单选题When implementing MPLS VPNs between CE and PE routers, which of these statements is correct? As a Network Engineer, it is necessary for you to know how to implement MPLS VPNs between Customer Edge and Provider Edge routers. Refer to the following descriptions, which one is making sense?（）AIf using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistributionBIf using IS-IS as the PE-CE routing protocol, no redistribution is requiredCIf using static routes between the CE and PE routers, no redistribution of other VPN routes is requiredDIf PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required
单选题
When implementing MPLS VPNs between CE and PE routers, which of these statements is correct? As a Network Engineer, it is necessary for you to know how to implement MPLS VPNs between Customer Edge and Provider Edge routers. Refer to the following descriptions, which one is making sense?（）
A
If using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistribution
B
If using IS-IS as the PE-CE routing protocol, no redistribution is required
C
If using static routes between the CE and PE routers, no redistribution of other VPN routes is required
D
If PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required
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Which two routes do P routers see by default in a BGP MPLS VPN configuration? ()(Choose two.) A. IGP routes advertised by P routersB. IGP routes advertised by PE routersC. VPN routes advertised by PE routersD. VPN routes advertised by CE routers
Which type of VPN router is not required to run MPLS?() A. Provider Core (P)B. Provider Edge (PE)C. Customer Edge (CE)D. Customer Boundary (CB)
Which two mechanisms control route distribution between PE routers in a 2547bis VPN?() A. site idB. policiesC. circuit idD. extended communities
Which two of these are characteristics of MPLS VPNs?() A. Layer 3 MPLS VPNs can forward only IP packetsB. Layer 2 MPLS VPNs can forward any network protocolC. MPLS label paths are automatically formed based on Layer 2 framesD. Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesE. In Layer 2 MPLS VPNS, the service provider controls the customer Layer 3 policies
If the OSPF protocol is used to connect customer edge （CE） routers to service provider edge（PE） routers in the VPN backbone， which two options best describe the use of SHAM links？（）A、A sham-link is created between any twoo VPN sites that belong to the same OSPF area and share an OSPF backdoor linkB、A sham-link is seen as an intra-area link between PE routers，an OSPF adjacency is created and data base is exchangedC、A SHAM link is created between two directly connected PE routers so that it is preferred over the low speed backdoor doorD、A SHAM link is part of OSPF network of MPLS-VPN provider
What is a reason for implementing MPLS in a network？（）A、MPLS eliminates the need of an IGP in the core.B、MPLS reduces the required number of BGP-enabled devices in the core.C、Reduces routing table lookup since only the MPLS core routers perform routing table lookups.D、MPLS eliminates the need for fully meshed connections between BGP enabled devices.
Which statement is correct about an OSPF sham-link？（）A、A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.B、A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.C、A sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.D、A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.E、A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
When implementing MPLS VPNs between CE and PE routers, which of these statements is correct? As a Network Engineer, it is necessary for you to know how to implement MPLS VPNs between Customer Edge and Provider Edge routers. Refer to the following descriptions, which one is making sense?（）A、If using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistributionB、If using IS-IS as the PE-CE routing protocol, no redistribution is requiredC、If using static routes between the CE and PE routers, no redistribution of other VPN routes is requiredD、If PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required
Which four statements about the Carrier Supporting Carrier （CSC） feature are true？ （）A、MPLS is required between the PE and CE routers that connect the backbone carrier to the customer carrier.B、The backbone carrier must enable the PE router to check that the packets it receives from the CErouter contain only the labels that the PE router advertised to the CE router.C、Every packet that crosses the backbone carrier must be encapsulated so that the packet includes MPLS labelsD、AII PE routers that link the backbone carrier to the customer carrier must run Route Target Rewrite.E、Arouting protocol is required between the PE and CE routers that connect the backbone carrierto thecustomer carrier. The routing protocol enables the customer carrier to exchange IGP routing information with the backbone carrier.
When BGP is used as the PE-CE routing protocol, which of these statements is correct?（）A、On the CE router, PE neighbors must be configured in the VRF context on the CE routerB、On PE routers, the CE IBGP neighbors are configured in the global BGP configurationC、On PE routers, the CE EBGP neighbors are configured in the VRF contextD、A separate BGP process must be used on the PE routers for CE routers so that they do not use the same BGP routing process as that used for the PE router's other provider neighbors
Which three functions can CCC be used for？（）A、To interconnect VLANSB、To interconnect ATM VCsC、To interconnect MPLS LSPsD、To interconnect MPLS VPNs
Which two statements about Layer 3 MPLS VPN are true？（）A、The virtual routing and forwarding table is separate from the global routing table that exists on PE routers. Routes are injected into the VRF from the CE-PE routing protocols for that VRF and any MP-BGP announcements that match the defined VRF RTsB、Multiprotocol Border Gateway Protocol is run between PE and CE routers to exchange customer prefixes in a VPNv4 formatC、A customer edge router peers at Layer 3 to the provider edge. The PE-CE interface runs either a dynamic routing protocol （eBGP， RIPv2， EIGRP， OSPF） or a static routing protocol （Static， Connected）D、VPNv4 address is the combination of the RT and customer IPv4 prefix. These VPNv4 prefixes are passed in MP-BGP
Which two of these are characteristics of MPLS VPNs？ （）A、 Layer 3 MPLS VPNs can forward only IP packetsB、 Layer 2 MPLS VPNs can forward any network protocolC、 MPL S label paths are automatically formed based on Layer 2 framesD、 Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesE、 In Layer 2 MPLS VPNS， the service provider controls the customer Layer 3 policies
When implementing MPLS VPNs between CE and PE routers, which of these statements is correct? （）A、If using IS-IS as the PE-CE routing protocol, no redistribution is required.B、If using static routes between the CE and PE routers, no redistribution of other VPN routes is required.C、If the PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required.D、If RIP is the routing protocol that is used between the PE-CE routers, no redistribution is required, but any other protocol will require redistribution.E、If using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistribution.
Which two of these are characteristics of MPLS VPNs?（）A、Layer 3 MPLS VPNs can forward only IP packetsB、Layer 2 MPLS VPNs can forward any network protocolC、MPLS label paths are automatically formed based on Layer 2 framesD、Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesE、In Layer 2 MPLS VPNS, the service provider controls the customer Layer 3 policies
Which two routes do P routers see by default in a BGP MPLS VPN configuration? （）(Choose two.)A、IGP routes advertised by P routersB、IGP routes advertised by PE routersC、VPN routes advertised by PE routersD、VPN routes advertised by CE routers
多选题Which four statements about the Carrier Supporting Carrier （CSC） feature are true？ （）AMPLS is required between the PE and CE routers that connect the backbone carrier to the customer carrier.BThe backbone carrier must enable the PE router to check that the packets it receives from the CErouter contain only the labels that the PE router advertised to the CE router.CEvery packet that crosses the backbone carrier must be encapsulated so that the packet includes MPLS labelsDAII PE routers that link the backbone carrier to the customer carrier must run Route Target Rewrite.EArouting protocol is required between the PE and CE routers that connect the backbone carrierto thecustomer carrier. The routing protocol enables the customer carrier to exchange IGP routing information with the backbone carrier.
多选题Which two mechanisms control route distribution between PE routers in a 2547bis VPN?（）Asite idBpoliciesCcircuit idDextended communities
多选题When HSRP is configured on a network, which two of these items are provided, which are shared between the routers that run HSRP ?（） (choose two)AShared single interfaceBIP AddressCTCP-based hello packetsDMAC address
多选题Which three functions can CCC be used for？（）ATo interconnect VLANSBTo interconnect ATM VCsCTo interconnect MPLS LSPsDTo interconnect MPLS VPNs
单选题Which type of VPN router is not required to run MPLS?（）AProvider Core (P)BProvider Edge (PE)CCustomer Edge (CE)DCustomer Boundary (CB)
单选题Which statement about implementing the Cisco IPv6 provider Edge Router over MPLS is true？（）A6PE feature is supported over tunnels other than RSVP-TE tunnelsBCore MPLS routers are supporting IPv6 ONLYC6PE feature is not supported over tunnels other than RSVP-TE tunnelsDCore MPLS routers are supporting IPv4 only
单选题Which statement is correct about an OSPF sham-link？（）AA sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.BA sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.CA sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.DA sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.EA sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
单选题When EIGRP is used as the PE-CE routing protocol which of these statements is correct?（）AEIGRP can be used only as the PE-CE routing protocol if the PE and CE routers are in the same ASBOther EIGRP AS routes are automatically advertised to the CE router and do not require a redistribution configuration command to be configuredCUnlike other routing protocols that are used between PE and CE routers, EIGRP supports backdoor linksDConfigure of the VPN is only required on the PE router
单选题When BGP is used as the PE-CE routing protocol, which of these statements is correct?（）AOn the CE router, PE neighbors must be configured in the VRF context on the CE routerBOn PE routers, the CE IBGP neighbors are configured in the global BGP configurationCOn PE routers, the CE EBGP neighbors are configured in the VRF contextDA separate BGP process must be used on the PE routers for CE routers so that they do not use the same BGP routing process as that used for the PE router's other provider neighbors
多选题If the OSPF protocol is used to connect customer edge （CE） routers to service provider edge（PE） routers in the VPN backbone， which two options best describe the use of SHAM links？（）AA sham-link is created between any twoo VPN sites that belong to the same OSPF area and share an OSPF backdoor linkBA sham-link is seen as an intra-area link between PE routers，an OSPF adjacency is created and data base is exchangedCA SHAM link is created between two directly connected PE routers so that it is preferred over the low speed backdoor doorDA SHAM link is part of OSPF network of MPLS-VPN provider
单选题When implementing MPLS VPNs between CE and PE routers, which of these statements is correct? As a Network Engineer, it is necessary for you to know how to implement MPLS VPNs between Customer Edge and Provider Edge routers. Refer to the following descriptions, which one is making sense?（）AIf using OSPF or EIGRP as the PE-CE routing protocol, redistribution is not required, but any other protocol or static route will require redistributionBIf using IS-IS as the PE-CE routing protocol, no redistribution is requiredCIf using static routes between the CE and PE routers, no redistribution of other VPN routes is requiredDIf PE-CE protocol is not BGP, redistribution of other VPN routes from MP-BGP is required
单选题What is a reason for implementing MPLS in a network？（）AMPLS eliminates the need of an IGP in the core.BMPLS reduces the required number of BGP-enabled devices in the core.CReduces routing table lookup since only the MPLS core routers perform routing table lookups.DMPLS eliminates the need for fully meshed connections between BGP enabled devices.