Command IP as-path-filter1 permit^12,*74$ can match to which AS_PSTH?

• A.AS_PATH(32127423)
• B.AS_PATH(125 328 74 23)
• C.AS_PATH(321122374)
• D.AS PATH Q236217 ? 2374)

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IPsecuses anasymmetric encryption algorithmto encrypt thesymmetric algorithm key, which it uses to encrypt
/decrypt data, ensuring security and performance.

• A.TRUE
• B.FALSE

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The multicast IP address is 2291301301, and its corresponding MAC address is :(Multilist)

• A.01-00-5E-82-82-01
• B.01-00-5E-O2-82-01
• C.00-00-5E-02-82-01
• D.00-00-5E-82-82-01

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How do 8021w and 8021D handle BPDUs?( Confirmed) The

• A.8021D bridge only forwards BPDU packets received from the root bridge
• B.8021w Bridge does not forward BPDU packet
• C.The 8021D bridge does not forward BPDU messages
• D.The 8021w bridge forwards only BPDU packets received from the root bridge

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On the bearer WAN shown in the figure,SR (Segment Routing)is deployed, and the controller is used to compute paths. Drag network technologies on the left to the corresponding application locations on the right.

Correct Answer:

Explanation:
Comprehensive and Detailed In-Depth Explanation:
The diagram shows aWAN networkwhereSegment Routing (SR)is used in conjunction with theiMaster NCEcontroller. The network consists ofData Centers (DCs),Branches,Provider Edge (PE)routers, andRoute Reflectors (RR)withinAS 65600. Let's analyze each network technology and its placement in the scenario.
1. BGP-LS (Border Gateway Protocol - Link State):
Application Location:1 (PE to RR)
BGP-LS is used tocollect and distribute network topology informationfrom theIGP (Interior Gateway Protocol)domain.
It enables theiMaster NCE(controller) to learn about the network topology and SR information from PE routers.
The PE routers send theirlink-state informationto theRRusingBGP-LS.
Why Location 1:
The RR collects topology data from PEs and forwards it to the controller for path computation.
2. BGP (Border Gateway Protocol):
Application Location:2 (RR to iMaster NCE)
Standard BGP is used forroute distributionandnetwork connectivity.
The RR usesBGPto exchange route information with thecontroller(iMaster NCE).
Why Location 2:
TheRRaggregates routes and exchanges them with the iMaster NCE for centralized management.
3. MP-IBGP (Multiprotocol Internal BGP):
Application Location:3 (PE to PE)
MP-IBGP is used toexchange VPNv4 and VPNv6 routesbetween PE routers within thesame AS.
It allows PEs toadvertise VPN routesacross thebackbone network.
Why Location 3:
PEs need to communicate VPN-related information within the AS, ensuring end-to-end connectivity between DCs and branches.
4. BGP SR-Policy/PCEP (Path Computation Element Protocol):
Application Location:4 (iMaster NCE to PE)
BGP SR-Policy andPCEPare used by thecontrollertodistribute SR policiesto the PE routers.
TheiMaster NCEcalculates optimal paths and sends the SR policies to PEs viaBGP SR-PolicyorPCEP.
Why Location 4:
The controller programs theSegment Routing pathsdirectly to the PEs for optimal traffic engineering.
Why This Mapping Is Correct:
The mapping is based on theroles and functions of each protocolwithin theSR-based WAN architecture. The controller uses BGP-LS to learn topology, BGP for route reflection, MP-IBGP for VPN route exchange, and BGP SR-Policy/PCEP for path computation and distribution.

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