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Cisco 400-007 Exam Syllabus Topics:

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

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Cisco Certified Design Expert (CCDE) Written Exam Sample Questions (Q389-Q394):

NEW QUESTION # 389
Drag and drop the design use cases from the left onto the correct uRPF techniques used to prevent spoofing attacks Not all options are used.

Answer:

Explanation:

NEW QUESTION # 390
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. Metro Ethernet
B. CWDM over dark fiber
C. MPLS
D. DWDM over dark fiber

Answer: A

NEW QUESTION # 391
Which two features are advantages of SD-WAN compared to MPLS-based connectivity? (Choose two.)

A. uses FEC constructs for traffic forwarding, thereby improving efficiency
B. uses policy-based forwarding of real-time traffic with less complexity
C. unifies the WAN backbone
D. manages failures through backup links
E. separates infrastructure and policy

Answer: B,C

NEW QUESTION # 392
You have been asked to design a high-density wireless network for a university campus. Which two principles would you apply in order to maximize the wireless network capacity? (Choose two.)

A. Implement a four-channel design on 2.4 GHz to increase the number of available channels
B. Enable 802.11n channel bonding on both 2.4 GHz and 5 GHz to increase the maximum aggregated cell throughput.
C. Choose a high minimum data rate to reduce the duty cycle.
D. Make use of the 5-GHz band to reduce the spectrum utilization on 2.4 GHz when dual-band clients are used.
E. Increases the number of SSIDs to load-balance the client traffic.

Answer: C,D

Explanation:
* B: Setting a higher minimum data rate reduces airtime consumption from low-speed clients, improving overall capacity.
* D: Utilizing 5 GHz reduces contention on the heavily congested 2.4 GHz band, allowing better spectral efficiency in high-density environments.
Why other options are incorrect:
* A: 2.4 GHz only supports 3 non-overlapping channels; 4-channel design introduces interference.
* C: Excessive SSIDs increase management overhead and beacon traffic.
* E: Channel bonding in 2.4 GHz is discouraged in high-density deployments due to channel overlap and interference.
-

NEW QUESTION # 393
Which two factors must be considered while calculating the Recovery Time Objective (RTO)? (Choose two)

A. Maximum tolerable amount of data loss that the organization can sustain
B. How often backups are taken and how quickly these can be restored
C. Importance and priority of individual systems
D. Steps needed to mitigate or recover from a disaster
E. Cost of lost data and operations

Answer: C,E

Explanation:
# Explanation:
* A: RTO depends on how critical the system is. More critical systems require shorter recovery times.
* C: The business impact of downtime (cost of operational loss) drives the acceptable RTO for systems.
Incorrect options:
* B: This refers to Recovery Point Objective (RPO), not RTO.
* D: Backup frequency aligns with RPO; restore speed can influence RTO but isn't a direct calculation input.
* E: Mitigation steps are part of disaster recovery planning-not direct RTO calculation.

NEW QUESTION # 394
......

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