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Cisco 400-007 Exam Syllabus Topics:

SectionObjectives
MPLS and VPN Architectures- VPN design
  • 1. Multi-site connectivity strategies
    • 2. L3VPN and L2VPN design models
      - MPLS fundamentals
      • 1. MPLS scalability design
        • 2. Label switching architecture
          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
                  Infrastructure Design (Layer 2 / Layer 3)- Layer 3 design
                  • 1. IP addressing and summarization
                    • 2. IGP selection and design
                      - Layer 2 technologies
                      • 1. Spanning Tree design considerations
                        • 2. Ethernet scaling and segmentation
                          Routing and Path Control- Routing protocol design
                          • 1. BGP policy and scalability
                            • 2. OSPF / IS-IS architecture
                              - Traffic engineering
                              • 1. Path optimization techniques
                                • 2. Policy-based routing considerations
                                  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
                                          Network Design Methodology and Principles- Requirements gathering and analysis
                                          • 1. Business and technical constraints
                                            • 2. Stakeholder requirements mapping
                                              - Design lifecycle and methodology
                                              • 1. Trade-off analysis techniques
                                                • 2. Design phases and validation approaches

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                                                  Cisco Certified Design Expert (CCDE) Written Exam Sample Questions (Q94-Q99):

                                                  NEW QUESTION # 94
                                                  An enterprise requires MPLS connected branches to access cloud-based Microsoft 365 services over an SD-WAN solution. Internet access Is available only at dual regional hub sites that are connected to the MPLS network.
                                                  Which connectivity method provides an optimum access method to the cloud- based services If one ISP suffers loss or latency?

                                                  Answer: B

                                                  Explanation:
                                                  Cloud OnRamp gateway site is only one of a few method to optimise SAAS connectivity within a SDWAN implementation. the overarching solution is 'Cloud OnRmap SAAS'. with the options provided D is the most accurate answer
                                                  https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/cloudonramp/vedge-20- x/cloud-onramp-book-vedge/cor-saas.html#common-scenarios-cor-saas-b


                                                  NEW QUESTION # 95
                                                  Traditionally, infrastructure is not managed using code, but instead it is managed and provisioned manually, which can cause potential issues. On the other side, infrastructure as code brings several advantages. What is a benefit of infrastructure as code?

                                                  Answer: B

                                                  Explanation:
                                                  Repeatable deployments is a key benefit of infrastructure as code (IaC). By defining infrastructure in code, deployments can be automated and consistently reproduced, ensuring that the same environment is created every time, eliminating human error and inconsistencies.


                                                  NEW QUESTION # 96
                                                  What is a characteristic of a secure cloud architecture model?

                                                  Answer: C


                                                  NEW QUESTION # 97
                                                  Refer to the exhibit.

                                                  Company XYZ must design a DMVPN tunnel between the three sites. Chicago is going to act as the NHS, and the company wants DMVPN to detect peer endpoint failures. Which technology should be used in the design?

                                                  Answer: A

                                                  Explanation:
                                                  In a DMVPN (Dynamic Multipoint VPN) design:
                                                  * One site (here, Chicago) functions as the Next Hop Server (NHS), which facilitates dynamic spoke-to- spoke tunnel establishment.
                                                  * DMVPN is based on multipoint GRE tunnels combined with NHRP (Next Hop Resolution Protocol).
                                                  * The ability to detect remote tunnel endpoint failures is essential for reliable routing convergence and tunnel restoration.
                                                  While GRE (Option C) is the encapsulation mechanism used in DMVPN, it does not inherently provide failure detection. Likewise, VPLS and L2TPv3 are Layer 2 VPN technologies and not applicable in DMVPN design.
                                                  To meet the requirement of peer failure detection, the correct mechanism is:
                                                  * B. IP SLA (Service-Level Agreement): This is a feature that actively monitors the health and reachability of tunnel endpoints through periodic probes (e.g., ICMP echo). When the peer becomes unreachable, routing protocol adjacencies can be withdrawn, and alternate paths selected.
                                                  Using IP SLA in a DMVPN design helps detect endpoint failure scenarios such as:
                                                  * A spoke going down unexpectedly
                                                  * Loss of return traffic
                                                  * Partial link failures
                                                  This design pattern is aligned with CCDE v3.1 "Protocol Design Implications", emphasizing resiliency, fault detection, and efficient routing convergence in overlay VPN designs like DMVPN.


                                                  NEW QUESTION # 98
                                                  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 # 99
                                                  ......

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