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Q51. Refer to the exhibit. The configuration in the exhibit redistributes static route 172.16.0.0/24 into BGP. Which action does the route-map STATIC-TO-BGP do?
A. Route 172.16.0.0/24 cannot be sent to the Internet.
B. Route 172.16.0.0/24 cannot be re-advertised beyond its neighbors.
C. Route 172.16.0.0/24 cannot be advertised outside of AS 100.
D. Route 172.16.0.0/24 cannot be exported from BGP to another protocol.
Answer: C
Q52. Which are the three benefits of using the Yang model? (Choose three.)
A. Reduce lab footprint
B. Improve access to resources
C. Support interoperability that provides a standard way to model management data
D. Support simplified network management applications
E. Provide a scale virtual lab environment
F. Support programmatic interfaces
Answer: C,D,F
Explanation: https://tools.ietf.org/html/rfc6020#page-11
Q53. Refer to the exhibit.
ABC and XYZ MPLS VPN customers are accruing Internet access. Both CEs are sending traffic to the Internet. Which statement about their connectivity is true?
A. Both CEs will have connectivity.
B. Only CE-XYZ will have connectivity.
C. Neither CEs will have connectivity, as both CEs are using the same NATed subnet.
D. Only CE-ABC will have connectivity.
E. Neither CEs will have connectivity, as IAR does not have route back to the NATed subnet.
Answer: D
Q54. What are two advantages of Cisco IOS XR Software over Cisco IOS Software? (Choose two.)
A. a configuration that is grouped by interface
B. a configuration that is grouped by process
C. one-stage configuration
D. a monolithic OS
E. a two-stage configuration
Answer: B,E
Q55. Which is the main characteristic of LTE architecture compared to other mobile architectures?
A. Provides supports to deploy Layer 3 MPLS VPN model, where other mobile architectures do not support.
B. Offers node redundancy with the static route configured on the IP NodeB using the HSRP/VRRP virtual ip address.
C. Provides a simpler, less hierarchical model with the capability of simplistically distributing the core gateways.
D. Introduces a hierarchical model with connection-oriented service requirements and one-to-one relationships.
Answer: C
Explanation: https://books.google.co.in/books?id=-fyjBAAAQBAJ&pg=PA50&lpg=PA50&dq=LTE+Provides+a+simpler,+less+hierarchical+mo del+with+the+capability+of+simplistically+distributing+the+core+gateways.&source=bl&ots =Bwpk3CQ_jN&sig=2-kgrCA_7hEX3kuvSxWVV2AnAS0&hl=en&sa=X&ved=0CB0Q6AEwAGoVChMI_5La8tbCx wIVgZ6OCh1N7gHa#v=onepage&q=LTE%20Provides%20a%20simpler%2C%20less%20 hierarchical%20model%20with%20the%20capability%20of%20simplistically%20distributing %20the%20core%20gateways.&f=false
Q56. Which are the four key design requirements for mobile IP backhaul? (Choose four)
A. network timing distribution and recovery
B. MPLS-enabled interface
C. Layer 2 Tunneling
D. X2 interface turning point
E. DiffServ QoS
F. bandwidth
G. native IPv6 support
H. mandatory Layer 3 access up to a cell site
Answer: A,B,E,H
Q57. An engineer is troubleshooting L3VPN traffic loss over the MPLS-enabled core network when new core links were enabled. Assuming that the IGP is properly configured, which issue causes a temporary data flow blackholing when the IGP and LDP reconvenes?
A. LDP is a Layer 2 protocol forwarding label packets before the IGP reconvened.
B. IP packets are forwarded as soon as routes are learned over a new IGP adjacency before the label exchange happens over the new links
C. MP-BGP sessions between PE and RR routers require extra time to reconverge than the underlying IGP.
D. MPLS-TE tunnels without LDP adjacencies are used over the new links black-holing the traffic before the LDP label exchange is completed
Answer: B
Q58. Refer to the exhibit.
OSPF is already running with the default OSPF parameters. R1 has added a new subnet (loopback 11). What will occur in regards to SPT computing on R2 router?
A. Adding ispf command on R2 router, the entire SPT will be computed on R2 router.
B. Because 10.11.11.11/32 prefix information will be in a LSA type 3 on R2 router's OSPF database, R2 router will run partial SPF computation.
C. Adding ispf command on R2 router, R2 router will recompute only the affected part of tree.
D. Because 10.11.11.11/32 prefix will be a LSA type 1 on R2 router's OSPF database. R2 router will always run a full SPF computation, even though an OSPF optimization is applied on R2 router.
Answer: C
Q59. In which way does the DS-Lite IPv6 transitioning mechanism differ from IPv6 Dual-Stack?
A. DS-Lite is a combination of tunnel and translation technologies.
B. DS-Lite is a transition technology that gives full IPv6 connectivity for IPv6 capable hosts that are on the IPv4 Internet but have no native connection to an IPv6 network.
C. DS-Lite is an automatic tunnel where the tunnel destination is determined by the IPv4 address extracted from the IPv6 address that starts with the prefix 2002::/16.
D. DS-Lite is a stateless tunneling mechanism with a lightweight and secure manner without requiring upgrades to existing IPv4 access network infrastructure.
Answer: A
Explanation: http://www.cisco.com/c/en/us/products/collateral/service-provider/carrier-grade-ipv6-solution/white_paper_c11-558744-00.html
Q60. Refer to the exhibit.
MPLS VPN service has been provisioned for a customer by using inter-AS MPLS Option C. It is possible to redistribute ISP1 and ISP2 received loopback addresses into the local IGP. How many labels are associated with packet forwarding between the ASBRs?
A. 0
B. 1
C. 2
D. 3
E. 4
Answer: C
