Question 1

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 2

When deploying MPLS/BGP IP VPN, which of the following descriptions is wrong about using BGP to exchange routing information between PEs and CEs?

Options :

A : existCEIn the case of multi-homing, enableBGP ASThe number substitution function may cause routing loops that can be passed throughBGP SoDpreventVPNIntra-site routing loops

B : whenPEandCEbetweenBGPWhen exchanging routing information, if twoVPNThe autonomous system the site is in uses the same privateASnumber, can be passed throughASThe number replacement function is to use any specifiedASreplace the received private network route with theASnumber to preventASRoutes are discarded due to duplicate numbers

C : existHub&Spokescene, whenHub-CEandHub-PEuseIGPTimeSpoke-PEandSpake-CEcannot makeEBGP

D : whenPEandCEbetweenBGPWhen exchanging routing information, you do not need toPEPerform private network route import on theBGPoperation

Answer: B

Question 3

There is the concept of forwarding equivalence class FEC in MPLS. The following description is wrong:

Options :

A : MPLSGrouping packets with the same forwarding processing method is calledFEC

B : a forwarding equivalence classFECA unique label value is assigned on all routers

C : sameFECgrouped inMPLSThere will be different processing in the network

D : FECThe division is very flexible. Can be the source address, and the address, source port, destination port, protocol type or VPNEqual to any combination of division basis

Answer: B,C

Question 4

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 5

aboutOSPFWhich of the following statements is false?

Options :

A : For a pair of additional 0hers on an Ethernet link, it is normal to stop clearing in the 2-72 state

B : Stalling in ExStart state may be a bad match between neighbor routers

C : stagnantINThe it state indicates that the router has received the neighbor'sHello message. butHell messagedoes not include this routerOSPF Router ID

D : The two router databases are synchronized, SPFAn error occurred in the calculation, it must be because of the RouterID repeated

Answer: A

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