Actual Cisco 300-420 Exam Questions And Correct Solution

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Cisco 300-420 Exam Syllabus Topics:

SectionWeightObjectives
Security Services10%- Security architecture design
  • 1. Network segmentation
    • 2. Threat defense integration
      - Secure connectivity
      Advanced Addressing and Routing Solutions25%- IPv4 and IPv6 addressing design
      • 1. Structured addressing plans
        • 2. Route summarization and aggregation
          - Routing protocol design
          • 1. IS-IS design
            • 2. Route redistribution and filtering
              • 3. OSPF design
                • 4. EIGRP design
                  Advanced Enterprise Campus Networks25%- Layer 2 campus design
                  • 1. Spanning Tree Protocol optimization
                    • 2. Hierarchical architecture
                      • 3. VLAN and trunking design
                        - Wireless integration
                        - Layer 3 campus design
                        • 1. Routing in campus infrastructure
                          • 2. Virtualization and segmentation
                            Software-Defined Access (SDA)5%- Fabric design and deployment
                            - Control plane and data plane design
                            - SD-Access architecture
                            Network Services15%- IP services
                            • 1. DHCP, DNS, NAT
                              - Multicast design
                              - Quality of Service (QoS)
                              • 1. Policing, shaping, congestion management
                                • 2. Classification and marking
                                  WAN for Enterprise Networks20%- VPN design
                                  • 1. DMVPN, L2VPN, L3VPN
                                    • 2. Site-to-site VPN
                                      - 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 (Q431-Q436):

                                          NEW QUESTION # 431
                                          Which two routing protocols allow for unequal cost load balancing? (Choose two.)

                                          Answer: B,D


                                          NEW QUESTION # 432
                                          An engineer is designing a PIM Anycast RP solution between two data centers. The design must ensure that RP1 in DC1 and RP2 in DC2 inform each other about specific sources that have joined locally. Which solution must the engineer choose?

                                          Answer: D


                                          NEW QUESTION # 433
                                          Refer to the exhibit. An architect is designing a Layer 3 routed network using point-to-point fiber links between the topology layers. BFD is supported on the software that runs within the infrastructure. Is BFD required within the design to provide sub-second convergence in the event of a fiber breakage?

                                          Answer: D

                                          Explanation:
                                          BFD is not required for the specific failure described: a physical fiber break on point-to-point routed links. In a Layer 3 campus or routed-access design, a direct physical link failure is detected by the interface state change, so the routing protocol can react immediately without waiting for hello/dead timers. Cisco campus design guidance favors point-to-point routed links partly because they give rapid convergence and avoid STP delays. BFD is valuable when a forwarding-path failure is not reliably detected by Layer 1 or Layer 2, or when a protocol adjacency must detect loss faster than its native timers. It does not automatically create convergence by itself; it detects failure and notifies the routing protocol. For a clean fiber cut on a routed point-to-point link, link-down detection is already fast enough for sub-second failover in the design. OSPF timer tuning is also not the preferred design answer for this physical-failure case. Reference topics: routed access design, point-to-point links, link-failure detection, BFD, OSPF convergence.


                                          NEW QUESTION # 434
                                          Refer to the exhibit.

                                          Refer to the exhibit. An architect must design a solution to connect bank site A with bank site B and support:
                                          network operation center monitoring end-to-end L3VPN and L2VPN traffic
                                          company adding thousands of routes in the next two years
                                          Which two BGP solutions must the design include? (Choose two.)

                                          Answer: B,C


                                          NEW QUESTION # 435

                                          Refer to the exhibit. An engineer must design an address translation solution to provide Internet connectivity for the corporate network. The design Is restricted to the 172.16.168.0/22 subnet. Which solution must the engineer choose?

                                          Answer: D


                                          NEW QUESTION # 436
                                          ......

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