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Cisco 300-420 Exam Syllabus Topics:

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

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                                          Cisco Designing Cisco Enterprise Networks Sample Questions (Q87-Q92):

                                          NEW QUESTION # 87
                                          An engineer must propose a solution for a campus network that includes the capability to create multiple Layer 3 virtual networks. Each network must have its own addressing structure and routing table for data forwarding. The solution must be scalable to support hundreds of virtual networks and allow simple configuration and management with minimal administrative overhead. Which solution does the engineer recommend?

                                          Answer: B


                                          NEW QUESTION # 88
                                          A company is planning to open two new branches and allocate the 2a01:c30:16:7009::3800/118 IPv6 network for the region. Each branch should have the capacity to accommodate maximum of 200 hosts. Which two networks should the company use? (Choose two.)

                                          Answer: D,E


                                          NEW QUESTION # 89
                                          An engineer is designing a QoS solution for a campus. The design must guarantee real-time traffic delivery during congestion, minimize the bandwidth consumption for possible virus or worm attacks, and reduce flooding of excessive traffic during times of congestion. Which two solutions must the engineer select? (Choose two.)

                                          Answer: A,B


                                          NEW QUESTION # 90
                                          An engineer is designing a QoS policy that queues excess packets for later transmission. Which mechanism must be included in the design?

                                          Answer: A

                                          Explanation:
                                          Traffic shaping is the QoS mechanism that queues excess packets and transmits them later to conform to a configured rate. In Cisco QoS design, shaping smooths bursts by buffering traffic instead of immediately discarding it when the offered rate exceeds the configured rate. This makes shaping appropriate on egress interfaces where the enterprise router has a higher physical interface speed than the actual provider committed information rate. WRED and RED are congestion-avoidance mechanisms that drop packets probabilistically to prevent full queue exhaustion, especially for TCP traffic. They do not intentionally hold excess packets for later transmission as the primary behavior. Policing enforces a traffic rate by dropping or remarking traffic that exceeds the configured contract; it does not buffer traffic to smooth bursts. Therefore, when the design requirement says excess packets must be queued for later transmission, the mechanism must be shaping. In WAN edge QoS, shaping is often paired with child queuing policies so latency-sensitive and business-critical classes receive correct treatment inside the shaped parent rate.


                                          NEW QUESTION # 91
                                          Drag and drop the characteristics from the left onto the telemetry mode they apply to on the right.

                                          Answer:

                                          Explanation:


                                          NEW QUESTION # 92
                                          ......

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