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2016 Jun 642-889 Study Guide Questions:
Q41. RAG DROP
Q42. Refer to the partial Cisco IOS XR PE router configuration exhibit for supporting a Layer 3 MPLS VPN customer using BGP as the CE-to-PE routing protocol.
The service provider AS number is 64500, the customer AS number is 64501, and the customer CE router is 10.1.1.1. What is missing in the configuration?
A. The route distinguisher has not been configured under router bgp 64500 vrf Customer_A.
B. The import and export route targets have not been configured under router bgp 64500 vrf Customer_A.
C. The 10.1.1.1 BGP neighbor has not been activated for IPv4 unicast routing.
D. The 10.1.1.1 BGP neighbor has not been activated for the VPNv4 address family.
Q43. When configuring an EoMPLS PW on a Cisco IOS XR router, what are the two supported transport modes? (Choose two.)
A. ethernet (Ethernet port mode)
B. ip (routed mode)
C. vlan (VLAN-tagged mode)
D. transparent (bridged mode)
Updated 642-889 labs:
Q44. What is an advantage of using the Cisco EVC infrastructure to implement carrier-class Ethernet services that are not available on non-EVC-capable platforms?
A. PW redundancy
B. interworking support
C. PW stitching support
D. flexible frame-matching support and VLAN tag manipulation
E. local cross-connect support
Q45. In Layer 3 MPLS VPN implementations, if some of the VPNv4 routes on one PE router do not appear on another PE router, what could be the problem?
A. RD mismatch between the PE routers
B. RT export and import configuration errors
C. RD export and import configuration errors
D. VRF name mismatch between the PE routers
Q46. Which VPN technology uses the Group Domain of Interpretation as the keying protocol and IPsec for encryption that is often deployed over a private MPLS core network?
B. GET VPN
C. SSL VPN
Precise 642-889 labs:
Q47. In MPLS Layer 3 VPN implementations, which mechanism is used to control which routes are imported to a VRF?
C. VC ID
D. PW ID
E. VRF ID
Q48. When using the Cisco EVC software infrastructure, a double-tagged frame with a customer VLAN of 10 and a service provider VLAN of 150 will be best matched by which encapsulation configuration?
A. encapsulation dot1q 10 second-dot1q any
B. encapsulation dot1q 10 second-dot1q 150
C. encapsulation dot1q 10 second-dot1q 50-200
D. encapsulation dot1q 10
E. encapsulation dot1q 150
Q49. When implementing MPLS Layer 3 VPN services, which CE-PE routing method does not require the use of the redistribute command to enable the customer routes to be advertised through the MPLS cloud between the customer sites?
E. static routing
F. OSPF or IS-IS
Q50. When implementing Layer 3 MPLS VPNs on Cisco IOS/IOS XE PE routers, which PE-to-CE routing protocol requires a separate routing process to be created for each VRF?