Huawei Huawei Certifications H12-891 Questions & Answers

• Question 251:

  Is the following statement about VLAN aggregation correct?

  A. Sub-VLAN is used to isolate broadcast domains

  B. A Super VLAN can contain one or more Sub-VLANs

  C. The super Sub-VLAN contains a physical interface that can establish a Layer 3 VLANIF interface

  D. Sub-VLAN contains a physical interface that can establish a Layer 3 VLANIF interface

  Correct Answer: AB

• Question 252:

  MPLS does not enable the secondary unsubject pop-up, the penultimate hop label can be the same as

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 253:

  There is an existing router running OSPF connected to Zone 0 and Zone 1 You configured Zone 1 as a stub zone, what classes does LSA that only operates inside Zone 1 include?

  A. 7 ? LSA

  B. 1 ? LSA ? 2 ? LSA

  C. I LSA,2 LSA 5 LSA

  D. 3 ? LSA ? 4 ? LSA

  E. 1 LSA,2 LSA 3 LSA

  Correct Answer: E

• Question 254:

  A company network runs the OSPF protocol, an engineer in order to understand the OSPF mechanism in the network to perform packet capture operations, the following ospf message description is correct?

  A. LSUpdate message is sent only when an adjacency relationship is established

  B. LSUpdate messages synchronize the link state database by sending detailed LSA information

  C. The interface sends Hello packets as soon as it joins the OSPF area

  D. When an LS Update packet is received, the router must send an LSAck to acknowledge

  Correct Answer: BC

• Question 255:

  The following statement about isis protocol LSP messages is correct

  A. The isP rapid diffusion feature, which first diffuses out LSPs that are smaller than a specified number , speeding up the synchronization process of LSDB

  B. By configuring an LSP-generated smart timer, the timer automatically adjusts the delay time based on the frequency at which the routing information changes

  C. As link status information increases, the packet length of the LSP can be increased so that each ISP can carry more information.

  D. Reducing the minimum interval at which LSPs are sent per port can speed up the diffusion of LSPs.

  Correct Answer: ABCD

• Question 256:

  The role of Link-LSA in OSPFv3 does not include ?

  A. Advertise to other routers on the link optional that is set in the Network LSA from which this link originates

  B. Advertise the per-port ID of this router to other routers on the link

  C. Advertise the link-local address

  D. of this interface to other routers on the link Advertise this IPv6 prefix list to other routers on the link

  Correct Answer: A

• Question 257:

  ??? aggregate ipv4-address { mask/masklength }[as-set lattribute-policy route-policy-namel ldetailsuppressedlorigin-policy route-

  in policy-name2[suppress3policy route-policy-name3], multiple parameters can be used to influence summary routes and their results. The correct description about the command is ?( Multiple choice questions).

  A. If As-set is configured, the A S_PATH of the aggregate route contains ass path information for all specific routes in case the route loop is blocked

  B. If Suppress-policy is configured, aggregate routes are also generated, and the if-match clause in Route-policy is used to pick suppressed detail routes. Detail routes that match Route-policy are still advertised to other BGP neighbors

  C. If Origin-policy is configured, only detail routes that match Route-policy can participate in aggregation

  D. If You configure The Interface-policy, you can change the properties of the aggregate route

  Correct Answer: ACD

• Question 258:

  The following information about MPLS tags describes the error as ?( Single choice questions).

  A. By default, devices support php features, and the ERAS node that supports PHP assigns a tag value of 3 to the penultimate hop node

  B. When the tag value is 0, the tag must be ejected and the message must be forwarded based on IPv4

  C. The MPLS tag is 4 bytes long and encapsulated between the link layer and the network layer.

  D. If the bottom of the label identifies S=0, it indicates that the label is the bottom label and is directly forwarded to the IP.

  Correct Answer: D

• Question 259:

  As shown in the figure, private network routing information is exchanged between PEl and PE2 and their respective CE via OSPF, and the same is configured on PEI and PE2 Domain D. When routing is introduced from BGP to OS9PF on PE2, the following limited types of LSAs may be passed to E2?

  

  A. Type7 LSA

  B. Type5 LSA

  C. Type3 LSA

  D. Type1 LSA

  Correct Answer: CD

• Question 260:

  As shown in the figure, as shown, as the AS10 has two paths to access THEA1, the optimal route passed from the 4S23 by default is now sprinkled with S00 to ass4O The odds belt wins even more worrying. Therefore, in the R2 configuration as follows, after the completion of the coordination, it is found that the most worrying route has not changed, and some operations can be adjusted to make the configuration

  ??[ R2]jpas-path-fiter l permit "4D0and [2]pouteplicy med permit node 10[R2-routepolicyli- match aspath-ilterl [R2-oute-policylapplycoast.20

  

  A. Configure compare-di fferent-as-med under the BGP process for R2

  B. Configure destiny-med under the BGP process for R1

  C. Configure compare-di fferent-as-med under the BGP process of Rl

  D. Configure the targeted-med under the BGP process for R2

  Correct Answer: BC