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Cisco 400-007 exam is intended for senior network designers and architects who have extensive experience in designing complex network solutions. 400-007 exam is also suitable for individuals who aspire to become network designers and want to demonstrate their expertise in this field. Candidates who pass the Cisco 400-007 Exam are eligible to take the CCDE practical exam, which evaluates their ability to design and implement network solutions in a real-world environment.

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Cisco 400-007 exam covers a wide range of topics related to network design, including design methodologies, network infrastructure, routing and switching protocols, security, and network management. 400-007 Exam consists of multiple-choice and scenario-based questions, and candidates are required to demonstrate their ability to analyze and solve complex network design problems.

Cisco Certified Design Expert (CCDE) Written Exam Sample Questions (Q373-Q378):

NEW QUESTION # 373
The SD-WAN architecture is composed of separate orchestration, management, control, and data planes.
Which activity happens at the orchestration plane?

Answer: D

Explanation:
The SD-WAN architecture separates roles by function:
* Orchestration Plane: Handles device lifecycle functions such as zero-touch provisioning (ZTP) and certificate distribution. It facilitates onboarding into the overlay securely and automatically.
* Control Plane: Makes forwarding decisions and shares route and policy information.
* Data Plane: Forwards packets.
* Management Plane: Provides visibility, analytics, and template-based policy configuration.
Option A correctly identifies orchestration as the ZTP and bootstrapping component.


NEW QUESTION # 374
Which two features are advantages of SD-WAN compared to MPLS-based connectivity? (Choose two.)

Answer: B,E

Explanation:
* B (Separation of infrastructure and policy):SD-WAN decouples policy control from the underlying transport.
* C (Simpler policy-based forwarding):Centralized controllers dynamically steer traffic according to application policies with less complexity than traditional QoS in MPLS.
Other options explained:
* A: FEC (Forward Error Correction) is typically not used in standard SD-WAN implementations.
* D: SD-WAN does not unify WAN backbones; it abstracts multiple underlays.
* E: Both MPLS and SD-WAN have failure management, but SD-WAN focuses more on dynamic path control than simply backup links.


NEW QUESTION # 375
Which architecture does not require an explicit multicast signaling protocol, such as PIM or P2MP, to signal the multicast state hop-by-hop, but instead uses a link state protocol to advertise the multicast forwarding state?

Answer: A


NEW QUESTION # 376
Refer to the exhibit.

The enterprise customer wants to stream one-way video from their head office to eight branch offices using multicast. Their current service provider provides a Layer3 VPN solution and manages the CE routers, but they do not currently support multicast. Which solution quickly allows this multicast traffic to go through while allowing for future scalability?

Answer: A


NEW QUESTION # 377
Which two design solutions ensure sub-50 msec of the convergence time after a link failure in the network?
(Choose two)

Answer: B,C

Explanation:
To achieve sub-50 millisecond convergence after a link or node failure, the design must rely on precomputed protection paths and local repair mechanisms in the data plane. The following mechanisms meet this requirement:
* B. Ti-LFA (Topology Independent Loop-Free Alternate): A next-generation fast reroute method used in Segment Routing. It offers local protection by computing loop-free backup paths that are independent of the specific failure type (node or link). It's capable of sub-50 ms convergence by rerouting traffic immediately on failure.
* D. MPLS-FRR (Fast Reroute): A traditional mechanism in MPLS networks that provides pre-signaled backup Label Switched Paths (LSPs). It enables fast switchover upon failure detection-also under 50 ms.
Other options:
* A. BFD: Provides fast failure detection, but does not provide the actual traffic reroute mechanism.
* C. Minimal BGP scan time: Impacts control plane responsiveness but not sub-50 ms convergence.
* E. IGP fast hello: Improves failure detection but alone doesn't guarantee traffic reroute under 50 ms.


NEW QUESTION # 378
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