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Q1. Your design client has requested that you ensure that the client devices are not dynamically configured with incorrect DNS information. When finalizing the network design, which security option must be configured on the switches? 

A. IGMP snooping 

B. DHCP snooping 

C. root guard 

D. DNS snooping 

Answer:

Q2. A service provider has a Resilient Ethernet Protocol ring running as a metro backbone between its locations in one city. A customer wants to connect one site with one box redundant to theResilient Ethernet Protocol ring at two different service provider locations. How can this be done without producing any Layer 2 loops within the network design? 

A. Spanning tree at the service provider side only must be enabled. 

B. Spanning tree at the customer side only must be enabled. 

C. Flex Links at the service provider side only must be enabled. 

D. Flex Links at the customer side only must be enabled. 

E. EtherChannel at the service provider side and the customer side must be enabled. 

F. Spanning tree at the service provider side and the customer side must be enabled. 

G. Flex Links at the service provider side and the customer side must be enabled. 

Answer:

Q3. You are the lead IP network designer for a new service provider called XYZ, and you are working closely with the CTO to finalize design requirements. The CTO informs you that they want to transport IPv6 prefixes of customers through the XYZ network at this time; however, they need your advice on whether to deploy dual stack or MPLS 6PE/6VPE. Which two options do you recommend? (Choose two.) 

A. Build a dual-stack network. Enable BGP in the core. Redistribute EBGP routes into IGP. 

B. Use MPLS 6PE to simplify the operation and keep a BGP-free core. When the LDPv6 becomes available, change to 4PE or keep the core using both IPv4 and IPv6. The main goal is to keep the core BGP-free and ensure that IPv4, IPv6, VPNv4, and VPNv6 are all label-switched. 

C. Use MPLS 6VPE to simplify the operation and keep a BGP-free core. When the LDPv6 becomes available, change to 4PE or keep the core using both IPv4 and IPv6. The main goal is to keep the core BGP-free and ensure that IPv4, IPv6, VPNv4, and VPNv6 are all label-switched. 

D. Prepare the dual-stack infrastructure from the beginning, even if BGP prefixes would have to be announced via IPv4 in case you decide to maintain the BGP-free core. 

Answer: BD 

Q4. Which multicast technology provides a large, many-to-many connectivity for a new application while minimizing load on the existing network infrastructure? 

A. Bidirectional PIM 

B. PIM Sparse Mode 

C. Any-source Multicast 

D. Source Specific Multicast 

Answer:

Q5. Which two mechanisms ensure that a network design provides fast path failure detection? (Choose two.) 

A. BFD 

B. fast hello packets 

C. UDLD 

D. IP Cisco Express Forwarding 

Answer: AB 

Q6. Company A has grown nationwide in the U.S., and each new remote branch has a Metro Ethernet circuit provisioned back to the data center at the headquarters on the West Coast. The operations team says that it cannot manage hundreds of circuits as the company continues to grow. You review the topology and notice that many of the branches are close to each other in geographical zones. How can you redesign this network to improve manageability and increase scalability? 

A. Add an aggregation layer router in each geographical zone. 

B. Add a redundant data center on the East Coast to serve some of the traffic there. 

C. Add a default route in each branch toward the data center on the West Coast. 

D. Use Optimized Edge Routing at the data center. 

E. Build an overlay MPLS network with Layer 3 VPN. 

Answer:

Q7. You are designing an Out of Band Cisco Network Admission Control, Layer 3 Real-IP Gateway deployment for a customer. Which VLAN must be trunked back to the Clean Access Server from the access switch? 

A. untrusted VLAN 

B. user VLAN 

C. management VLAN 

D. authentication VLAN 

Answer:

Q8. You are designing a NAC OOB Layer 3 Real-IP Gateway deployment for a customer. Which VLAN must be trunked back to the Clean Access Server from the access switch? 

A. untrusted VLAN 

B. user VLAN 

C. management VLAN 

D. authentication VLAN 

Answer:

Q9. When network summaries are created for access networks in a network design, how does it change the behavior of the Shortest Path First (SPF) running in a backbone area? 

A. There would be fewer incremental SPFs. 

B. There would be fewer partial SPFs. 

C. There would be fewer full SPFs. 

D. There would be no change with the SPFs. 

Answer:

Q10. 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. 

Answer: