Huawei Huawei Certifications H12-891 Questions & Answers

• Question 501:

  The correct statement about the difference between OSPFv2 and OSPFv3 is ? Multi-select

  A. BOTH OSPFv2 and OSPFv3 support interface authentication. And OSPFv3 authentication is still based on the fields in the ospf message header

  B. OSPFv3 is similar to OSPFv2 in that it uses a multicast address as the OSPF message destination address

  C. The same type of message exists in OSPFv2, OSPFv3: Hello, DD, LSR, LSU, LSAack, Their message format is the same

  D. OSPFv2 has the protocol number 89 in the IPv4 packet header, OSPFv 3 The next number in the IPv6 message header is 89

  Correct Answer: BCD

• Question 502:

  Four routers running IS-4S and an adjacency relationship has been established, the area number and the level of the router are noted in the figure, and the R4 reaches 10022/32 on the RI device Cost for how much?

  

  A. 50

  B. 80

  C. 40

  D. 30

  Correct Answer: B

• Question 503:

  In the following topology diagram, R1 can access the Internet through R2 and R3, R1 and R2, R1 and R1 An EGP connection is established between R3 , and R2R3 belongs to the same AS, each via BGP Publishing a default route that requires R1 to visit lnternet's traffic preference R2, can the following practices be achieved?

  A. R1 specifies that the peer R3 sets the MED property to 150 in the import direction

  B. R2 specifies that the peer R1 sets the local priority to 150 in the export direction

  C. R2 specifies that the peer R1 sets the MED property to 150 in the export direction

  D. R1 specifies that the peer R2 beats the local priority in the import direction to 150

  Correct Answer: AD

• Question 504:

  Regarding MP-BGP, the following description is wrong?

  A. Radio A. MP-BGP needs to assign a private label to the VPNv4 route

  B. PE and CE are routed through BGP interaction, you need to create a BGP process on ce for each VPN instance

  C. The message type and VPNv4 routing publishing policy for MP-BGP are the same as for BGP-4

  D. MP-BGP advertises VPNv4 through two attributes, MP_REACH_NLRI and MP_UNREACH_NLRI Route

  Correct Answer: B

• Question 505:

  In route-policy, what are the BGP attributes that can be used for the apply clause?

  A. AS-Path

  B. MED

  C. Local-Preference

  D. Day

  Correct Answer: ABC

• Question 506:

  A company network runs the OSPF protocol, a project in order to understand the OSPF mechanism in the network to perform packet transfer operations, the following description of ospf messages is correct?

  A. The interface sends a Hello packet immediately after joining the OSPF region

  B. LS update packet is sent only when the adjacency relationship is established

  C. When an LsUpdate packet is received, the router must send an LsAck acknowledgment

  D. LS update packet synchronizes the link state database by sending detailed LSA information

  Correct Answer: AD

• Question 507:

  Router RL and Router R2 run BGP both routers are in the AS65234 The router R2 route is present in the BGP routing table of router RI, but not in the P of router R1 road

  A. With BGP, both routers are in the AS65234 Route cry PD is done by the right big worker

  B. By the table, so what causes the problem to occur? A, synchronization is turned off

  C. The B. BGP neighbor relationship is Down

  D. Router R1 does not enable BGPMulti-hop D Routing is not optimal

  Correct Answer: D

• Question 508:

  LDP messages are exchanged between LDLRs running the LDP protocol, and LDP messages can be divided into four types according to function, which of the following is not an LDP message type ?

  A. Advertisement message

  B. Discover message

  C. Conversation message

  D. Label Exchange Information

  Correct Answer: D

• Question 509:

  What are the following techniques for improving MPLS BGP VPN reliability?( Multiple choice question)

  A. dual home networking is configured at the access layer

  B. VPN FRR

  C. VPN GR Private IP routing between

  D. PE-CE FRR

  Correct Answer: ABCD

• Question 510:

  Cross-device link aggregation realizes the back-to-back transmission of data traffic and the mutual spare of the heap member switches, but due to the limited bandwidth of the heap cable between the heap devices, the forwarding efficiency can be improved in the following ways?

  A. Enable traffic to be forwarded locally first

  B. Connect the stacking device via a stacking card

  C. Configure the stacking system MAC address switching

  D. Enables the stacking multi-master check function

  Correct Answer: A