300-420最新試題，300-420套裝

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Cisco 300-420 Exam Syllabus Topics:

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

                                          >> 300-420最新試題 <<

                                          300-420套裝，300-420考證

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                                          最新的 CCNP Enterprise 300-420 免費考試真題 (Q277-Q282):

                                          問題 #277

                                          Refer to the exhibit A customer requires a Layer 2 network designed to support:
                                          * 500 active logical ports
                                          * trunking of 30 VLANs
                                          * convergence of less than 1 second
                                          Which Spanning Tree Protocol must be selected?

                                          答案：C

                                          解題說明：
                                          MSTP is the correct spanning-tree choice for a Layer 2 design with many logical ports, multiple trunked VLANs, and a subsecond convergence requirement. Rapid PVST+ provides rapid convergence, but it creates a separate spanning-tree instance for every VLAN. With 30 VLANs on trunks and hundreds of active ports, the number of logical STP ports can grow quickly and increase CPU and memory load. MSTP maps many VLANs into a smaller number of spanning-tree instances while still using rapid convergence behavior based on IEEE 802.1w principles. This makes it more scalable for large Layer 2 domains than PVST+ or Rapid PVST+ when many VLANs are present. CST provides a single instance but lacks the flexibility and convergence characteristics expected in modern enterprise designs. The design needs both scalability and fast convergence, and MSTP is the standards-based protocol that best satisfies both requirements. Reference topics: MSTP, Rapid STP, logical STP ports, VLAN-to-instance mapping, Layer 2 scalability, convergence.


                                          問題 #278
                                          How do IETF, OpenConfig, and Cisco native YANG models differ when used to configure the same feature on an infrastructure device?

                                          答案：D


                                          問題 #279
                                          A company's branch location uses redundant routers and links for connectivity to the headquarters. Also, to use the entire available bandwidth, the branch uses a dynamic routing protocol. An architect must design a multicast streaming solution to avoid RPF check failures because of the current network design. Which deployment model must the architect choose?

                                          答案：A

                                          解題說明：
                                          BIDIR-PIM is the correct multicast deployment model when redundant paths and active links may create RPF challenges for many-to-many multicast traffic. Bidirectional PIM builds a shared tree rooted at the rendezvous point and avoids maintaining separate source-specific shortest-path trees for every sender. This is valuable when sources and receivers are spread across a redundant branch design and traffic can enter the multicast domain from multiple directions. Because BIDIR-PIM uses the Designated Forwarder mechanism on each link, it helps control which router forwards traffic toward the RP and reduces duplicate forwarding in topologies where normal RPF behavior could be problematic. PIM-SM is widely used, but it normally moves to source trees for active sources unless specifically controlled. PIM-SSM requires receivers to know the source and is not designed for arbitrary many-to-many communication. PIM-BSR is a mechanism for dynamic RP discovery, not a multicast forwarding model. Reference topics: BIDIR-PIM, multicast RPF, many-to-many multicast, Designated Forwarder, branch multicast design.


                                          問題 #280
                                          Drag and drop the steps WAN Edge performs when on-boarded into the Cisco SD-WAN overlay from the left into the order they are completed on the right.

                                          答案：

                                          解題說明：

                                          Explanation:
                                          Table Description automatically generated with low confidence


                                          問題 #281
                                          An architect is designing a network for an enterprise site. The design must use an active/backup design for the WAN. It must guarantee the SLA for several applications regardless of which connection is used. Which deployment model should the architect choose?

                                          答案：B


                                          問題 #282
                                          ......

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