試験の準備方法-実際的な300-420資格専門知識試験-権威のある300-420勉強資料

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Cisco 300-420 Exam Syllabus Topics:

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

                                          >> 300-420資格専門知識 <<

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                                          Cisco Designing Cisco Enterprise Networks 認定 300-420 試験問題 (Q69-Q74):

                                          質問 # 69
                                          Refer to the exhibit.

                                          EIGRP has been configured on all links. The spoke nodes have been configured as EIGRP stubs, and the WAN links to R3 have higher bandwidth and lower delay than the links to R4. When a link failure occurs at the R1-R2 link, what happens to traffic on R1 that is destined for a subnet attached to R2?

                                          正解：A

                                          解説：
                                          The EIGRP stub routing feature will prevent the remote device from advertising core routes back to the distribution devices. Routes learned by the remote device from Distribution 1 will not be advertised to Distribution 2. Therefore, Distribution 2 will not use the remote device as a transit for traffic destined to the network core https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-eigrp-stub-rtg.html


                                          質問 # 70
                                          A customer requires QoS to support multimedia conferencing over MPLS. The network architect chooses to use per-hop behavior. Which solution must the architect use to classify and mark traffic traveling between branch sites?

                                          正解：C


                                          質問 # 71
                                          Drag and drop the model driven telemetry characteristics from the left onto the mode they belong to on the right.

                                          正解：

                                          解説：

                                          Explanation
                                          Graphical user interface, diagram Description automatically generated with medium confidence


                                          質問 # 72
                                          A network engineer must segregate three interconnected campus networks using IS-IS routing.
                                          A two-layer hierarchy must be used to support large routing domains and to avoid more specific routes from each campus network being advertised to other campus network routers automatically.
                                          Which two actions does the engineer take to accomplish this segregation? (Choose two.)

                                          正解：C、D


                                          質問 # 73
                                          A branch office has a primary L3VPN MPLS connection back to the main office and an IPSEC VPN tunnel that serves as backup. Which design ensures that data is sent over the backup connection only if the primary MPLS circuit is down?

                                          正解：A

                                          解説：
                                          Static routes tied to IP SLA with a floating static backup route provide the cleanest active/standby design for this requirement. The MPLS L3VPN path is the primary connection and should carry traffic while it is available. IP SLA can actively test reachability across the primary path, and object tracking can remove the primary static route if the test fails. The backup IPsec VPN route is configured with a higher administrative distance, so it remains inactive until the primary route is withdrawn. This design is deterministic and prevents traffic from using the backup tunnel during normal operation. Running EIGRP across both paths could allow dynamic path selection, but it would require careful metric manipulation and could still introduce unintended failover behavior. BGP multipath is the opposite of the requirement because it is designed to install multiple paths simultaneously for load sharing. OSPF passive-interface on the backup connection would prevent neighbor formation rather than provide reliable backup routing. For a branch with one primary MPLS path and one backup IPsec path, tracked static routing with IP SLA is the appropriate design.


                                          質問 # 74
                                          ......

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