Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 861:

  FILL IN THE BLANK

  The _____ command can be run to completely isolate Layer 2 and Layer 3 of different interfaces in a VLAN. (Use lowercase letters to supplement the command, which cannot be abbreviated.)

  isolate-user-vlan

• Question 862:

  What are the characteristics of Syslog information? (Choose three)

  A. The transmission of Syslog messages is not secure.
  B. The transmission of Syslog messages is reliable.
  C. The transmission of Syslog messages is confirmable.
  D. The transmission of Syslog messages is secure.
  E. The transmission of Syslog messages is not acknowledgeable.
  F. The transmission of Syslog messages is unreliable.
  A. The transmission of Syslog messages is not secure.
  E. The transmission of Syslog messages is not acknowledgeable.
  F. The transmission of Syslog messages is unreliable.

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  Explanation

• Question 863:

  The channelized sub-interface and FlexE technologies can both be used to implement network slicing, but their application scenarios differ slightly. Which of the following statements about these two technologies are correct? (Choose three)

  A. It is recommended that channelized sub-interface be used to reserve resources for interfaces with a bandwidth of less than 50 Gbit/s.
  B. It is recommended that FlexE be used to reserve resources for 50GE and higher-rate interfaces.
  C. Only FlexE-based network slicing can be deployed across OTN devices.
  D. Only network slicing based on channelized sub-interface can be deployed across MSTP devices.
  A. It is recommended that channelized sub-interface be used to reserve resources for interfaces with a bandwidth of less than 50 Gbit/s.
  B. It is recommended that FlexE be used to reserve resources for 50GE and higher-rate interfaces.
  C. Only FlexE-based network slicing can be deployed across OTN devices.

• Question 864:

  Refer to the exhibit, OSPF is enabled on all router interfaces. The IP addresses shown in the exhibit are the Loopback0 addresses of the routers.

  

  The Loopback0 addresses of R1 and R2 are advertised in Area 1, the Loopback0 address of R4 is advertised in Area 0, and the Loopback0 addresses of R3 and R5 are advertised in Area 2.

  Based on this information, which of the following Loopback IP addresses can successfully ping each other?

  A. 10.0.3.3 and 10.0.5.5
  B. 10.0.2.2 and 10.0.5.5
  C. 10.0.2.2 and 10.0.3.3
  D. 10.0.4.4 and 10.0.2.2
  C. 10.0.2.2 and 10.0.3.3

• Question 865:

  As shown in the figure, in the context of IPv4 and IPv6, the SEL field in the NET address of ISIS is always valued as 00.

  

  A. True
  B. False
  A. True

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  Explanation

• Question 866:

  Which of the following tools cannot be referenced directly by the If-match clause in Route- policy?

  A. Regular expression
  B. IP-prefix
  C. AS-path-filter
  D. Community-filt
  A. Regular expression

• Question 867:

  In an HW IP multicast network, where multiple sources exist and each source has several receivers, which protocol allows source-to-RP traffic and RP-to-receiver traffic to share the same tree?

  A. MOSPF
  B. PIM-SM
  C. DVMRP
  D. 56768GZliuji
  E. PIM-DM
  D. 56768GZliuji

• Question 868:

  The Next Header field information exists only in the header of an IPv6 message and is used to indicate whether an extended header exists for IPv6.

  A. True
  B. False
  B. False

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  Explanation

• Question 869:

  As shown in the figure, three switches S1, SN2, and SN3 exist, where S1 is the root bridge between S1 and SN2. If the link toward SN2 cannot receive the configuration BPDU sent by the root bridge, which spanning tree protection mechanism should the administrator configure to prevent link congestion?

  

  A. root protection
  B. Anti-TC-BPDU attack
  C. BPDU protection
  D. Loop protection
  D. Loop protection

• Question 870:

  Which of the following statement about a cross-domain MPLS VPN is incorrect? (Choose two)

  A. When the public network label is LDP-only, for a cross-domain VPN-Option C scenario 2, a three-layer label stack is required in the packet forwarding process.
  B. For the cross-domain VPN-Option B approach, an MP-eBGP neighbor relationship needs to be established between the two ASBRs.
  C. For the cross-domain VPN-Option A mode, the routes exchanged between the two ASBRs are normal IPv4 routes.
  D. For the cross-domain VPN-Option B approach, when two ASBR-PEs are interconnected with multiple interfaces (including sub-interfaces), each associated with a VPN, each ASBR-PE treats the peer as a CE.
  A. When the public network label is LDP-only, for a cross-domain VPN-Option C scenario 2, a three-layer label stack is required in the packet forwarding process.
  D. For the cross-domain VPN-Option B approach, when two ASBR-PEs are interconnected with multiple interfaces (including sub-interfaces), each associated with a VPN, each ASBR-PE treats the peer as a CE.

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