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Q41. A large enterprise customer is migrating thousands of retail offices from legacy TDM circuits to an Ethernet-based service. The network is running OSPF and has been stable for many years. It is now possible to backhaul the circuits directly to the data centers, bypassing the regional aggregation routers. Which two networking issues need to be addressed to ensure stability with the new design? (Choose two.)
A. Nothing will change if the number of offices is the same.
B. Nothing will change if the number of physical interfaces stays the same.
C. The RIB will increase significantly.
D. The FIB will increase significantly.
E. The amount of LSA flooding will increase significantly.
F. The size of the link-state database will increase significantly.
Answer: EF
Q42. A metro service provider is planning Resilient Ethernet Protocol for his backbone. Which two aspects must be considered before the network design is finalized? (Choose two.)
A. Two Resilient Ethernet Protocol segments can be connected redundantly at two points. One connection will be blocked, using the Spanning Tree Protocol defined in IEEE 802.1D.
B. UniDirectional Link Detection Protocol can be enabled on Resilient Ethernet Protocol interfaces to detect unidirectional failures.
C. The guaranteed convergence recovery time is less than 50 ms for the local segment.
D. A Resilient Ethernet Protocol segment is limited to a maximum of seven devices.
E. VLAN load balancing for optimal bandwidth usage is supported in any Resilient Ethernet Protocol segment.
Answer: BE
Q43. You are performing a BGP design review for a service provider that offers MPLS-based services to their end customers. The network is comprised of several PE routers that run iBGP with a pair of route reflectors for all BGP address families. Which two options about the use of Constrained Route Distribution for BGP/MPLS VPNs are true? (Choose two.)
A. This feature must be enabled on all devices in the network at the same time.
B. The RR must advertise the default route target filter toward the PE routers.
C. The RRs do not need to advertise any route target filter toward the PE routers.
D. Both PE and RR routers must support this feature.
Answer: BD
Q44. You are tasked to design a QoS policy for a service provider so they can include it in the design of their MPLS core network. If the design must support an MPLS network with six classes, and CEs will be managed by the service provider, which QoS policy should be recommended?
A. map DSCP bits into the Exp field
B. map IP precedence bits into the DSCP field
C. map flow-label bits into the Exp field
D. map IP CoS bits into the IP Precedence field
E. map IP ToS bits into the Exp field
Answer: A
Q45. You have been tasked with designing a data center interconnect to provide business continuity. You want to encrypt the traffic over the DCI using IEEE 802.1AE MACsec to prevent the deployment of any firewall or IPS. Which two interconnect technologies support MACsec? (Choose two.)
A. EoMPLS
B. MPLS Layer 3 VPN
C. DMVPN
D. OTV
E. VPLS
F. GET VPN
Answer: AE
Q46. A large service provider offers VoIP and Video services to business customers. Which three areas should the service provider monitor related to these services? (Choose three.)
A. bandwidth utilization
B. service response time
C. packet loss
D. jitter
E. latency
F. availability
Answer: CDE
Q47. Which two features can be used to extend VRFs across a campus? (Choose two.)
A. 802.1q trunks
B. LDP
C. MPLS TE
D. GRE
E. port channels
Answer: AD
Q48. Refer to the exhibit.
How would you redesign the network to improve availability of the routers 1A and 1B at the core site?
A. Enable Graceful Restart Helper for OSPF
B. Use link bundles over multiple slots
C. Use APS Ethernet circuits and redundant interfaces
D. Create a multichassis system with the two routers
Answer: D
Q49. In an MPLS-VPN environment, what is the effect of configuring an identical set of route targets for a particular VRF, but then configuring nonidentical route distinguisher across multiple PE devices?
A. The routes will be correctly handled by the control plane, but there will be instances where routes take up twice as much memory.
B. The routes will propagate to the remote PE, but the PE will never install them in its forwarding table.
C. The routes will be rejected by the remote PE because they have a different RD than its routes.
D. The routes will not even be sent to any remote PE with a different RD.
Answer: A
Q50. How should multiple OSPF areas be designed when deployed on a classic three-layer (core/distribution/access) network hierarchy?
A. The OSPF flooding domain boundary should be at the edge of the core layer.
B. The OSPF flooding domain boundary should be within the distribution layer.
C. OSPF should generally be deployed in a three-layer domain hierarchy to align with the physical three-layer hierarchy.
D. OSPF flooding domain boundaries should be placed with route aggregation in mind.
Answer: D