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Cisco 300-420 Exam Syllabus Topics:

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

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                                          Cisco Designing Cisco Enterprise Networks Sample Questions (Q65-Q70):

                                          NEW QUESTION # 65
                                          An engineer must design a solution to provide backup connectivity between two sites. The engineer plans to use an Internet connection but company policy requires the connection to be encrypted. Additionally, there are several applications that utilize multicast to deliver video streams between the sites. Which technology should the design include?

                                          Answer: A

                                          Explanation:
                                          GRE over IPsec is required when the backup connection is an Internet circuit, encryption is mandatory, and multicast applications must cross the tunnel. GRE provides the logical tunnel interface and can encapsulate multicast traffic and routing protocol packets. IPsec then encrypts the GRE packets across the public Internet, satisfying the security requirement. This combination is widely used in enterprise WAN designs where dynamic routing, multicast video, or other non-unicast traffic must be transported securely between sites.
                                          Direct IPsec encapsulation protects unicast IP traffic, but it does not natively provide a multicast-capable tunnel interface for routing and multicast services. GETVPN is designed for private WAN environments where the provider network can carry the routed addresses and where tunnel-less group encryption is desired; it is not the usual choice for Internet backup. DMVPN could also use GRE and IPsec, but for a simple backup connection between two sites, GRE over IPsec is the direct answer. Reference topics: GRE tunneling, IPsec encryption, multicast over VPN, Internet backup WAN design.


                                          NEW QUESTION # 66
                                          Which three basic types of SD-WAN deployments are out on the market? (Choose three.)

                                          Answer: A,B,F


                                          NEW QUESTION # 67
                                          Refer to the exhibit. A large company is planning to deploy OSPF in this environment.
                                          - All routers will be in Area 0.
                                          - R1 will support an isolated environment that does not require routing outside of the networks that it runs locally, but it must be able to access the internet.
                                          - R5 will serve as the access point to the internet.
                                          While planning for the new deployment, the engineering team noticed that router R1 has been having memory issues. Which action with an updated OSPF design reduces the resource load on R1?

                                          Answer: C

                                          Explanation:
                                          Configuring R1 as a stub router reduces its OSPF memory and CPU requirements by preventing it from receiving unnecessary external route advertisements. R1 will receive a default route from its neighbor (to R5 for internet access) while not maintaining a full OSPF database, directly addressing its resource limitations.


                                          NEW QUESTION # 68
                                          Which two techniques improve the application experience in a Cisco SD-WAN design? (Choose two.)

                                          Answer: D,E


                                          NEW QUESTION # 69
                                          Which is a function of the Proactive Insights feature of Cisco DNA Center Assurance?

                                          Answer: A


                                          NEW QUESTION # 70
                                          ......

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