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Cisco 300-420 Exam Syllabus Topics:

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

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                                          Cisco Designing Cisco Enterprise Networks Sample Questions (Q395-Q400):

                                          NEW QUESTION # 395
                                          An existing network solution is using BFD in echo mode. Several of the network devices are experiencing high CPU utilization which an engineer has determined is related to the BFD feature. Which solution should the engineer leverage to reduce the CPU load?

                                          Answer: C


                                          NEW QUESTION # 396
                                          An engineer must use YANG with an XML representation to configure a Cisco IOS XE switch with these specifications:
                                          * IP address 10.10.10.10/27 configured on the interface GigabitEthernet2/1/0
                                          * connectivity from a directly connected host 10.10.10.1/27
                                          Which YANG data model set must the engineer choose?

                                          Answer: D

                                          Explanation:
                                          The correct model set is the one that configures the IOS XE interface GigabitEthernet2/1/0 with IPv4 address
                                          10.10.10.10 and prefix length 27 using valid XML according to the selected YANG schema. The directly connected host address 10.10.10.1/27 confirms the subnet relationship; both addresses belong to 10.10.10.0
                                          /27, so the interface configuration must use that prefix length rather than a host mask or an unrelated network.
                                          YANG-based configuration is strict: the namespace, container hierarchy, interface type, interface name, and address fields must match the device model. If an option places GigabitEthernet under the wrong container, represents the mask incorrectly, or uses a schema from a different model family, the device will reject the payload or configure the wrong object. Option D correctly represents the IOS XE XML structure and the required addressing. In real operations, the engineer should follow this with a get-config readback against the running datastore to prove that the structured configuration committed as intended. Reference topics: IOS XE interface YANG, XML payload structure, NETCONF configuration, IPv4 subnet validation.


                                          NEW QUESTION # 397
                                          Refer to the exhibit. An architect is designing a BGP solution to connect a remote branch to a service provider. There are several prefixes within the branch that the company does not want to be advertised to the internet. Which solution should the architect use to accomplish this?

                                          Answer: A


                                          NEW QUESTION # 398
                                          A company must automate a set of complex changes aligned with DR testing in the network. These changes are specific, and the DR playbook will be adjusted in the future. The playbook has diverse routing and switching assets in scope as well as multiple vendor and hardware platforms. A developer will create a thin, web front-end microservice and integrate with an Open daylight controller to push changes to the network.
                                          Which YANG model should be used?

                                          Answer: D

                                          Explanation:
                                          An open YANG model is the correct choice because the automation scope is multivendor and the workflow must be reusable across diverse routing and switching platforms. Native vendor models expose platform- specific details and are valuable when a feature is unique to one operating system, but they create code branching and operational inconsistency when many vendors and hardware families are in scope. The question also says the DR playbook will be adjusted in the future, which argues for a model that reduces redesign whenever a device vendor or platform changes. Open models, such as IETF or OpenConfig where supported, provide common schema structures for standard network functions and allow the microservice and controller integration to remain cleaner. A custom individualized model would increase development and maintenance burden, not reduce it, unless there is a very specific abstraction layer requirement. Using a single native vendor model cannot support the stated multivendor environment. The professional design is to use open models wherever coverage is sufficient, then fall back to native models only for unsupported platform- specific capabilities. Reference topics: YANG model selection, OpenConfig, IETF YANG, Cisco native YANG, multivendor automation.


                                          NEW QUESTION # 399
                                          Refer to the exhibit.

                                          Refer to the exhibit. Customers report low video quality and delays when having point-to-point telepresence video calls between the two locations. An architect must optimize a design so that traffic follows the same path for egress and ingress traffic flows. Which technique optimizes the design?

                                          Answer: B


                                          NEW QUESTION # 400
                                          ......

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