300-420 Exam Questions | 300-420 Latest Exam Guide

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Cisco 300-420 Exam Syllabus Topics:

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

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                                          Cisco Designing Cisco Enterprise Networks Sample Questions (Q313-Q318):

                                          NEW QUESTION # 313
                                          A network engineer must design an MSDP multicast solution to provide RP resilience in a network with two separate domains. Also, multicast sources and receivers must register with the local RP. Which solution must the engineer choose?

                                          Answer: D

                                          Explanation:
                                          Two or more RPs are configured with the same IP address (for example, 10.0.0.1) on loopback interfaces. The loopback address should be configured with a 32-bit mask. All the downstream routers are configured so that they know that 10.0.0.1 is the IP address of their local RP. IP routing automatically selects the topologically closest RP for each source and receiver.
                                          https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/Phase_1/mcstmsdp/mcst_ p1.html


                                          NEW QUESTION # 314
                                          A network engineer must design a multicast solution to prevent the spoofing of multicast streams and ensure efficient bandwidth utilization. The network will be merged with another multicast domain in the future, and the merge must require minimum effort. Which two solutions meet the customer requirements? (Choose two.)

                                          Answer: B,E

                                          Explanation:
                                          The ease of installation and operation of SSM makes it ideal for network operators, especially in those cases where content needs to be forwarded between multiple independent PIM domains (because there is no need to manage MSDP for SSM between PIM domains.
                                          https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16-book/imc-ssm.html


                                          NEW QUESTION # 315
                                          An engineer is looking for a standards-driven YANG model to manage a multivendor network environment.
                                          Which model must the engineer choose?

                                          Answer: B

                                          Explanation:
                                          "We support a comprehensive set of IOS XR native models as well as industry-driven OpenConfig models and standards-driven IETF models"
                                          https://blogs.cisco.com/sp/advancing-your-programmability-journey-with-latest-ios-xr-innovations


                                          NEW QUESTION # 316
                                          What is a challenge of the SaaS model?

                                          Answer: C

                                          Explanation:
                                          A major SaaS challenge is the lack of direct application and infrastructure control. With Software as a Service, the provider operates the application stack, platform, upgrades, and supporting infrastructure. The customer benefits from reduced maintenance burden and lower initial deployment cost, but gives up much of the direct control normally available with on-premises applications. This affects troubleshooting, change windows, performance visibility, customization, data residency controls, and integration with existing enterprise systems. Higher initial costs are usually not a SaaS characteristic; SaaS commonly shifts spending toward subscription operating expense. Client computer upgrades are not normally required in the same way as thick-client enterprise software. Data and application integration can be complex, but the option that best captures the core architectural challenge is reduced control over the application and infrastructure. Network architects must account for this by designing secure direct internet access, cloud monitoring, identity integration, and reliable paths to SaaS providers. Reference topics: SaaS architecture, cloud application control, enterprise cloud access, operational visibility, SD-WAN SaaS design.


                                          NEW QUESTION # 317
                                          Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic?

                                          Answer: D

                                          Explanation:
                                          A traffic storm occurs when packets flood the LAN, which creates excessive traffic and degrades network performance. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast, multicast, or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack.
                                          Reference: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/ book/storm.pdf


                                          NEW QUESTION # 318
                                          ......

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