Huawei Huawei Certifications H12-891 Questions & Answers

• Question 111:

  As shown in the following topology, EBGP is running between AS100, AS200, AS300, AS400, and the neighbor relationship is established S400 When you receive a BGP route from ASI00 for a 1.1.1.1/32 network segment, is the path order recorded in the ASPath properties correct?

  

  A. 10,200,3

  B. 400,300,200,100

  C. 100, 200,300, 400

  D. 300, 200,100

  Correct Answer: D

• Question 112:

  The following description of 8021S deployment characteristics is correct?( Multiple choice question)

  A. All VLANs share a spanning tree instance

  B. Multiple bridges share a spanning tree instance

  C. Each VLAN has one spanning tree instance

  D. Multiple VLANs share a spanning tree instance

  Correct Answer: D

• Question 113:

  QinQ technology is a technology that extends the VLAN space by adding a layer of 8021Q tag messages to the extended VLAN. The function of space, the following statement about QInQ is mispronounced?

  A. basic QinQ is implemented based on the interface orientation

  B. QinQ increases the number of VLANs to 4095*4095

  C. Flexible QinQ can be based on different inner layerS Tag and different outer layers of Tag, for user VL The division of AN is more granular

  D. QinQ technology enables private VLANs to pass through the public Network

  Correct Answer: B

• Question 114:

  The correct statement about the VRRP protocol version is?

  A. VRRPv2 is only available for IPv4

  B. VRRPv3 does not support authentication

  C. VRRPv2 supports authentication

  D. VRRPv3 is only available for IPv6

  Correct Answer: ABC

• Question 115:

  A campus deployed both IPv4 and IPv6 networks for service testing, and ran IS-S to interconnect the networks. (The S-S routing protocol has good scalability and is widely used in the live network.) Regarding IS-IS extensibility, which of the following statements is true?

  A. In order to support IPv6, IS-IS needs to add TLV to carry IPv6 address information

  B. IS-IS uses the TLV structure to build messages, making lS-IS more flexible and extensible

  C. NLPID is a new type of TLV added by IS-IS to support IPv6

  D. For IS-IS, adding new features simply adds a new TLV to

  Correct Answer: ABD

• Question 116:

  As shown in the topology diagram, all interfaces of the router in the figure are enabled with the ISIS protocol, and the following statement is correct.

  

  A. If the RI's Ethernet0/0/0 interface goes down, R2 becomes the master device

  B. If the Ri's Ethernet0/0/1 interface goes down, R2 becomes the master device

  C. If R3's G E0/0/0 interface goes down, R2 becomes the master device

  D. If R3's Ethernet0/0/0 interface goes down, then R2 becomes the master device

  Correct Answer: ABC

• Question 117:

  The following statement about RSTP root protection is correct?

  A. Turning on root protection on the root port takes effect

  B. The port that turns on the root protection receives the RST BDPU with a higher priority and will enter the error-down state

  C. It is recommended that you turn it on on a switch that is at the edge of the network

  D. After opening the root-protected port and receiving the RSTBPDU with a higher priority, if it does not continue to receive the RSTBPDU with a higher priority for a period of time, it will return to the normal forwarding state

  Correct Answer: CD

• Question 118:

  The authentication types of ISIS include interface authentication, zone authentication, and routed domain authentication

  A. True

  B. False

  Correct Answer: A

• Question 119:

  In which of the following cases, RSTP refreshes the MAC address table?( Multi-select)

  A. When the port state transitions from Forwarding to Disking

  B. Only when the port state transitions from Listening to Disccarding

  C. When a topology change notification is received

  D. When the status of a port changes

  E. CE when the port state transitions from Disking to Forwarding

  Correct Answer: CE

• Question 120:

  For a non-directly connected EBGP neighbor to establish properly, what configurations must be included as follows?

  A. peer ebgp-max-hop

  B. peer ignore

  C. peer as-number

  D. peer connect-interface

  Correct Answer: AC