: * 172.161.11/32 000010 0?. This indicates that the route is available but non-optimal.
  D. Routes with an unreachable next_hop are invalid and do not participate in the preferred route selection.
  A. Non-aggregate routes take precedence over aggregate routes.

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  Explanation

• Question 630:

  As shown in theexhibit, SW1 and SW2 use asymmetric IRB (Integrated Routing and Bridging) forwarding, and PC1 and PC2 communicate with each other. Which of the following is the destination MAC address of the original data frame in the packet sent from VTEP1 to VTEP2?

  A. MAC D
  B. MAC B
  C. MAC C
  D. MAC A
  C. MAC C