2026 Cisco 300-420–High Pass-Rate Detailed Study Dumps

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Cisco 300-420 Exam Syllabus Topics:

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

                                          >> Detailed 300-420 Study Dumps <<

                                          300-420 Valid Exam Topics - Latest 300-420 Exam Test

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                                          Cisco Designing Cisco Enterprise Networks Sample Questions (Q368-Q373):

                                          NEW QUESTION # 368

                                          Refer to the exhibit. Area 10 is a regular OSPF area and networks 10.1.1.0/24 and 172.16.1.0/24 are internal.
                                          Which design provides optimal routing between both networks when the link between routers C and E fails?

                                          Answer: A


                                          NEW QUESTION # 369
                                          An infrastructure team is concerned about the shared memory utilization of a device, and for this reason, they need to monitor the device state. Which solution limits impact on the device and provides the required data?

                                          Answer: D

                                          Explanation:
                                          An on-change telemetry subscription is the best solution when the team needs device state data while limiting impact on the device. With periodic telemetry, the device sends subscribed data at a configured interval regardless of whether the value has changed. For state such as shared memory utilization, aggressive periodic polling or streaming can create unnecessary CPU, memory, and bandwidth overhead, especially at scale. On- change telemetry sends an update only when the subscribed data changes, or when a relevant event occurs according to the model and platform behavior. This reduces needless data transmission while still providing timely visibility into meaningful state changes. IPFIX is designed for flow information and traffic accounting rather than detailed device state telemetry. Static telemetry is not the best characterization of the efficient event-driven behavior required here. A periodic subscription can provide the data, but it continuously streams updates and therefore has greater device and collector impact. Cisco model-driven telemetry design favors on- change subscriptions when the operational requirement is state awareness with minimal repeated polling.


                                          NEW QUESTION # 370
                                          An architect must design an IPv6 migration solution for a corporation with remote offices to support:
                                          * The customer has IPv4 peering with their service provider.
                                          * IPv6 users need access to IPv4 and IPv6 resources.
                                          * Existing content providers will migrate to IPv6 in the next two years.
                                          * Users will be migrated in a phase-by-phase approach.
                                          Which migration solution must the architect choose?

                                          Answer: B

                                          Explanation:
                                          Dual-stack is the correct IPv6 migration strategy for this corporation. The requirements state that users need access to both IPv4 and IPv6 resources, content providers will migrate over the next two years, and users will move in phases. Dual-stack supports exactly that model because hosts, routers, and services can run IPv4 and IPv6 simultaneously. Applications can select IPv6 or IPv4 based on DNS responses and protocol availability, while the organization gradually enables IPv6 without breaking existing IPv4 connectivity. NAT64 is useful for IPv6-only clients reaching IPv4-only services, but it introduces translation state and does not provide native dual protocol operation. NAT46 is a specialized translation direction and not the broad migration strategy here. Tunneling can connect IPv6 islands across IPv4 infrastructure, but the customer already has IPv4 peering and needs a phased endpoint and application migration, not only island interconnection. Dual- stack is straightforward operationally and gives the longest coexistence window while providers and applications transition. Reference topics: IPv6 migration, dual-stack deployment, DNS-based protocol selection, IPv4 and IPv6 coexistence, phased migration.


                                          NEW QUESTION # 371
                                          What is the purpose of a border node in a Cisco SD-Access fabric?

                                          Answer: C


                                          NEW QUESTION # 372
                                          An architect is designing how the company will manage the infrastructure of a large data center.
                                          The company wants to group device types for security reasons and mitigate DoS attacks. The company also wants to ensure that access to the rest of the production network is not possible if one device is compromised on the management plane. Which solution must the architect choose?

                                          Answer: A


                                          NEW QUESTION # 373
                                          ......

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