Approved CCIE Service Provider 400-201 vce

Q1. QoS is applied on an outgoing interface as shown below: 

What will the QoS result be for egress traffic with an average queue depth of 40 that is marked as DSCP AF32? 

A. Traffic will be dropped with a random rate less than the one defined by MPD. 

B. All traffic will be tail dropped. 

C. Traffic will be dropped with a rate of 1 packet out of 20. 

D. Traffic will be dropped with a rate of 1 packet out of 30. 

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Q2. The following congestion avoidance configuration has been applied on an outgoing interface: 

Which is the result of the egress packets marked as DSCP AF32 when the average queue depth is 40? 

A. It will be dropped with a random rate less than the one defined by MPD. 

B. It will be tail dropped. 

C. It will be dropped with a rate of 1 packet out of 30. 

D. It will be dropped with a rate of 1 packet out of 20. 

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Q3. Refer to the exhibit. Router RT1 has three equal-cost paths back to the source. Which configuration should be applied in order to load-balance the multicast traffic across all three links. 

A. Create three static multicast routes where each pointing out to one or three interfaces. 

B. Enable PIM multipath. 

C. Create a tunnel interface between RT1 and RT2. Enable PIM on the interface tunnel and disable PIM on the three interfaces part of equal-cost path between RT1 and RT2. 

D. PIM load balance is not possible. PIM only chooses one interface for RFC check and prunes the other interfaces. 

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Q4. An operations engineer wants to manually optimize the MPLS Traffic Engineering tunnels. Which Cisco IOS EXEC command should the engineer apply? 

A. tunnel mpls traffic-eng autoroute destination 

B. tunnel mpls traffic-eng path-option lowest _number dynamic 

C. mpls traffic-eng reoptimize lockdown 

D. mpls traffic-eng multicast-intact 

E. mpls traffic-eng reoptimize 

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Q5. Which are the two fundamental ways in which IEEE 1588 differs from SyncE? (Choose two.) 

A. In addition to frequency synchronization, it achieves ToD synchronization to achieve phase alignment which is required for multi-channel communication. 

B. It is a purely-based solution, with the actual clock values being passed inside the payloads of special packets dedicated to that task. 

C. It offers two major changes over traditional Ethernet to make it suitable for clock distribution: a mandated clock accuracy and the ESMC protocol for clock selection, distribution, management, traceability, and failover. 

D. SyncE is a Cisco proprietary ToD technology where IEEE 1588 is a industry standard recommended for interoperability across vendor devices. 

E. IEEE 1588 applies to voice-only systems or with low-bandwidth data traffic. 

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Q6. Customers connecting to a Service Provider for Internet access are intending to implement redundant peering. The design requirements call for preferring a primary link for both ingress and egress traffic. Secondary links should be used only during primary outages. What two BGP deployment options will accomplish this design goal? (Choose two.) 

A. On the router handling the secondary link, advertise routes with a MED value of 0. 

B. On the router handling the primary link, set the weight for all incoming routes to be a value of 0. 

C. On the router handling the secondary link, advertise all routes with a longer AS-PATH value. 

D. On the router handling the primary link, advertise all routes with a longer AS-PATH value. 

E. On the router handling the secondary link, set the local preference for all incoming routes to be a value of 0. 

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Q7. Which network interface technology eliminates the need for an external transponder at service provider sites? 

A. IPoDWDM 

B. CWDM 

C. SONET 

D. SDH 

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Q8. The product team at an ISP that offers VoIP services wants to add two-way video conferencing to their product offering. Which three QoS methods can be applied for real-time traffic on WAN links with speeds that are slower than 768 Kbps? (Choose three.) 

A. Apply voice-adaptive fragmentation to ensure that large video packets are fragmented and interleaved. 

B. Apply LLQ with video traffic that is dedicated in the priority queue. 

C. Apply MLP link fragmentation and interleaving to the interface. 

D. Apply CBWFQ with video traffic in its own class, which is marked with a PHB value of AF41. 

E. Apply CBWFQ with VoIP traffic in its own class, which is marked with a PHB value of EF. 

F. Apply LLQ with both voice traffic and video traffic in the same priority queue 

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Q9. In which three ways do PE routers manage multiple customers in MPLS VRF environments? (Choose three.) 

A. Route targets are configured that allow the PE to uniquely identify the customer routes in MP-BGP 

B. PE routers use route distinguishers to tag routes for importing and exporting into customer VRFs. 

C. PE routers use PE-CE routing protocols to manage routing with client VRF devices. 

D. PE routers use route targets to tag routes for importing and exporting into customer VRFs. 

E. Route distinguishes are configured that allow the PE to uniquely identify the customer routes in MP-BGP. 

F. PE routers use PE-PE routing protocols to manage routing with client VRF devices. 

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Q10. What BGP feature improves on DDOS mitigation by allowing instructions that are more granular and allow for source address, destination, address, L4 details, and packet specifics to be analyzed? 

A. RCMD 

B. RTBH 

C. BGP Flowspec 

D. BGPSec 

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