Huawei Huawei Certifications H12-891 Questions & Answers

• Question 581:

  ISIS elects DIS in broadcast multiplexed access networks, and the following statement about DIS is correct?( Multiple choice)

  A. ISIS elects dis by comparing priorities, and mac addresses if the priorities are consistent

  B. In a broadcast multiple access network, DIS sends Hello PDUs at three times the frequency

  C. DIS guarantees database synchronization by periodically sending CSNP messages

  D. DIS supports preemption function, after the new DIS preemption is successful, there is no need to flood any LSP packet

  Correct Answer: ABC

• Question 582:

  A switch joins a running stacking system after powering up, a behavior known as heap overlay.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 583:

  In order to reduce the number of OSPF routes in certain areas, the OSPf protocol has developed special area functions, and the following description of the characteristics of OSPF special areas is correct

  A. ASBR-Sunmary-LSA is allowed to be published to the NSSA region

  B. AS-External-LSA is allowed to be published to the Stub region

  C. Any OSPF zone can be configured as a special zone

  D. Zone can be equipped with zhiyi

  Correct Answer: D

• Question 584:

  What of the following actions can enable fast failure detection on multicast networks?

  A. Shorten the Holdtime of Join/Prune messages

  B. Reduce the interval at which the interface sends Hello messages

  C. A PIM BFD session is established between neighbors

  D. Reduce the interval between sending Join/Prune messages

  Correct Answer: B

• Question 585:

  Router HW enables OSPF and router HW has the role of ABR and is configured with abr- summary, then which class LSA Will it be aggregated?

  A. 1 Class LSA

  B. 2 kind LSA

  C. 3 kind LSA

  D. 4 kind LSA

  E. 5 Class LSA

  Correct Answer: AB

• Question 586:

  There is an As-path-filter.ip as-path-filter 1 permit*(100l400) $, which As-path-filter can match which of the following AS_PATH Attribute?( Confirmed).

  A. 300 4200

  B. 1234 1400

  C. 3100

  D. 100

  Correct Answer: BCD

• Question 587:

  For Layer 2 VPN technology, the following statement is correct? Multi-select

  A. VPLS is a widely used technology in the live network, which can provide transparent transmission of three-layer messages and achieve multi-point access.

  B. The VPLS configuration is complex and the Layer 2 network transmits BUM packets.

  C. BGPEVPN supports features such as tenant isolation, Multi-homing, and broadcast suppression. D. BGPEVPN addresses mac address drift and multi-tenancy that VPLS cannot support.

  Correct Answer: BC

• Question 588:

  The following statement about the alliance is correct?( Single choice questions).

  A. The consortium divides an AS into sub-AS, and the alliance external AS still considers the consortium to be an AS

  B. Subsystems within a consortium can use private AS numbers. Huawei NE/AR routers, a consortium can be configured with up to 32 subsystems

  C. Consortium can easily detect the routing loop within the AS because EBGP is running between the subAS.

  D. The subas number of the consortium, which by default notifies BGP peers outside the consortium

  Correct Answer: D

• Question 589:

  After configuring the VLAN-based MAC address drift detection function, if the MAC address drifts, you can configure the actions of the interface according to your needs. Which of the following is not a configurable action?

  A. Send an alert

  B. The MAC address blocks

  C. Interface blocking

  D. Traffic filtering

  Correct Answer: D

• Question 590:

  In the use of the CP protocol, the following description is correct?

  A. The Eth-Trunk interface can be avoided by frequent oscillation interfaceethtrunkllacppreemptenablelacppreemptdelaydelay-time by following command

  B. Source A address can be configured for load sharing in an enabled link aggregation group with the following command: interface eth-trunk 110ad-balance src-dst-ip

  C. A member interface can be removed from an enabled link aggregation group with the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 undo eth-trunk 1 interfaceGigabitEthernet0/0/1undoshutdown

  D. The member interface can be joined in the link aggregation group by enabling the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 trunkport

  Correct Answer: A