Huawei Huawei Certifications H12-831 Questions & Answers

• Question 161:

  As shown, all routers run OSPF. Which of the following statements is correct?

  

  A. R2in the area1and area0will generateRouter LSA

  B. R2WillR3GeneratedRouter LSAforward toR1

  C. R2WillR1GeneratedRouter LSAforward toR3

  D. R2only in area0generated inRouter LSA

  Correct Answer: A

• Question 162:

  In an MPLS network, functions such as neighbor discovery, session establishment and maintenance, and label management are implemented by exchanging LDP messages between SRs running the DP protocol. To ensure the reliability of message delivery, all LDP messages are sent and received based on TCP connections.

  A. True

  B. False

  Correct Answer: B

• Question 163:

  By default, which of the following types of secure MA, C addresses will be lost when the device restarts?

  A. black holeMA, Caddress

  B. Sticky MA, Caddress

  C. Security DynamicsMA, C 1W D. Safe staticMA, Caddress

  Correct Answer: C

• Question 164:

  As shown in the figure, MPLS LSP is set up in the network, and the goal is to establish an LDP session between SWA and SWB.

  

  A. Configured correctly

  B. No global enable requiredMPLS

  C. No need to enable on the portMPLS

  D. two devicesmpls Isr-idcannot be configured the same

  Correct Answer: D

• Question 165:

  From this picture, we can judge

  

  A. R1ofGE0/0/1definitely haveLevel-2ability

  B. R1ofGE0/0/0definitely haveLevel-2ability

  C. R1definitely existsLevel-2ofLSDB

  D. R1have2indivualIS-ISNeighbor

  Correct Answer: ABCD

• Question 166:

  As shown in the figure, OSPF is enabled on all interfaces of the router, in which R4 and R5 can establish OSPF virtual connections.

  

  A. True

  B. False

  Correct Answer: B

• Question 167:

  In the VLAN aggregation technology, multiple Sub-VLANs are used to isolate wide-open domains, and these Sub-VLANs are aggregated.

  Synthesizing a logical Super-VLAN, a company divides different departments into different Sub-VLANs, because Sub-VL AN not only includes physical connection, but also can establish three-layer VLAN ANIF interface, which can directly carry out three-layer communication with external network.

  A. True

  B. False

  Correct Answer: B

• Question 168:

  Deploying port isolation technology in Ethernet can realize Layer 2 intercommunication and Layer 3 isolation, making networking more flexible.

  A. correct

  B. mistake

  Correct Answer: B

• Question 169:

  OSPFV2 is an IGP running on an IPv4 network; OSPFV3 is an IGPo running on an IPv6 network. The basic working mechanism of OSPFv3 is the same as that of OSPFV2, such as the election of DR and B, DR. As shown in the figure, an engineer uses 3 routers to test IPv6 services. He wants to realize the interconnection of IPv6 networks by running OSPFV3.

  Which of the following statements about the election of the network DR is correct?

  

  A. After the network converges, engineers modifyR1the priority is100,R2the priority is10,R3Keep the default value. When the network converges again,R1forDR, R2forB, DR

  B. After the network converges, a new device is added to the broadcast linkR4,R4the priority is150. When the network converges again,R4forDR

  C. After the network convergesR1Power off and restart, when the network converges again,R3forDR

  D. After the network converges,R1forDR

  Correct Answer: C

• Question 170:

  Since BGP is an EGP routing protocol, BGP routing policies can only be deployed between EBGP neighbors. The routing policy deployed between IBGP neighbors is invalid.

  A. True

  B. False

  Correct Answer: B