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Q81. You are designing a network for a branch office. In order to improve convergence time, you are required to use the BFD feature. Which four routing protocols can you use to facilitate this? (Choose four.)
Q82. Refer to the exhibit.
You must ensure that both core A and core B devices have only the minimum information required for reaching the spoke routers yet maintain full reachability during network failures.
Which of the following design solutions accomplishes these requirements?
A. Route summarization, with specific route leaking on hubs A and B
B. Route summarization, with GRE tunnel on hubs A and B
C. Implement PfR enhancements on hubs A and B.
D. Implement ODR for hub-to-spoke routing.
Q83. In an OSPF network, users in a particular OSPF non-backbone area are complaining about slow access speeds to a shared corporate resource in another OSPF area. Traceroutes show that theusers are taking a suboptimal default route to the destinations. Which solution will improve access speed?
A. Make the area totally stubby so that the default can be followed along the best path.
B. Create a virtual link between the areas so that traffic can shortcut directly between them.
C. Implement policy routing to channel the traffic in the optimal direction.
D. Leak specific summaries on the ABRs for the remote subnets in addition to the default.
Q84. A service provider creates a network design that runs MPLS in its WAN backbone using OSPF as the IGP routing protocol. What would be two effects of additionally implementing MPLS-TE? (Choose two.)
A. MPLS-TE is required to reroute traffic within less than 1 second in case of a link failure inside the backbone.
B. MPLS-TE is required to route different MPLS QoS service classes through different paths.
C. MPLS-TE and OSPF cannot be used together inside one MPLS network.
D. MPLS-TE cannot use OSPF for the traffic path calculation.
E. MPLS-TE is required to create backup paths independently from the IGP.
Q85. Refer to the exhibit.
This new OSPF network has four areas, but the hub-and-spoke area experiences frequent flapping. You must fix this design failure. Which two mechanisms can you use to isolate the data center area from the hub-and-spoke area without losing IP connectivity? (Choose two.)
A. Make the DC area totally stub.
B. Make the DC area an NSSA.
C. Convert the DC area to EIGRP protocol.
D. Deploy a prefix summarization on router D.
E. Use OSPF distribute-list filtering on router A.
Q86. You work as a network designer for a company that is replacing their Frame Relay WAN with an MPLS VPN service, where the PE-to-CE routing protocol is BGP. The company has 3000 routes in their distribution routers, and they would like to advertise their access routers through the MPLS network. Their service provider, however, only supports 1000 prefixes per VRF. Which two design solutions can be applied to ensure that your access routers will be able to reach all devices in your network? (Choose two.)
A. Use prefix lists on your distribution routers to control which routes are sent to the MPLS network.
B. On your distribution routers, configure null routes and aggregate routes for the prefixes in your network.
C. Configure your distribution routers to send a default route to the MPLS network.
D. Summarize the routes on the MPLS WAN interfaces of your distribution routers.
Q87. Your company requires two diverse multihop External Border Gateway Protocol peerings to a partner network. Which two methods would you use to improve lost peer detection? (Choose two.)
A. Use Bidirectional Forwarding Detection for the peers.
B. Use Selective Address Tracking and match the peers.
C. Use subsecond keepalives for the peers.
D. Use subsecond hold timers for the peers.
E. Use Fast Peering Session Deactivation for the peers.
F. Use subsecond minimum route advertisement Interval timers for the peers.
Q88. When creating a design plan for IPv6 integration, you decide to use stateless encapsulation of IPv6 packets into IPv4 tunnels between subscriber CPEs and a border relay. Which deployment technique allows for this functionality?
B. Dual-Stack Lite
Q89. When designing a network, which two security features should be added to the design to protect hosts from potential IPv6 neighbor discovery denial of service attacks at the access layer? (Choose two.)
B. RA Guard
Q90. A company plans to use BFD between its routers to detect a connectivity problem inside the switched network. An IPS is transparently installed between the switches. Which packets should the IPS forward for BFD to work under all circumstances?
A. IP packets with broadcast IP source addresses
B. IP packets with identical source and destination IP addresses
C. fragmented packets with the do-not-fragment bit set
D. IP packets with the multicast IP source address
E. IP packets with the multicast IP destination address
F. IP packets with the destination IP address 0.0.0.0