Cisco 300-420 Exam : Designing Cisco Enterprise Networks

300-420
  • Exam Code: 300-420
  • Exam Name: Designing Cisco Enterprise Networks
  • Updated: Jul 29, 2026
  • Q & A: 457 Questions and Answers

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About Cisco 300-420 Exam

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Intended Audience for Cisco 300-420

There are no formal prerequisites for the Cisco CCNP Enterprise but it is recommended that candidates should have at least 3 to 5 years of networking experience. This is because a lot of practical skills are tested during the exams, including 300-420. So, all you need is some underlying networking knowledge so that you have a basic understanding of everything that is being discussed.

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

Cisco 300-420: Target audience

The Cisco 300-420 test is designed for Wireless Design Engineers, Network Managers, Network Design Engineers, System Engineers, and Network Administrators. It is targeted at those individuals who want to certify or prove their knowledge and mastery in designing Cisco enterprise networks. The typical candidates for this Cisco certification exam are those people who are looking to be certified in the enterprise networks. They should have at least 3 years of hands-on experience in the field of designing these networks related to Cisco.

Cisco 300-420 Exam Topics:

SectionWeightObjectives
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)

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)

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

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)
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)

Further CCIE Certification Path

Acquiring the CCNP Enterprise certificate makes one eligible for the expert-level ones such as CCIE Enterprise Wireless and the CCIE Enterprise Infrastructure. The core test 350-401 is also one of the two requirements for these certifications, so the only step remaining is to pass one lab exam for any of the mentioned options. Both of those tests are 8 hours long and mostly assess one's practical competence.

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