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Q11. What are two benefits of using BFD for failure detection in the design of a network?
(Choose two.)
A. BFD can provide failure detection in less than one second.
B. BFD can be used as a generic and consistent failure detection mechanism for EIGRP, IS-IS, and OSPF.
C. BFD eliminates router protocol hello notification.
D. BFD can be used for all types of network interfaces.
E. BFD is independent of the network protocol.
Answer: AB
Q12. During a network design review, it is recommended that the network with a single large area should be broken up into a backbone and multiple nonbackbone areas. There are differing opinions on how many ABRs are needed for each area for redundancy. What would be the impact of having additional ABRs per area?
A. There is no impact to increasing the number of ABRs.
B. The SPF calculations are more complex.
C. The number of externals and network summaries are increased.
D. The size of the FIB is increased.
Answer: C
Q13. 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
Q14. In which two ways is IPv4 and IPv6 traffic handled in a network design that uses QoS deployment options? (Choose two.)
A. IPv6 and IPv4 traffic is treated in the same way by using a single QoS policy that classifies and matches on both protocols.
B. IPv6 traffic is treated differently than IPv4 by using the flow-label field, which is built into the IPv6 packet header.
C. IPv6 traffic does not require QoS because it uses to the flow-label field, which classifies and matches on the IPv6 protocol.
D. IPv6 traffic is treated differently than IPv4 by using two different QoS policies.
E. IPv6 traffic is treated differently than IPv4 because it uses only the DSCP value and not the IP precedence.
Answer: AD
Q15. You are designing a network to support data, voice and video. Which two main factors will you address to improve network convergence? (Choose two.)
A. event propagation delay
B. failure detection delay
C. forwarding engine update delay
D. routing table recalculation delay
Answer: BD
Q16. 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
Q17. Refer to the exhibit.
The design is being proposed for use within the network. The CE devices are OSPF graceful restart-capable, and the core devices are OSPF graceful restart-aware. The WAN advertisements received from BGP are redistributed into OSPF. A forwarding supervisor failure event takes place on CE A. During this event, how will the routes learned from the WAN be seen on the core devices?
A. via CE A and CE B
B. via CE A
C. via CE B
D. no WAN routes will be accessible
Answer: C
Q18. 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
Q19. You are designing a large-scale DMVPN network with more than 500 spokes using EIGRP as the IGP protocol. Which design option eliminates potential tunnel down events on the spoke routers due to the holding time expiration?
A. Increase the hold queue on the tunnel interface of the spoke routers.
B. Increase the hold queue on the physical interface of the spoke routers.
C. Increase the hold queue on the physical interface of the hub router.
D. Increase the hold queue on the tunnel interface of the hub router.
E. Apply QoS for pak_priority class.
Answer: D
Q20. You are designing a traffic monitoring and analysis system for a customer. Which traffic monitoring technique would you recommend to place the least amount of burden on the network infrastructure?
A. SPAN monitor ports
B. NetFlow
C. IP NBAR
D. passive taps
Answer: D