Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 851:

  An engineer uses two routers to test IPv6 services and runs OSPFv3 to achieve interconnection of IPv6 networks. R1 should learn the loopback address of R2. The engineer checks R1's OSPFv3 routing table and finds no route to R2's loopback address. Which of the following cannot be the cause?

  A. R2 does not enable OSPFv3 on the loopback interface
  B. R2 does not advertise the loopback address
  C. R2 advertises the loopback into a different OSPFv3 process than area 0
  D. R2 does not configure the Router ID used in the OSPFv3 process
  B. R2 does not advertise the loopback address

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  Explanation

• Question 852:

  If all the public IP addresses are used by a company's intranet users to access the Internet using NAT's No-PAT method, what will happen to subsequent intranet users who access the Internet?

  A. Automatically switch NAT to PAT after the Internet
  B. Subsequent intranet users will not be able to access the Internet
  C. Synchronize messages to other NAT conversion devices for NAT conversion
  D. Squeeze out the previous user and force NAT conversion to go online
  B. Subsequent intranet users will not be able to access the Internet

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• Question 853:

  In Huawei devices, when IS-IS introduces external routes and sets external route tags for the route information, the metric type of IS-IS does not need to be modified and remains at its default.

  A. True
  B. False
  B. False

• Question 854:

  When VXLAN under different VPNs needs interoperability, one subnet is configured as follows:

  EVPN uses RT 10:10 both and RT 1000:1000 export, and the VPN uses RT 100:100.

  The other subnet should be configured as which of the following? (Choose two)

  A. Configure 1000:1000 both under the VPN
  B. Configure 1000:1000 both under EVPN
  C. Configure 1000:1000 export under EVPN
  D. Configure 10:10 both under the VPN
  A. Configure 1000:1000 both under the VPN
  B. Configure 1000:1000 both under EVPN

• Question 855:

  Which of the following statements about Layer 2 VPN technology are correct? (Choose two)

  A. VPLS is a widely used technology in live networks, providing transparent transmission of Layer 3 messages and supporting multi-point access.
  B. VPLS configuration is complex, and the Layer 2 network transmits Broadcast, Unknown unicast, and Multicast (BUM) packets.
  C. BGP EVPN supports features such as tenant isolation, multi-homing, and broadcast suppression.
  D. BGP EVPN addresses MAC address drift and multi-tenancy issues that VPLS cannot support.
  B. VPLS configuration is complex, and the Layer 2 network transmits Broadcast, Unknown unicast, and Multicast (BUM) packets.
  C. BGP EVPN supports features such as tenant isolation, multi-homing, and broadcast suppression.

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  Explanation

• Question 856:

  Which of the following statements about MUX VLANs are correct? (Choose three)

  A. The Principal VLAN can communicate with all VLANs within the MUX VLAN.
  B. Each Separate VLAN must be bound to a Principal VLAN.
  C. Separate VLANs can communicate with all VLANs within a MUX VLAN.
  D. Each Group VLAN must be bound to a Principal VLAN.
  A. The Principal VLAN can communicate with all VLANs within the MUX VLAN.
  B. Each Separate VLAN must be bound to a Principal VLAN.
  D. Each Group VLAN must be bound to a Principal VLAN.

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  Explanation

• Question 857:

  In an IPv6 network, two nodes A and B are neighbors of each other. If node A sends an NS message to node B, and node B receives the message and then replies with an NA message, then on node A, the neighbor state will be marked as what?

  A. Reachable
  B. Incomplete
  C. Constant
  D. Probe
  A. Reachable

• Question 858:

  On a router, SRv6 is enabled, and the configurations shown below are performed. Which of the following statements about the configurations are correct? (Choose three)

  [Router-segment-routing-ipv6] locator srv6_locator1 ipv6-prefix 2001:DB8:ABCD::/64 static 32

  A. The locator of this node is 2001:DB8:ABCD::.
  B. The static segment of the node occupies 32 bits.
  C. The dynamic segment of the node occupies 32 bits.
  D. The Args field of this node occupies 32 bits.
  A. The locator of this node is 2001:DB8:ABCD::.
  C. The dynamic segment of the node occupies 32 bits.
  D. The Args field of this node occupies 32 bits.

• Question 859:

  Which of the following protocols is used in the Huawei SD-WAN Solution to report device performance data?

  A. NetFlow
  B. SNMP
  C. BGP
  D. HTTP/2
  D. HTTP/2

• Question 860:

  Network managers can use CAR technology in traffic policing. Which of the following technologies can be applied in CAR? (Choose two)

  A. Double bucket two-rate
  B. Double bucket single-rate
  C. Single bucket single-rate
  D. Three buckets single-rate
  A. Double bucket two-rate
  B. Double bucket single-rate

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  Explanation