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Q1. Which three factors slow down network convergence? (Choose three.)
A. constant interface flapping
B. lack of redundant paths
C. inconsistent topology states between routers
D. transport network failing to generate LoS
E. wrong summarization in ABRs
Answer: ACD
Q2. You are designing a network that will run EIGRP over a Metro Ethernet service that does not employ a link-loss technology. What will be the impact on convergence if there is a break in the end-to-end Layer 2 connectivity within the service provider network?
A. The routers will immediately lose their adjacencies and converge.
B. The routing protocol will not converge until the hold timers have expired.
C. The switch ports connected to the router will go down and the routers will immediately converge.
D. The VLAN on the switches will go inactive, the ports associated on the switch will go down, and the routers will immediately converge.
Answer: B
Q3. Which mechanism should be added to a network design to identify unidirectional Spanning Tree Protocol failures through BPDU loss?
A. UDLD
B. loop guard
C. BPDU guard?
D. root guard
Answer: B
Q4. Which two options are two advantages of summarizing networks at the aggregation layer rather than at the core? (Choose two.)
A. It prevents the core from having unnecessary routes.
B. It no longer needs a core layer.
C. It prevents black hole routing.
D. It avoids network-wide impact upon VLAN changes local to the aggregation devices.
Answer: AD
Q5. A network design includes a long signaling delay in notifying the Layer 3 control plane that an interface has failed. Which two of these actions would reduce that delay? (Choose two.)
A. Enable lower data link layer recovery systems to have an opportunity to restore the interface.
B. Increase the notification of interface flaps.
C. Reduce the time for the network to reconverge.
D. Increase network stability.
Answer: AD
Q6. A network designer is working with a company to improve convergence at the Layer 2 control plane and decides to use LACP. Which of these components does LACP use to create the system ID?
A. LACP system priority and switch MAC address
B. LACP port priority and switch MAC address
C. LACP port priority and port number
D. LACP system priority and port number
Answer: A
Q7. Refer to the exhibit.
In this network design, where should summarization occur to provide the best summarization and optimal paths during a single-failure incident as well as during normal operation?
A. a single identical summary for all the branch offices placed on routers 1A, 1B, 2A, and 2B
B. two summaries on 1A and 1B, and two summaries on 2A and 2B
C. a single identical summary on 3A and 3B
D. a single summary on each aggregation device for the branches connected to them
Answer: C
Q8. A multicast network is using bidirectional PIM. Which two actions, when combined, can achieve high availability so that two RPs within the same network can act in a redundant manner? (Choose two.)
A. Use Anycast RP based on MSDP peering between the two RPs.
B. Use a phantom RP address.
C. Advertise routes for the two RPs with the same subnet mask through the unicast routing protocol.
D. Advertise routes for the two RPs with different subnet mask lengths through the unicast routing protocol.
E. Manipulate the administrative distance of the unicast routes to the two RPs.
F. Manipulate the multicast routing table by creating static mroutes to the two RPs.
Answer: BD
Q9. A green data center is being deployed and a design requirement is to be able to readily scale server virtualization. Which IETF standard technology can provide this requirement?
A. Transparent Interconnection of Lots of Links
B. fabric path
C. data center bridging
D. unified fabric
Answer: A
Q10. You are a network designer and have been asked to consult with your server operations team to further enhance the security of the network. The operations team provides you with these details about the network:
A pool of servers is accessed by numerous data centers and remote sites.
The servers are accessed via a cluster of firewalls.
The firewalls are configured properly and are not dropping traffic.
The firewalls occasionally cause asymmetric routing of traffic within the server data center.
Which technology would you recommend to enhance security by limiting traffic that could originate from a hacker compromising a workstation and redirecting flows at the servers?
A. Access control lists to limit sources of traffic that exits the server-facing interface of the firewall cluster
B. Poison certain subnets by adding static routes to Null0 on the server farm core switches.
C. Unicast Reverse Path Forwarding in strict mode
D. Unicast Reverse Path Forwarding in loose mode
Answer: D