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Cisco 400-007 Exam Syllabus Topics:

Section	Objectives
Topic 1: Multicast and Advanced Services	- Network services 1. QoS design principles 2. Security integration in design - Multicast design 1. Multicast distribution models 2. PIM architecture and scaling
Topic 2: MPLS and VPN Architectures	- VPN design 1. L3VPN and L2VPN design models 2. Multi-site connectivity strategies - MPLS fundamentals 1. Label switching architecture 2. MPLS scalability design
Topic 3: Infrastructure Design (Layer 2 / Layer 3)	- Layer 3 design 1. IGP selection and design 2. IP addressing and summarization - Layer 2 technologies 1. Spanning Tree design considerations 2. Ethernet scaling and segmentation
Topic 4: Routing and Path Control	- Traffic engineering 1. Path optimization techniques 2. Policy-based routing considerations - Routing protocol design 1. OSPF / IS-IS architecture 2. BGP policy and scalability
Topic 5: End-to-End Enterprise Architecture Scenarios	- Service integration 1. Hybrid connectivity design 2. Migration and transformation strategies - Large-scale enterprise design 1. High availability and redundancy 2. Scalability and resiliency trade-offs
Topic 6: Network Design Methodology and Principles	- Design lifecycle and methodology 1. Design phases and validation approaches 2. Trade-off analysis techniques - Requirements gathering and analysis 1. Stakeholder requirements mapping 2. Business and technical constraints

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Cisco Certified Design Expert (CCDE) Written Exam Sample Questions (Q217-Q222):

NEW QUESTION # 217
As more links are added to a network, the control plane slows down due to more data to process. As redundancy increases, MTTR also increases. Which risk increases along with the higher MTTR?

A. Overlapping outages
B. Management visibility
C. Slower data plane convergence
D. Topology change detection

Answer: A

Explanation:
# Explanation:
C: As MTTR (Mean Time to Repair) increases due to complex topologies and control plane delays, the likelihood of experiencing overlapping outages (i.e., a second failure occurring before the first is resolved) also increases. This can cascade into a wider outage.
Other options:
A: Management visibility isn't directly affected by MTTR.
B: Data plane convergence is generally fast and not as affected as control plane convergence.
D: Topology changes may still be detected quickly, but the reaction time (recovery) is delayed.
#

NEW QUESTION # 218
A multicast network is sing Bidirectional PIM. Which two combined actions achieve high availability so that two RPs within the same network can act in a redundant manner? (Choose two)

A. Advertise the two RP addresses in the routing protocol
B. Use anycast RP based on MSDP peering between the two RPs
C. Manipulate the administration distance of the unicast routes to the two RPs
D. Control routing to the two RPs through a longest match prefix
E. Use two phantom RP addresses
F. Manipulate the multicast routing table by creating static mroutes to the two RPs

Answer: D,E

Explanation:
https://community.cisco.com/t5/networking-knowledge-base/rp-redundancy-with-pim-bidir-phantom-rp/ta-p/3117191

NEW QUESTION # 219
Software-defined networking architecture is used for cost-effective, adaptable and easily manageable applications. In which two software-defined networks is SDN commonly used?
(Choose two.)

A. metro network
B. application network
C. wide area network
D. control network
E. mobile network

Answer: C,E

NEW QUESTION # 220
A network engineering team is in the process of designing a lab network for a customer demonstration. The design engineer wants to show that the resiliency of the MPLS Traffic Engineering Fast Reroute solution has the same failover/failback times as a traditional SONET/SDH network (around 50 msec). In order to address both link failure and node failure within the lab topology network, which type of the MPLS TE tunnels must be considered for this demonstration?

A. Next-hop (NHop) tunnel
B. FRR Backup tunnel
C. Next-next-hop (NNHop) tunnel
D. TE backup tunnel

Answer: C

Explanation:
To achieve sub-50ms protection against both link and node failures, MPLS TE Fast Reroute (FRR) with Next- Next-Hop (NNHop) protection is used:
Next-Next-Hop tunnels provide node protection by pre-establishing a detour that bypasses not only the immediate next-hop link but also the entire next node.
This ensures protection for both link and node failures, matching SONET/SDH resiliency targets.
Other options explained:
A and C: TE backup and FRR backup tunnels may only provide link protection depending on deployment.
B: Next-Hop tunnels address only link failures, not node failures.

NEW QUESTION # 221
Refer to the table.

A customer investigates connectivity options for a DCI between two production data centers to aid a large- scale migration project. The migration is estimated to take 20 months to complete but might extend an additional 10 months if issues arise. All connectivity options meet the requirements to migrate workloads.
Which transport technology provides the best ROI based on cost and flexibility?

A. CWDM over dark fiber
B. MPLS
C. DWDM over dark fiber
D. Metro Ethernet

Answer: D

Explanation:
Let's calculate the total cost for each solution based on the most likely maximum duration (20 + 10 = 30 months) to ensure conservative, flexible planning.
-
DWDM over dark fiber:
CAPEX = $200,000
OPEX (annual): $100,000 # for 30 months = (2.5 × $100,000) = $250,000
Installation fee = $30,000
Total = $200,000 + $250,000 + $30,000 = $480,000
CWDM over dark fiber:
CAPEX = $150,000
OPEX (annual): $100,000 # for 30 months = (2.5 × $100,000) = $250,000
Installation fee = $25,000
Total = $150,000 + $250,000 + $25,000 = $425,000
MPLS wires only:
CAPEX = $50,000
OPEX (annual): $180,000 # for 30 months = (2.5 × $180,000) = $450,000
Installation fee = $5,000
Total = $50,000 + $450,000 + $5,000 = $505,000
Metro Ethernet:
CAPEX = $65,000
OPEX (annual): $100,000 # for 30 months = (2.5 × $100,000) = $250,000
Installation fee = $5,000
Total = $65,000 + $250,000 + $5,000 = $320,000
-
Analysis:
Metro Ethernet has the lowest overall cost at $320,000 and provides sufficient flexibility for workload migration since " all connectivity options meet technical requirements. " Metro Ethernet is typically more flexible than DWDM/CWDM for temporary or dynamic migration projects because it does not require optical expertise or complex dark fiber management.
MPLS is more expensive here and less flexible for large-scale Layer 2 migrations.
CWDM/DWDM are suitable for permanent solutions where long-term investment is justified, but not optimal here due to cost.
Therefore, best ROI and flexibility: Metro Ethernet
Final correct answer: D

NEW QUESTION # 222
......

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