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Q131. 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. 


Q132. A network designer wants to improve a company network design due to multiple network crashes. Which technology would allow for the restore of a network connection without informing the Layer 3 protocol? 

A. Bidirectional Forwarding Detection 

B. automatic protection switching 

C. UniDirectional Link Detection 

D. Ethernet OAM 


Q133. 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 

Q134. Which two techniques are used in a network design to slow down the distribution of topology information caused by a rapidly flapping link? (Choose two.) 

A. Bidirectional Forwarding Detection 

B. IP event dampening 

C. link-state incremental SPF 

D. link-state partial SPF 

E. LSA throttling 

F. SPF throttling 

Answer: BE 

Q135. You have been hired by a startup company to provide optical services using MPLS-TP. Which three options describe reasons to use the MPLS-TP standard in your design? (Choose three.) 

A. MPLS-TP is a newer packet transport technology that replaces SONET/SDH. 

B. MPLS-TP includes extensions to native MPLS OAM for fault detection, monitoring, and propagation. 

C. MPLS-TP requires a routing protocol. 

D. MPLS-TP uses an IANA assigned label 13 for OAM. 

E. MPLS-TP uses Ethernet Y.1731 OAM. 

Answer: ABD 

Q136. As part of the security protocol for your network design, you have designated that option 82 is enabled for DHCP snooping. When option 82 is enabled, which information will be added to the DHCP request? 

A. switch MAC address and VLAN, module, and port 

B. remote ID and circuit ID 

C. switch IP address and VLAN, module, and port 

D. switch MAC address and switch IP address 


Q137. 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 

Q138. 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 


Q139. 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 

Q140. Which mechanism provides a Layer 2 fault isolation between data centers? 



C. advanced VPLS 


E. fabric path