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

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                                          Cisco Designing Cisco Enterprise Networks Sample Questions (Q312-Q317):

                                          NEW QUESTION # 312
                                          Drag and drop the elements from the left onto the YANG models where they and used on the right.

                                          Answer:

                                          Explanation:

                                          Explanation
                                          Diagram Description automatically generated


                                          NEW QUESTION # 313

                                          Refer to the exhibit An engineer working for a telecommunication company with an employee ID 4449:30
                                          959 Is calculating STP scalability for switches to ensure that the numbers are below the maximum supported value for STP logical ports How many logical interfaces are active for switch A?

                                          Answer: D

                                          Explanation:
                                          The active logical interface count for Switch A is 202 based on the spanning-tree scalability method used for logical ports. In STP design, a logical port is counted per active VLAN instance on each active trunk or access interface. A trunk carrying multiple VLANs therefore consumes multiple logical STP ports, while an access link normally consumes one logical STP port for its VLAN. Cisco campus design guidance uses logical-port counts to ensure that the selected STP mode and platform stay within supported scalability limits. The calculation in the exhibit produces 202 active logical interfaces for Switch A, not simply the number of physical links. Answer A counts only physical interfaces and ignores VLAN instances. Answer D is too low because it does not account for all active VLANs across the relevant links. Answer B overstates the count by including VLANs or links that are not active for Switch A. Reference topics: STP scalability, logical ports, VLAN instances, trunk design, Layer 2 campus sizing.


                                          NEW QUESTION # 314
                                          Refer to the exhibit. These requirements must be met:
                                          - VLANs span multiple access switches.
                                          - All VLANs are trunked on all access switch uplinks to distribution
                                          switches.
                                          - The STP version is Rapid PVST+.
                                          Which design provides the fastest spanning-tree convergence?

                                          Answer: D

                                          Explanation:
                                          Configuring link A as a Layer 3 routed link removes it from the Layer 2 topology, reducing the number of potential STP paths and preventing loops. Setting switch D as primary root and switch C as secondary root for VLAN 10 ensures predictable and optimal spanning-tree convergence with Rapid PVST+.


                                          NEW QUESTION # 315
                                          An engineer must design an addressing plan for a small business using a single /24 network. Each department must have its own subnet. Drag and drop the subnets from the left onto the departments requirements that they fulfill on the right. Not all options are used.

                                          Answer:

                                          Explanation:


                                          NEW QUESTION # 316
                                          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: A


                                          NEW QUESTION # 317
                                          ......

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