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Q1. There is an MPLS-enabled link constantly flapping on an MPLS VPN network. Given that the network runs OSPF as the IGP protocol, which design mechanism will stabilize the network and avoid constant reconvergences? 

A. BFD 

B. IP Event Dampening 

C. OSPF fast hellos 

D. partial SPF 

Answer: B 

Q2. To meet specific business requirements, QoS-marked traffic must be sent over a dedicated link. Which technology fulfills this requirement? 

A. MPLS 

B. Q-in-Q tunneling 

C. policy-based routing 

D. EIGRP with modified metrics 

Answer: C 

Q3. You are identifying performance management requirements for a VoIP migration. What three key performance indicators would you use to track media quality? (Choose three.) 

A. delay 

B. trunk group usage 

C. jitter 

D. packet loss 

E. call processing (call detail records) 

F. call processing (performance counters) 

G. echo 

H. crosstalk 

Answer: ACD 

Q4. A network designer has provisioned a router to use IPsec to encrypt the traffic over a GRE tunnel going to a web server at a remote location. From the router, the network designer can ping the web server, although the users in the office comment that they are unable to reach it. (Note: The DF bit is not set.) Which aspect should be changed in the design of the virtual connection? 

A. IP addresses of the GRE tunnel endpoints 

B. IPsec configuration 

C. MTU size on the GRE tunnel 

D. encapsulation of the GRE tunnel 

Answer: C 

Q5. 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. 

Answer: BE 

Q6. 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. 

Answer: D 

Q7. A customer wants to understand the benefits of a proposed network design that utilizes SNMPv3. Which two network threats is SNMPv3 effective against? (Choose two.) 

A. modification of information threats 

B. masquerade threats 

C. denial of service threats 

D. traffic analysis threats 

Answer: AB 

Q8. Which three techniques can be used to improve fault isolation in an enterprise network design? (Choose three.) 

A. aggregate routing information on an OSPF ABR 

B. fully meshed distribution layer 

C. Equal-Cost Multipath routing 

D. EIGRP query boundaries 

E. multiple IS-IS flooding domains 

F. tuned Spanning Tree Protocol timers 

Answer: ADE 

Q9. You are creating a network design that will influence the traffic path across the MPLS core on a virtual private LAN. Which parameter is included in your design to manage the traffic? 

A. Deploy MPLS traffic engineering and modify the path using the preferred path. 

B. Deploy MPLS traffic engineering and modify the path using auto-route, static routing, or PBR. 

C. Create an MPLS traffic engineering tunnel and modify the path using a static route. 

D. Create an MPLS traffic engineering tunnel and modify the path using auto-route announce. 

Answer: A 

Q10. A Tier-3 Service Provider is evolving into a Tier-2 Service Provider due to the amount of Enterprise business it is receiving. The network engineers are re-evaluating their IP/MPLS design considerations in order to support duplicate/overlapping IP addressing from their Enterprise customers within each Layer 3 VPN. Which of the following would need to be reviewed to ensure stability in their network? 

A. Assigning unique Route Target ID's 

B. Assigning unique Route Distinguishers 

C. Assigning unique IP address space for the Enterprise NAT/Firewalls 

D. Assigning unique VRF ID's to each Layer 3 VPN 

Answer: B