Huawei Huawei Certifications H12-891 Questions & Answers

• Question 491:

  In an MPLSVPN network, when a packet enters the Internet and is forwarded, it is encapsulated with two layers of MPLS tags, and the processing of the packet in the following options is described correctly?

  A. The penultimate hop device receives packets with an outer label of 3

  B. The Egress PE appliance receives an UNlabeled IP packet C. The Egress PE device correctly sends packets to the appropriate VPN

  D. based on the inner tag The packet pops up the outer label on the penultimate hop device and forwards it to the Egress PE device

  Correct Answer: ACD

• Question 492:

  Without dividing the zone, is the following description of the link state routing protocol correct?

  A. Each router establishes a topology for the entire floodplain

  B. Each router learns route entries directly from the route update and adds them to the routing table

  C. Routers in the flood domain may receive the same link state information repeatedly

  D. Routers throughout the flood domain have the same database of wrong-state states

  E. The router will send all the mis-routing status information from one neighbor to all other neighbors to ensure the synchronization of the database

  Correct Answer: ACD

• Question 493:

  The switch SWA and SWB are connected together by 2 Ethernet links, where the switch SWA has the following interface configuration:

  

  A. Without changing the current configuration, GigabitEthernet1/0/1 and GigabitEthernet1/0/2 can join the same aggregation group

  B. Because of the different VLANs allowed, GigabitEthernet1/0/1 and GigabitEthernet1/0/2 cannot join the same aggregation group

  C. After link clustering is configured on both SWA and SWB, if MSTP is enabled on the switches SWA and SWB Both GigabitEthernetl1/0/1 and GigabitEthernetl/O/2 are the forwarding status of MSTP

  D. Only if the configuration of GigabitEthernet 1/0/2 is changed to match GigabitEthernet 1/0/1 can the two join the same aggregation group

  Correct Answer: BD

• Question 494:

  Compared to IPV4 multicast, which of the following descriptions is the characteristic of IP6 multicast?

  A. IPv6 multicast does not contain MSDP and dense mode

  B. The first 8bit IPV6 multicast address is always FF(11111111).

  C. IPv6 multicast clients use IGMPv3 to join multicast groups

  D. IPv6 multicast load sharing extends the multicast routing rules and is completely independent of RPF check

  Correct Answer: B

• Question 495:

  OSPFV is the GP running on the P4 network) OSPF3 is the KGP running on the IP6 network. OsPFV works the same basic way as OSPF2, such as elections for DR and BDR. As shown in the figure, an engineer uses three routers for IP6 service testing, and he wants to interconnect the IPv6 network by running OSPFv3 Which of the following statements is correct regarding the election of the network DR?

  

  A. After the network converges, R1 is DR

  B. After the network converges, the engineer modifies the priority of R1 to 100, the priority of R2 to 10, and R3 to the default value. When the network converges again, Rl is DR and R2 is BDR

  C. After the network converges, the broadcast link adds a device, R4, with a priority of 150 When the network converges again, R4 is DR

  D. After the network converges, R1 is powered off and restarted, and when the network converges again, R3 is DR

  Correct Answer: BCD

• Question 496:

  The following description of BGP ring protection is correct

  A. The BGP router does not announce any updates from the EBGP peer to other EBGP peers

  B. BGP routers that are not RR do not announce any updates from the IBGP peer to other IBGP peers

  C. Any routing information from the IBGP peer is advertised to the other IBGP peers

  D. , through the AS-path attribute, discard any update information received from the EBGP peer that contains its own AS number in the AS-path attribute

  Correct Answer: BD

• Question 497:

  The following description of VLANs in Ethernet is correct?

  A. VLANs do not support bulk creation on devices

  B. The range of VLANs is 0 to 4096

  C. The default reserved VLANs for Huawei devices are 4000~4010

  D. VLANs can be extended through QinQ technology.

  Correct Answer: D

• Question 498:

  The topology diagram and configuration are as follows, and now we hope that there is no buttoned route entry of 10033/32 in the Rl route table

  

  A. Configure route summarization on R3 to summarize the routes to 10000/16

  B. Configure route rollup on R2 to summarize the route as 10000/16

  C. Configure filter-pollcy on top of R1 with 10033/32 via ACLL. Also applied in the Import direction

  D. Configure flter-policy on the above, match 10033/32 through ACL, and apply the answer in the expo direction

  Correct Answer: AC

• Question 499:

  In a network in MPLSVPN, different CE devices can exchange routing information with the same PE device using different routing protocols, and different CE devices can exchange routing information with the same PE The routing protocols used between devices are independent of each other

  A. True

  B. False

  Correct Answer: A

• Question 500:

  ISlS protocol In broadcast networks and P2P networks, when the router receives LSP, it needs to use PSNP to confirm and ensure the synchronization of LSDB

  A. True

  B. False

  Correct Answer: B