Huawei Huawei Certifications H12-831 Questions & Answers

• Question 31:

  To prevent hackers from attacking user devices or networks through MA, C addresses, you can configure the MA, C addresses of untrusted users as black hole MA, C addresses to filter out illegal MA, C addresses.

  A. True

  B. False

  Correct Answer: A

• Question 32:

  The OSPF protocol is run between CE and PE, when CE1 advertises the route of its site to CE2. Which of the following descriptions is incorrect?

  A. WhenPE2receivePE1sentBGProutedDomain IDcorrect for all when different from localLSA. PE2will generateType5LSAorType7 LSA

  B. WhenPE2receivePE1sentBGProutedDomain IDWhen the same as local, forTypel LSAandType2LSA. PE2will generateType3 LSA

  C. WhenPE2receivePEIsentBGProutedDomain IDSame as local forType3 LSA. PE2will generateType5 LSA

  D. PEIconfiguredDomain IDcan be used asBGPThe extended community attribute of is sent with the route toPE2

  Correct Answer: C

• Question 33:

  IEIF expands the functions of OSPF by taking advantage of the strong expansibility of OSPF. To enable it to support IPv6 networks, the expanded protocol is called OSPFv3. OSPFv3 is compatible with OSPFv2.

  A. True

  B. False

  Correct Answer: B

• Question 34:

  display interface GEO/O/O once, and found that the Total Eror count (the total number of error packets at the physical layer of the interface) is not correct. . At this time, it can be concluded that the current time and fall has not disappeared.

  A. True

  B. False

  Correct Answer: A

• Question 35:

  According to the configuration shown in the figure below, you can know that R4 has an interface advertised into IS-IS?

  

  A. 1

  B. 3

  C. 2

  D. 0

  Correct Answer: B

• Question 36:

  After the VLAN-based MA, C address flapping detection function is configured, if the MA, C address flaps. The interface can be configured to perform actions according to requirements. Which of the following is NOT a configurable action?

  A. Traffic filtering

  B. send alert

  C. interface blocking

  D. MA, Caddress blocking

  Correct Answer: A

• Question 37:

  The following six tools cannot be used to match BGP routing entries?

  

  A. Community Filter

  B. advancedA, CL

  C. basicA, CL

  D. IP Prefix List

  Correct Answer: B

• Question 38:

  When troubleshooting the EBGP neighbor relationship, you find that the two directly connected devices use the loopback interface to establish a connection, so execute display current-configuration configuration bgp to check the unitary setting of peer ebgp-max-hop hop-count, which of the following statements is correct?

  A. hop-countmust be greater than2

  B. hop-countmust be greater than15

  C. hop-countmust be greater than1

  D. hop-countmust be greater than255

  Correct Answer: C

• Question 39:

  MPLS is called Multi-Protocol Label Switching. Regarding the label description in MPLS, the correct one is:

  A. MPLSThe system has a variety of label publishing protocols, such asLDPis a label publishing agreement

  B. Labeled byMIPLSheader of messageBIt has global significance, that is, the label values of all routers cannot be repeated.

  C. A label is a fixed-length identifier with only local significance, which is used to uniquely identify the group to which a group belongs.FEC

  D. MPLSSupports single-layer labels as well as multi-layer labels

  Correct Answer: ACD

• Question 40:

  What check items can be set by IPSG?

  A. MA, Caddress

  B. Outgoing interface

  C. VLANID

  D. IPaddress

  Correct Answer: ABCD