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Q71. The Service Provider you work for wants to deploy CoS functionality on the P routers of the MPLS core, to provide a complete CoS solution to all customers that purchase services such as dedicated Internet access, MPLS Layer 3 VPN, and Layer 2 VPN (pseudowire). The design requirements are: 

. The network supports four service queues with equal treatment for delay, jitter, 

and packet loss. 

. Queues are numbered 0–3, where 0 is the default queue. 

. Three queues have one treatment, whereas the other queue has either one or two 

treatments. 

. The Service Provider manages control traffic, whereas the customers manage 

business critical and best effort. 

Which two statements could you recommend to allow for the appropriate level of bandwidth allocation? (Choose two.) 

A. Control plane 10%, Real Time 30%, Business Critical 40%, Best Effort 20% 

B. Control plane 80%. Real Time 10%, Business Critical 5%, Best Effort 5% 

C. Control plane 90%, Real Time 5%, Business Critical 5%, Best Effort 0% 

D. Control plane 20%, Real Time 40%, Business Critical 30%, Best Effort 10% 

Answer: AD 


Q72. A customer is using a service provider to provide a WAN backbone for a 30-site network. In establishing the network, the customer must work within these constraints: 

The customer has a self-managed MPLS backbone. 

The VPLS WAN backbone of the service provider does not support PIM snooping. 

Multicast VPN must be used for multicast support inside some VRFs. 

What can the customer do so that multicast traffic is NOT flooded to all sites? 

A. Configure static GRE tunnels and run the MPLS and multicast VPN inside these GRE tunnels. 

B. Use Label Switched Multicast for the multicast transport. 

C. Use PIM-SSM as the multicast routing protocol with IETF Rosen Draft multicast VPN. 

D. Configure a static mapping between multicast addresses and MAC addresses. 

E. Use GET VPN to encrypt the multicast packets inside the WAN. 

Answer: A 


Q73. As a service provider you must support a Layer 2 virtualization protocol that does not include the use of label switching. Which option can meet this design requirement? 

A. VPLS 

B. VRF-Lite 

C. QinQ 

D. 802.3ad 

Answer: C 


Q74. Which two factors can significantly affect the OSPF network convergence time? (Choose two.) 

A. the tuning of OSPF LSA timers 

B. the number of OSPF routes 

C. the diameter of the OSPF network 

D. different processor capabilities of devices 

Answer: AD 


Q75. Refer to the exhibit. 

When designing an MPLS-based LAN extension between DC-1 and DC-2, what are three advantages of deploying VSS? (Choose three.) 

A. Layers 2, 3, and 4 flow-based load balancing 

B. native VSS and MEC failover without using scripts 

C. sub-second failover 

D. required to configure VPLS 

E. failover time depends on Cisco IOS EEM and STP convergence 

F. limited VLAN-based VPLS traffic hashing 

Answer: A,B,C 


Q76. A many-to-many enterprise messaging application is using multicast as a transport mechanism. As part of the network design for this application, which multicast address should be used, according to best practices outlined in RFC 2365? 

A. 224.0.0.60 

B. 232.192.0.60 

C. 239.128.0.60 

D. 239.193.0.60 

Answer: D 


Q77. 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 


Q78. Voice traffic between two campus enterprise networks is growing. The network designers decide to add a second 10-Mb Metro Ethernet service parallel to their original 10-Mb service in order to provide more bandwidth and diversity. The QoS profile will be the same on the new 10-Mb service due to the voice stability on the first Metro Ethernet link. When the second link is added to the OSPF domain, which traffic design consideration would have the most impact on the voice traffic when both links are active? 

A. per-destination IP address basis 

B. per-flow basis 

C. per-packet basis 

D. per-source IP address basis 

Answer: C 


Q79. 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 


Q80. You are redesigning an OSPF v2 network and must migrate some links. You are concerned that there are different subnet masks. Which two link types will still form an OSPF adjacency even if there are subnet mask mismatches? (Choose two.) 

A. virtual 

B. broadcast 

C. point-to-multipoint 

D. non-broadcast 

E. point-to-point 

Answer: AE