Question 1

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?

Options :

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

Answer: C

Question 2

According to this diagram, can we break the

Options :

A : system-IDforee8c.a0c2.baf2The device' whose type isLevel-1

B : system-IDforee8c.a0c2.baf2device whose type isLevel-1-2

C : R4belong only toLevel-1

D : R4dry onlyLevel2

Answer: B,C

Question 3

What is the purpose of configuring LSP fragmentation on an IS-IS device?

Options :

A : make the device unbuildableIS-ISNeighbor

B : enable the device to support moreIS-ISrouting entry

C : make the device unable to learnIS-ISrouting information

D : no real purpose

Answer: B

Question 4

IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculation. As shown in the figure, a campus deploys both IPv4 and IPv6 and runs IS-IS to achieve network interconnection. R2 only supports IPv4. Which of the following statements is true about the topology calculation of this network?

Options :

A : If you want IPv4 and IPv6 network computation to form the same shortest path tree, you need to run the ipv6 enable topology ipv6 command to enable the IPv6 capability in the IS-IS process.

B : By default, since R2 does not support IPv6, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R3-R4

C : By default, IPv4 and IPv6 networks will be calculated separately to form different shortest path trees

D : By default, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R2-R4. Since R2 does not support IPv6, R2 will directly discard IPv6 packets after receiving them, causing traffic loss.

Answer: B

Question 5

The cutover risk assessment mainly considers which of the following aspects?

Options :

A : loss from risk

B : Scope of Risk Impact

C : time of risk

D : Location of key risk points

Answer: A,B,C,D

Free H12-831_V1.0 Mock Exam – Practice Online Confidently

Buying Options: