Associated certification : CCDE v3.0

Exam overview
The CCDE v3.0 Written exam (400-007) will validate that candidates have the expertise to gather and clarify network functional requirements, develop network designs to meet functional specifications, develop implementation plans, convey design decisions and their rationale, and possess expert-level knowledge including:

Business Strategy Design
Control, data, and management plane design
Network Design
Service Design
Security Design


Exam preparation

Resources
CCDE v3.0 exam format
CCDE v3 exam topics
CCDE v3.0 learning matrix

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CCDE v3.0 Unified Exam Topics

Exam Description:
The exam topics below are general guidelines for the content likely to be included on both the CCDE Written (400-007) and the CCDE Practical exam.
The CCDE v3.0 Written exam (400-007) is a two-hour, multiple choice test with 90-110 questions, that focuses on core Enterprise network architectures and technologies.
The CCDE v3.0 Practical Exam is an 8-hour scenario-based exam, that focuses on core Enterprise network architectures and technologies, as well as on your selected area of expertise.
Both exams validate your knowledge, skills, and abilities throughout the entire network design lifecycle.
Both exams are closed book and no outside reference materials are allowed.

Your knowledge, skills, and abilities of recommending, building, validating, optimizing, and adapting technologies/solutions in the context of complex high-level network designs will be tested throughout
the exam:

• Recommend technologies or solutions that align with the stated requirements.
• Justify why a given decision was made.
• Make design choices and fully design solutions that complies with the stated requirements.
• Validate existing designs to ensure they are compliant with all requirements, as well as suggesting design changes to accommodate for changed specifications or requirements in the network.
• Perform optimizations of existing network designs to fix issues or mitigate risks.
• Build high-level implementation plans/steps.
• Recommend, build, or justify strategies.

For more information about the exam format and the technologies covered within your exam, please refer to:
• CCDE v3.0 Written and Practical Exam Format
• Core – technology list
• Workforce Mobility – technology list
• On-Prem and Cloud Services – technology list
• Large Scale Networks – technology list

15% 1.0 Business Strategy Design
1.1 Impact on network design, implementation, and optimization using various customer project management methodologies (for instance waterfall and agile)
1.2 Solutions based on business continuity and operational sustainability (for instance RPO, ROI, CAPEX/OPEX cost analysis, and risk/reward)

25% 2.0 Control, data, management plane and operational design
2.1 End-to-end IP traffic flow in a feature-rich network
2.2 Data, control, and management plane technologies
2.3 Centralized, decentralized, or hybrid control plane
2.4 Automation/orchestration design, integration, and on-going support for networks (for instance interfacing with APIs, model-driven management, controller-based technologies, evolution to CI/CD framework)
2.5 Software-defined architecture and controller-based solution design (SD-WAN, overlay, underlay, and fabric)

30% 3.0 Network Design
3.1 Resilient, scalable, and secure modular networks, covering both traditional and softwaredefined architectures, considering:
3.1.a Technical constraints and requirements
3.1.b Operational constraints and requirements
3.1.c Application behavior and needs
3.1.d Business requirements
3.1.e Implementation plans
3.1.f Migration and transformation

15% 4.0 Service Design
4.1 Resilient, scalable, and secure modular network design based on constraints (for instance technical, operational, application, and business constraints) to support applications on the IP network (for instance voice, video, backups, data center replication, IoT, and storage)
4.2 Cloud/hybrid solutions based on business-critical operations
4.2.a Regulatory compliance
4.2.b Data governance (for instance sovereignty, ownership, and locale)
4.2.c Service placement
4.2.d SaaS, PaaS, and IaaS
4.2.e Cloud connectivity (for instance direct connect, cloud on ramp, MPLS direct connect, and WAN integration)
4.2.f Security

15% 5.0 Security Design
5.1 Network security design and integration
5.1.a Segmentation
5.1.b Network access control
5.1.c Visibility
5.1.d Policy enforcement
5.1.e CIA triad
5.1.f Regulatory compliance (if provided the regulation)

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Question 1:
A company plans to establish a new network using Cisco Catalyst switches for its multicast applications. What is the disadvantage when two multicast applications are using the multicast IP addresses 234.17.4.5 and 234.145.4.5 inside the same network?

A. The routers doing PIM-SM cannot distinguish between the two multicast applications.
B. Only one multicast stream is received at the port where the receivers from both applications are located.
C. Both multicast senders will always receive the multicast packets from the other multicast application.
D. Multicast packets from both applications are flooded to all Layer 2 ports in a segment where a multicast receiver is located
E. Multicast packets from both applications are flooded to ports where one multicast receiver from one application is located.

Correct Answer: E

Question 2:
A many-to-many enterprise messaging application is using multicast as a transport mechanism. As part of the network design for this application, which multicast address should be used, according to best practices outlined in RFC 2365?

A. 224.0.0.60
B. 239.128.0.60
C. 239.193.0.60
D. 232.192.0.60

Correct Answer: C

Question 3:
A planned EBGP network will use OSPF to reach the EBGP peer addresses. Which of these conditions should be avoided in the design that could otherwise cause the peers to flap continuously?

A. IP addresses used to peer are also being sent via EBGP
B. The OSPF area used for peering is nonbackbone (not area 0).
C. An ACL blocks TCP port 179 in one direction.
D. The routers are peered by using a default route sent by OSPF.

Correct Answer: A

Question 4:
In a redesign of a multiple-area network, it is recommended that summarization is to be implemented. For redundancy requirements, summarization is done at multiple locations for each summary. Some customers now complain of higher latency and performance issues for a server hosted in the summarized area. What design issues should be considered when creating the summarization?

A. Summarization prevents the visibility of the metric to the component subnets.
B. Summarization creates routing loops.
C. Summarization adds CPU overhead on the routers sourcing the summarized advertisement.
D. Summarization causes packet loss when RPF is enabled.

Correct Answer: A

Question 5:
Which two techniques are used in a network design to slow down the distribution of topology information caused by a rapidly flapping link? (Choose two.)

A. link-state incremental SPF
B. Bidirectional Forwarding Detection
C. IP event dampening
D. link-state partial SPF
E. LSA throttling

Correct Answer: D,E