Huawei Huawei Certifications H12-891 Questions & Answers

• Question 431:

  The following description of the PPPoE data frame is correct?( Multiple choice questions).

  A. Once a PPPoE session is established, all Ethernet packets are unicast

  B. The Ethernet_Type domain is fixed to Ox8863

  C. When PPPoE passes session data, Code must be set to Ox0

  D. The Session_ID of the PPP session is not allowed to change and must be the specified in the Discovery phase

  Correct Answer: CD

• Question 432:

  Regarding the OSPFv3 protocol, what is the error described below?

  A. Under the sukugan of a shared router, each OSPFv3 process runs independently

  B. Multiple instances can be run in the same OSPFv3 under the same interface

  C. Can support running multiple instances on a single link

  D. OSPFv3 message header will contain instance IDFu Duan flogging

  Correct Answer: B

• Question 433:

  A workstation is connected to an Ethernet switch in the work through a super-class 5 wire, the workstation can access the entire network (that is, full connection) through the switch, but the access rate is much lower than expected, when viewing the switch interface statistics, you can detect that there are many ultra-small frames, with software to read the statistics of the workstation network card, found that there are Many FCS and frame alignment errors, what causes the machine to cause these errors?

  A. The rate mismatch between the workstation and the switch

  B. Interface mismatched to an 8021Qtrunk interface

  C. The line between the workstation and the switch has been completely damaged

  D. The operating mode between the workstation and the switch does not match

  E. The network interface card on the workstation is damaged

  Correct Answer: D

• Question 434:

  If there are multiple recipients in a multicast group, the administrator enables the IGMP- Snooping function on the switch connecting the recipient, and when the receiver receives the universal group query packet of the queryer from the switch, how should multiple recipients respond?

  A. The first recipient whose response time time expires sends the Report message, the other receivers do not.

  B. All recipients will respond to Report messages only if ICMPV2 is running.

  C. All recipients will respond to the Report message only if IGMPvl is running.

  D. All recipients will respond to the Report message

  Correct Answer: D

• Question 435:

  Which of the following parameters should be modified to re-establish the is-IS neighbor relationship?

  A. Modify the Cost value of the IS-IS interface

  B. Modify the send interval for the IlH of the IS-IS interface

  C. Modify the Level of the IS-IS interface

  D. Modify the IP address of the IS-IS interface

  Correct Answer: CD

• Question 436:

  Which of the following options is correct?

  A. Unicast and broadcasting cannot effectively achieve data transmission between one source and multiple destinations on P2MP, but multicast technology can

  B. Multicast technology is able to reduce redundant traffic, so network bandwidth can be saved C. Multicast technology is used for "-to-many" applications

  C. Since multicast is based on TCP to establish a connection, multicast technology can ensure the reliable transmission of data

  Correct Answer: BC

• Question 437:

  In order to reduce the number of OSPF routes in some unscheduled areas, the OSPF protocol has developed special area functions, and the following characteristic description of ospf special areas is correct?( Single choice questions).

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

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

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

  D. Special area routers cannot establish OSPF neighbor relationships with regular area routers

  Correct Answer: D

• Question 438:

  The duplicate address detection feature for NDP in the following description is incorrect?

  A. IPv6 unicast address is called a tentative address after it is assigned to an interface and before it is detected by duplicate addresses

  B. Duplicate address detection is implemented via RS and RA messages

  C. IPv6 duplicate address detection technology is similar to free ARP in IPv4

  D. The interface needs to perform duplicate address detection before enabling any of the unicast IPv6 addresses

  Correct Answer: B

• Question 439:

  If all the public IP addresses are used by a company's intranet users to access the Internet using NAT's No-pat method, what will happen to subsequent intranet users who access the Internet?

  A. automatically switch NAT to PAT after the Internet

  B. Subsequent intranet users will not be able to access the Internet

  C. Synchronize messages to other NAT conversion devices for NAT conversion

  D. Squeeze out the previous user and force NAT conversion to go online

  Correct Answer: B

• Question 440:

  In an Hw IP multicast network--which of the following multicast features are associated with (*, G) table entries? ( Multiple select)

  A. Dense mode

  B. Source tree

  C. Sparse mode

  D. PIM bidirectional E. Share the tree

  E. Dense Tree

  Correct Answer: CDE