Q1. Tesla Radio GmbH is going to build a new research lab network based on a set of switches that would connect to their existing enterprise network. They are considering a design that would guarantee loop-free behavior within the set of switches. The design would also allow the group of switches to seem like a single switch to the enterprise network, because it is owned by a separate administrative group. Which Spanning Tree Protocol should be used to support the design requirements? 

A. IEEE 802.1w 

B. IEEE 802.1D 

C. IEEE 802.1s 

D. IEEE 802.1p 

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Q2. A Mobile Service Provider would like to design and deploy an Ethernet service which has similar physical link failover/failback characteristics on the active/backup links as the APS/MSP SONET properties. Which Layer 2 services should be considered to address this design feature? 

A. Port-Channel 

B. MLPPP 

C. Flex Link 

D. Ethernet Pseudowires 

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Q3. You are asked to design a large campus network that will be using multicast for data transport. Which feature should be enabled at the Layer 2 access edge for host-only ports? 

A. PortFast 

B. BPDU guard 

C. PIM-SM 

D. PIM query interval 

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Q4. Which technique can you use to detect forwarding path failures at a uniform rate, and reconvergence times will be consistent and predictable when your routers are in the same broadcast domain? 

A. Enable BFD on your routers. 

B. Configure your routers with IP-SLA to ping the peer router. 

C. Configure your routers with IP-SLA and track to ping the peer and switch to a default route if the pings fail. 

D. Tune your routing protocol timers. 

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Q5. Currently a service provider provides IPv4 traceroute services between MPLS PE routers. The provider wants to implement IPv6 with MPLS 6PE/6VPE and then provide parallel IPv6 traceroute services between MPLS PE routers. Which two design solutions provide this service? (Choose two.) 

A. The P routers must support ICMPv6. 

B. The PE routers must support ICMPv6. 

C. The P routers must support full IPv6. 

D. The PE routers must support full IPv6. 

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Q6. Your company will attach to a new Gigabit Ethernet-based wide area network from the local service provider for remote connectivity. Each connection will have a 150 Mb/s committed information rate. For the design of this new service, which QoS mechanism should be used to ensure low packet loss toward the service provider network? 

A. shaping 

B. policing 

C. CBWFQ 

D. RED 

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Q7. Refer to the exhibit. 

A new IPv4 multicast-based video-streaming service is being provisioned. During the design-validation tests, you realize that the link between the two buildings is carrying multicast traffic even when there are no receivers connected to the switch in Building B and despite IGMP snooping being enabled on both Layer 2 switches and IGMPv2 runs on the hosts. Which design change will prevent the multicast traffic from being unnecessarily flooded throughout the campus network? 

A. Enable PIM snooping on both Layer 2 switches. 

B. Enable multicast storm control on the link between Switch 1 and Switch 2. 

C. Use static Layer 2 MAC forwarding entries on Switch 1. 

D. Change the IPv4 multicast group address such that it excludes the usage of link-local MAC addresses. 

E. Ensure that Switch 1 is an IGMP querier. 

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Q8. Refer to the exhibit. 

How would you redesign the network to improve availability of the routers 1A and 1B at the core site? 

A. Enable Graceful Restart Helper for OSPF 

B. Use link bundles over multiple slots 

C. Use APS Ethernet circuits and redundant interfaces 

D. Create a multichassis system with the two routers 

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Q9. Refer to the exhibit. 

How would you adjust the design to improve convergence on the network? 

A. Add an intra-POP link between routers 1A and 1B, and enable IP LFA FRR. 

B. Use an IP SLA between the end stations to detect path failures. 

C. Enable SSO-NSF on routers 1A and 1B. 

D. Use BGP to connect the sites over the WAN. 

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Q10. 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. 

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