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Cisco Designing Cisco Enterprise Networks : 300-420

300-420

Exam Code: 300-420

Exam Name: Designing Cisco Enterprise Networks

Updated: Jul 21, 2026

Q & A: 457 Questions and Answers

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About Cisco 300-420 Exam

Cisco 300-420 Exam Topics:

SectionWeightObjectives
WAN for Enterprise Networks20%-Compare WAN connectivity options
  • Layer 2 VPN
  • MPLS Layer 3 VPN
  • Metro Ethernet
  • DWDM
  • 4G/5G
  • SD-WAN customer edge

-Design site-to-site VPN

  • Dynamic Multipoint VPN (DMVPN)
  • Layer 2 VPN
  • MPLS Layer 3 VPN
  • IPsec
  • Generic Routing Encapsulation (GRE)
  • Group Encrypted Transport VPN (GET VPN)

-Design high availability for enterprise WAN

  • Single-homed
  • Multihomed
  • Backup connectivity
  • Failover

-Describe Cisco SD-WAN Architecture (orchestration plane, management plane, control plane, data plane, on-boarding and provisioning, security)
-Describe Cisco SD-WAN design considerations (control plane design, overlay design, LAN design, high availability, redundancy, scalability, security design, QoS and multicast over SD-WAN fabric)

Advanced Enterprise Campus Networks25%- Design campus networks for high availability
  • First Hop Redundancy Protocols
  • Platform abstraction techniques
  • Graceful restart
  • BFD

-Design campus Layer 2 infrastructures

  • STP scalability
  • Fast convergence
  • Loop-free technologies
  • PoE and WoL

-Design multicampus Layer 3 infrastructures

  • Convergence
  • Load sharing
  • Route summarization
  • Route filtering
  • VRFs
  • Optimal topologies
  • Redistribution

-Describe SD-Access Architecture (underlay, overlay, control and data plane, automation, wireless, and security)
-Describe SD-Access fabric design considerations for wired and wireless access (overlay, fabric design, control plan design, border design, segmentation, virtual networks, scalability, over the top and fabric for wireless, multicast)

Advanced Addressing and Routing Solutions25%-Create structured addressing plans for IPv4 and IPv6
-Create stable, secure, and scalable routing designs for IS-IS
-Create stable, secure, and scalable routing designs for EIGRP
-Create stable, secure, and scalable routing designs for OSPF
-Create stable, secure, and scalable routing designs for BGP
  • Address families
  • Basic route filtering
  • Attributes for path preference
  • Route reflectors
  • Load sharing

-Determine IPv6 migration strategies

  • Overlay (tunneling)
  • Native (dual-stacking)
  • Boundaries (IPv4/IPv6 translations)
Automation10%- Choose the correct YANG data model set based on requirements
-Differentiate between IETF, Openconfig, and Cisco native YANG models
-Differentiate between NETCONF and RESTCONF
-Describe the impact of model-driven telemetry on the network
  • Periodic publication
  • On-change publication

-Compare dial-in and dial-out approaches to model-driven telemetry

Network Services20%-Select appropriate QoS strategies to meet customer requirements (DiffServ, IntServ)
-Design end-to-end QoS policies
  • Classification and marking
  • Shaping
  • Policing
  • Queuing

-Design network management techniques

  • In-band vs. out-of-band
  • Segmented management networks
  • Prioritizing network management traffic

-Describe multicast routing concepts (source trees, shared trees, RPF, rendezvous points)
-Design multicast services (SSM, PIM bidirectional, MSDP)

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Highly similar to the real Designing Cisco Enterprise Networks exam

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Cisco 300-420: What? And How?

Exam 300-420 is suitable for system administrators, network engineers, and networking design engineers. All in all, there are several knowledge areas that you need to have a deep understanding of in order to pass such a test successfully. Thus, you should be familiar with the following:

  • Basic IP addressing and subnets;
  • Building simple LANs and basic network fundamentals.
  • Fundamental wireless networking notions as well as terms;
  • Routing & switching basics;

The most important information to look for after knowing that you qualify for such an exam is the skills measured. Generally, it is usually stated clearly through the topics covered. For this test, the main objectives are network services, advanced enterprise networks, automation, advanced addressing and routing solutions, network services, as well as WAN for enterprise networks. The exam format is another detail that you need to know about. Overall, there will be 60 multiple-choice questions, which you should complete within 90 minutes. You will certainly be able to answer all of them and get more than 825 points if you prepare wisely. Therefore, consider going for the official training and other prep resources, such as study guides, videos, and sample questions. To sit for this test, you need to pay $300 for the voucher. Also, please note that you can take it in English or Japanese. After you pass 300-420, you will get one of the Specialist certificates and the CCNP Enterprise if you take the Cisco 350-401 as well. However, you should understand that these are not lifetime certificates. They will be valid for only 3 years. After this period, you will be required to recertify to gain the desired benefits. There are a number of ways to follow this process. You can do so by taking the necessary exams or completing education activities. What is more, you can also do a combination of both.

We are born in a good time. Everything changes so fast because of the rapid development of technology. As long as you have good ideas and determination, you will finally harvest happiness. Otherwise, you will achieve nothing. Recently, our 300-420 test cram: Designing Cisco Enterprise Networks gains much attention among job seekers and students. Even if you know nothing about the knowledges of the 300-420 exam guide, you still can learn well through the help of our 300-420 study materials. Please try to broaden the knowledge when you are still young. You will benefit from your past efforts one day.

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Topics of Cisco 300-420 Exam

The Cisco 300-420 certification exam validates the students’ knowledge of enterprise design. It covers a wide range of subject areas, such as advanced addressing & routing solutions, security services, WAN, advanced enterprise campus networks, SDA, and network services. The breakdown of these topics into the components of skills to be measured in the test is as follows:

Advanced Routing and Addressing Solutions

About 25% of the exam content is covered in this domain, and the candidates have to perform their skills in the following tasks:

  • Developing the scalable, stable, and secure routing design for EIGRP, IS-IS, BGP, OSPF.
  • Creating the structured addressing strategies for both IPv6 & IPv4;

Reference: https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/ensld-300-420.html

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Cisco 300-420 Exam Syllabus Topics:

SectionWeightObjectives
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. Route redistribution and filtering
          • 3. IS-IS design
            • 4. EIGRP design
              Security Services10%- Security architecture design
              • 1. Threat defense integration
                • 2. Network segmentation
                  - Secure connectivity
                  Network Services15%- IP services
                  • 1. DHCP, DNS, NAT
                    - Quality of Service (QoS)
                    • 1. Classification and marking
                      • 2. Policing, shaping, congestion management
                        - Multicast design
                        Software-Defined Access (SDA)5%- Fabric design and deployment
                        - SD-Access architecture
                        - Control plane and data plane design
                        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
                                Advanced Enterprise Campus Networks25%- Layer 2 campus design
                                • 1. VLAN and trunking design
                                  • 2. Hierarchical architecture
                                    • 3. Spanning Tree Protocol optimization
                                      - Layer 3 campus design
                                      • 1. Routing in campus infrastructure
                                        • 2. Virtualization and segmentation
                                          - Wireless integration
                                          300-420 Related Exams
                                          300-430J - Implementing Cisco Enterprise Wireless Networks (300-430日本語版)
                                          300-425J - Designing Cisco Enterprise Wireless Networks (300-425日本語版)
                                          350-401 - Implementing Cisco Enterprise Network Core Technologies (350-401 ENCOR)
                                          300-415J - Implementing Cisco SD-WAN Solutions (300-415日本語版)
                                          300-440 - Designing and Implementing Cloud Connectivity
                                          Related Certifications
                                          CCIE Security
                                          CCNA Cyber Ops
                                          Wireless LAN
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                                          CCNP Voice
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