100% Pass 2026 Newest Cisco 400-007: Cisco Certified Design Expert (CCDE) Written Exam Latest Exam Answers

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Cisco 400-007 Exam Syllabus Topics:

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

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Cisco Certified Design Expert (CCDE) Written Exam Sample Questions (Q398-Q403):

NEW QUESTION # 398
Network operators have many options available, from fully centralized to fully distributed control planes, and each approach has its own set of characteristics. Drag and drop the characteristics from the left onto the corresponding approach on the right.

Answer:

Explanation:

NEW QUESTION # 399
Two enterprise networks must be connected together. Both networks are using the same private IP addresses.
The client requests from both sides should be translated using hide NAT (dynamic NAT) with the overload feature to save IF addresses from the NAT pools.
Which design addresses this requirement using only one Cisco I OS NAT router for both directions?

A. This is not possible, because two Cisco IOS NAT routers are required to do dynamic NAT, with overload in both directions.
B. The Nat Virtual interface must be used to achieve this requirement.
C. The ip nat inside and ip nat outside commands must be configured at the interfaces with the overload option in both directions.
D. Two different NAT pools must be used for the ip nat inside source and the ip nat outside source commands for the overload feature in both directions.
E. The overload feature is the default and does not have to be configured.

Answer: D

NEW QUESTION # 400
A multicast network is using 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. Manipulate the administration distance of the unicast routes to the two RPs
C. Use anycast RP based on MSDP peering between the two RPs
D. Manipulate the multicast routing table by creating static mroutes to the two RPs
E. Control routing to the two RPs through a longest match prefix
F. Use two phantom RP addresses

Answer: E,F

Explanation:
InBidirectional PIM, redundancy for Rendezvous Points (RPs) is provided through thePhantom RP mechanism. This setup offers HA by:
* A. Using two phantom RP addresses: You configure two RPs with the same virtual RP address but advertise them with loopback interfaces having different subnet masks. These phantom RPs allow seamless failover between active and standby RPsdatatracker.ietf.org+14arubanetworking.hpe.
com+14examtopics.com+14ciscolive.com+3examtopics.com+3ccie-sp.gitbook.io+3learnwithsalman.
com+4lostintransit.se+4learningnetwork.cisco.com+4.
* F. Controlling routing through a longest match prefix: The active RP is chosen based on unicast routing - the loopback with the longest prefix match to the RP address is preferred. If that RP fails, the IGP converges and the standby with the next-longest prefix becomes activearubanetworking.hpe.com.
This combined mechanism aligns with CCDE v3.1 design principles by ensuring multicast HA with minimal complexity - no MSDP involvement and leveraging existing IGP behaviors.
Why other options are incorrect:
* B&D: Changing administrative distance or protocol advertisement doesn't inherently establish redundancy in Bidir-PIM RP selection.
* C: Static mroutes are static and don't support dynamic redundancy or failover.
* E: Anycast RP with MSDP is not supported or needed in Bidir-PIM environments.
This design ensures robust, seamless RP redundancy using phantom RPs with longest-prefix selection logic, remaining cost-effective and operationally concise.
https://community.cisco.com/t5/networking-knowledge-base/rp-redundancy-with-pim-bidir-phantom-rp/ta-p
/3117191

NEW QUESTION # 401
What is a characteristic of a secure cloud architecture model?

A. dedicated and restricted workstations
B. limited access to job function
C. software-defined network segmentation
D. multi-factor authentication

Answer: C

NEW QUESTION # 402
A consultant needs to evaluate project management methodologies for a new service deployment on the existing network of a customer. The customer wants to be involved in the end-to-end project progress and be provided with frequent updates. The customer also wants the ability to change the requirements if needed, as the project progresses. Which project management methodology should be used?

A. Waterfall
B. phased
C. Agile
D. three principles

Answer: D

NEW QUESTION # 403
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