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Cisco 300-420 Exam Syllabus Topics:

SectionWeightObjectives
WAN for Enterprise Networks20%- WAN resiliency and high availability
- VPN design
  • 1. Site-to-site VPN
    • 2. DMVPN, L2VPN, L3VPN
      - WAN connectivity options
      • 1. MPLS, Metro Ethernet, 4G/5G
        • 2. SD-WAN architecture and design
          Advanced Addressing and Routing Solutions25%- IPv4 and IPv6 addressing design
          • 1. Route summarization and aggregation
            • 2. Structured addressing plans
              - Routing protocol design
              • 1. Route redistribution and filtering
                • 2. EIGRP design
                  • 3. OSPF design
                    • 4. IS-IS design
                      Network Services15%- Quality of Service (QoS)
                      • 1. Classification and marking
                        • 2. Policing, shaping, congestion management
                          - IP services
                          • 1. DHCP, DNS, NAT
                            - Multicast design
                            Software-Defined Access (SDA)5%- Fabric design and deployment
                            - Control plane and data plane design
                            - SD-Access architecture
                            Security Services10%- Secure connectivity
                            - Security architecture design
                            • 1. Threat defense integration
                              • 2. Network segmentation
                                Advanced Enterprise Campus Networks25%- Layer 2 campus design
                                • 1. VLAN and trunking design
                                  • 2. Spanning Tree Protocol optimization
                                    • 3. Hierarchical architecture
                                      - Layer 3 campus design
                                      • 1. Virtualization and segmentation
                                        • 2. Routing in campus infrastructure
                                          - Wireless integration

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                                          Cisco Designing Cisco Enterprise Networks Sample Questions (Q147-Q152):

                                          NEW QUESTION # 147
                                          What is a benefit of using VRRPv3 as compared to VRRPv2?

                                          Answer: A

                                          Explanation:
                                          VRRPv3 improves protocol applicability by supporting both IPv4 and IPv6 address families. VRRPv2 is associated with IPv4 virtual router redundancy, while VRRPv3 extends the protocol so the same first-hop redundancy concept can be used for IPv6 default gateways as well. In campus and branch designs, this matters because IPv6 deployments should not require a separate redundancy design from IPv4 when a standards-based FHRP is preferred. Preemption is not a unique VRRPv3 advantage because VRRP has long supported priority-based master election and preemption behavior. Authentication is also not the correct differentiator in this comparison; VRRPv3 removed the simple protocol authentication field from the base protocol and expects security to be provided by the underlying network or IPsec where required. Stateful switchover is a platform high-availability capability, not a VRRPv3 protocol feature. Therefore, the key benefit of VRRPv3 over VRRPv2 for enterprise design is IPv4 and IPv6 support under the same redundancy protocol model.


                                          NEW QUESTION # 148
                                          What is a challenge of the SaaS model?

                                          Answer: A

                                          Explanation:
                                          In the Software-as-a-Service (SaaS) model, users rely on the service provider to manage the infrastructure and applications. While this reduces the burden of maintenance and upgrades, it also limits the control customers have over the underlying infrastructure and applications. This lack of control can be a challenge for organizations that need to customize or manage specific aspects of the application or infrastructure to meet their unique requirements.


                                          NEW QUESTION # 149
                                          How do endpoints inside an SD-Access network reach resources outside the fabric?

                                          Answer: A

                                          Explanation:
                                          Explanation
                                          https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html
                                          "Packets and frames sourced from inside the fabric and destined outside of the fabric are de-encapsulated by the border node"(not the edge node)


                                          NEW QUESTION # 150
                                          Which design element should an engineer consider when multicast is included in a Cisco SD-Access architecture?

                                          Answer: D


                                          NEW QUESTION # 151
                                          An engineer must design a routing solution for a company that is single-homed to an ISP. The company's goal is to run BGP between theCEand the PE devices. To support running BGP, the company obtained a public AS number and IP subnet from ARIN. Which solution must the engineer select?

                                          Answer: C


                                          NEW QUESTION # 152
                                          ......

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