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Cisco 300-420 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Advanced Enterprise Campus Networks25%- Layer 2 campus design
  • 1. Spanning Tree Protocol optimization
    • 2. VLAN and trunking design
      • 3. Hierarchical architecture
        - Wireless integration
        - Layer 3 campus design
        • 1. Virtualization and segmentation
          • 2. Routing in campus infrastructure
            Topic 2: Software-Defined Access (SDA)5%- Fabric design and deployment
            - SD-Access architecture
            - Control plane and data plane design
            Topic 3: Security Services10%- Security architecture design
            • 1. Threat defense integration
              • 2. Network segmentation
                - Secure connectivity
                Topic 4: Network Services15%- Quality of Service (QoS)
                • 1. Classification and marking
                  • 2. Policing, shaping, congestion management
                    - Multicast design
                    - IP services
                    • 1. DHCP, DNS, NAT
                      Topic 5: WAN for Enterprise Networks20%- VPN design
                      • 1. DMVPN, L2VPN, L3VPN
                        • 2. Site-to-site VPN
                          - WAN resiliency and high availability
                          - WAN connectivity options
                          • 1. MPLS, Metro Ethernet, 4G/5G
                            • 2. SD-WAN architecture and design
                              Topic 6: Advanced Addressing and Routing Solutions25%- IPv4 and IPv6 addressing design
                              • 1. Structured addressing plans
                                • 2. Route summarization and aggregation
                                  - Routing protocol design
                                  • 1. IS-IS design
                                    • 2. Route redistribution and filtering
                                      • 3. EIGRP design
                                        • 4. OSPF design

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                                          Cisco Designing Cisco Enterprise Networks Sample Questions (Q263-Q268):

                                          NEW QUESTION # 263
                                          What is one function of the vSmart controller in an SD-WAN deployment?

                                          Answer: B

                                          Explanation:
                                          Explanation/Reference:


                                          NEW QUESTION # 264
                                          An engineer is designing an enterprise campus network.
                                          The LAN infrastructure consists of switches from multiple vendors, and Spanning Tree must be used as a Layer 2 loop prevention mechanism.
                                          All configured VLANs must be grouped in two SIP instances.
                                          Which standards-based Spanning Tree technology supports this design solution?

                                          Answer: D


                                          NEW QUESTION # 265
                                          Drag and drop the elements from the left onto the functions they perform in the Cisco SD-WAN architecture on the right.

                                          Answer:

                                          Explanation:

                                          Explanation:
                                          The Cisco SD-WAN architecture mapping follows the standard controller and edge roles. WAN Edge devices are the data-plane routers that forward user traffic, build secure IPsec tunnels, participate in local routing, and apply QoS and security policies at sites. vSmart controllers provide the centralized control plane. They maintain overlay routing and policy information and distribute it to WAN Edge routers through OMP. vBond orchestrators provide the initial orchestration function, including device authentication assistance, control connection coordination, and NAT traversal support so devices can join the overlay. Depending on the exact drag-and-drop labels in the exhibit, the selected mapping assigns each element to its architectural function rather than to a deployment location. The important design principle is that vManage, vSmart, vBond, and WAN Edge have separate responsibilities and should be scaled and secured accordingly. vManage manages and monitors, vSmart controls routing and policy, vBond helps devices join and traverse NAT, and WAN Edge forwards traffic. Reference topics: Cisco SD-WAN architecture, WAN Edge, vSmart, vBond, OMP, control and data plane separation.


                                          NEW QUESTION # 266
                                          An engineer is designing an IPv4 addressing plan for an enterprise with 1000 branches. Each branch requires a prefix for data and a prefix for voice. Each prefix must accommodate up to 128 hosts, and prefixes must facilitate summarization at aggregation points in the network. The security team requires a simple method for identifying voce prefixes. Which allocation does the engineer recommend from the RFC1918 address space?

                                          Answer: C

                                          Explanation:
                                          The best allocation is to give each branch adjacent /24 prefixes from the 10.0.0.0/8 private range, using one
                                          /24 for data and the next contiguous /24 for voice. Each /24 provides 254 usable host addresses, which satisfies the requirement for up to 128 hosts. More importantly, pairing two contiguous /24s creates a clean
                                          /23 summary per branch. For example, 10.0.0.0/24 for data and 10.0.1.0/24 for voice summarize as 10.0.0.0
                                          /23; the next branch can use 10.0.2.0/24 and 10.0.3.0/24 summarized as 10.0.2.0/23. This pattern supports aggregation and keeps the security team's identification simple because voice prefixes can consistently use the odd-numbered third octet. Option C uses /25 prefixes, but /25 provides only 126 usable addresses, which fails a strict requirement for up to 128 hosts if the subnet and broadcast addresses are excluded. Separate
                                          172.16 ranges reduce per-site summarization clarity. Reference topics: RFC 1918 addressing, VLSM, route summarization, branch addressing design, data and voice prefix allocation.


                                          NEW QUESTION # 267
                                          An engineer is working with NETCONF and Cisco NX-OS based devices. The engineer needs a YANG model that supports a specific feature relevant only to Cisco NX-OS. Which model must the engineer choose?

                                          Answer: D


                                          NEW QUESTION # 268
                                          ......

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